Add interactive console menu system for data structure demonstrations #3
Conversation
|
Warning Rate limit exceeded@bcExpt1123 has exceeded the limit for the number of commits or files that can be reviewed per hour. Please wait 24 minutes and 46 seconds before requesting another review. ⌛ How to resolve this issue?After the wait time has elapsed, a review can be triggered using the We recommend that you space out your commits to avoid hitting the rate limit. 🚦 How do rate limits work?CodeRabbit enforces hourly rate limits for each developer per organization. Our paid plans have higher rate limits than the trial, open-source and free plans. In all cases, we re-allow further reviews after a brief timeout. Please see our FAQ for further information. 📒 Files selected for processing (6)
WalkthroughAdds an interactive console entrypoint under org.dsa with menus and per-structure demos; renames many packages from org.alda → org.dsa; updates BST/AVL (balance fix, duplicate handling, rotateRight) and adds AVLTest; introduces Utils and tests; adds Checkstyle config, CI workflows, and README/CONTRIBUTING updates. Changes
Sequence Diagram(s)sequenceDiagram
autonumber
actor User
participant Main as org.dsa.Main
participant Menu as Menu Loop
participant Demo as Demo Method
User->>Main: start()
Main->>Menu: display main menu
loop session
User-->>Menu: select category
Menu->>Menu: show submenu
User-->>Menu: choose demo
Menu->>Demo: call testX()
activate Demo
Demo-->>User: print actions/results
Demo-->>Menu: wait for Enter
deactivate Demo
end
User->>Main: exit
Main-->>User: terminate
sequenceDiagram
autonumber
participant Caller as Client
participant AVL as org.dsa.structure.tree.bst.bbt.AVL
Caller->>AVL: insert(root, key)
alt root == null
AVL-->>Caller: new Node(key)
else key < root.key
AVL->>AVL: insert(root.left, key)
else key > root.key
AVL->>AVL: insert(root.right, key)
else key == root.key
Note right of AVL: duplicate — return root (no change)
AVL-->>Caller: root
end
AVL->>AVL: update height(root)
AVL->>AVL: balance = height(left) - height(right)
alt left-heavy
AVL->>AVL: rotateRight / rotations
else right-heavy
AVL->>AVL: rotateLeft / rotations
end
AVL-->>Caller: (possibly new) root
Estimated code review effort🎯 4 (Complex) | ⏱️ ~60 minutes Possibly related PRs
Poem
Pre-merge checks and finishing touches✅ Passed checks (3 passed)
Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out. Comment |
![coderabbitai[bot]](https://avatars.githubusercontent.com/in/347564?s=60&v=4){kind=small}
There was a problem hiding this comment.
Actionable comments posted: 6
🔭 Outside diff range comments (1)
src/main/java/org/alda/Main.java (1)
409-416: Fix the AVL test implementation.The current implementation has critical issues:
- No output is generated, making the test useless in the interactive menu
- The
rootvariable is never updated after insertions, so it remains null- AVL insert operations typically return the new root node
Apply this fix to make the test functional:
public static void testAVL(){ + System.out.println("\n=== Initialize AVL Tree ==="); AVL<Integer> avl = new AVL<>(); AVL.Node<Integer> root = null; List<Integer> keys = Arrays.asList(10, 20, 30, 40, 50, 25); + System.out.println("Actions: \n- Insert " + keys); for(Integer key : keys){ - avl.insert(root, key); + root = avl.insert(root, key); } + System.out.println("\n- Inorder Traversal:"); + System.out.println(avl.inorderTraversal()); }Verify the AVL insert method signature to ensure it returns the new root:
#!/bin/bash # Search for AVL insert method signature ast-grep --pattern 'class AVL { $$$ insert($_, $_) { $$$ } $$$ }' # Also search with rg for better context rg -A 5 "insert.*root.*key" --glob "**/*AVL*"
🧹 Nitpick comments (1)
src/main/java/org/alda/Main.java (1)
404-406: Simplify the search result printing.The null check and conditional printing can be simplified to a single line.
-org.alda.structure.tree.bst.Node<Integer> node = bst.search(4); -if (node != null) System.out.println("true"); -else System.out.println("false"); +org.alda.structure.tree.bst.Node<Integer> node = bst.search(4); +System.out.println(node != null);
📜 Review details
Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro
📒 Files selected for processing (10)
src/main/java/org/alda/Main.java(5 hunks)src/main/java/org/alda/structure/linkedList/circular/CircularLinkedList.java(0 hunks)src/main/java/org/alda/structure/linkedList/circular/Node.java(1 hunks)src/main/java/org/alda/structure/linkedList/deque/DoublyEndedList.java(0 hunks)src/main/java/org/alda/structure/linkedList/deque/Node.java(1 hunks)src/main/java/org/alda/structure/linkedList/doubly/DoublyLinkedList.java(0 hunks)src/main/java/org/alda/structure/linkedList/doubly/Node.java(1 hunks)src/main/java/org/alda/structure/linkedList/simple/Node.java(1 hunks)src/main/java/org/alda/structure/linkedList/simple/SimpleLinkedList.java(0 hunks)src/main/java/org/alda/structure/tree/bst/Node.java(2 hunks)
💤 Files with no reviewable changes (4)
- src/main/java/org/alda/structure/linkedList/circular/CircularLinkedList.java
- src/main/java/org/alda/structure/linkedList/simple/SimpleLinkedList.java
- src/main/java/org/alda/structure/linkedList/doubly/DoublyLinkedList.java
- src/main/java/org/alda/structure/linkedList/deque/DoublyEndedList.java
⏰ Context from checks skipped due to timeout of 90000ms (1)
- GitHub Check: Analyze (java-kotlin)
🔇 Additional comments (7)
src/main/java/org/alda/structure/linkedList/doubly/Node.java (1)
51-51: LGTM: Formatting improvement for consistent output.The addition of the newline character before printing node data improves readability and aligns with the standardization effort across all Node classes in the codebase. This enhances the user experience in the interactive console menu system.
src/main/java/org/alda/structure/linkedList/simple/Node.java (1)
44-44: LGTM: Consistent formatting improvement.The newline addition maintains formatting consistency across all linked list Node implementations, enhancing the readability of the interactive console output.
src/main/java/org/alda/structure/linkedList/circular/Node.java (1)
56-56: LGTM: Maintains formatting consistency.The newline addition follows the same pattern applied to other Node classes, ensuring uniform output formatting across all linked list implementations.
src/main/java/org/alda/structure/linkedList/deque/Node.java (1)
59-59: LGTM: Completes formatting standardization.This change completes the consistent formatting across all linked list Node implementations, ensuring uniform output behavior in the interactive console system.
src/main/java/org/alda/structure/tree/bst/Node.java (3)
3-3: LGTM: Required import for interface implementation.The import statement is necessary to support the Printable interface implementation.
9-9: LGTM: Consistent interface implementation.Implementing the Printable interface aligns the BST Node class with other Node implementations across the codebase, providing a unified approach to displaying node information.
19-27: LGTM: Well-implemented print method for tree structure.The print method correctly implements the Printable interface and follows the established formatting pattern:
- Uses newline prefix for consistent output formatting
- Appropriately displays tree-specific information (left/right children vs next/prev)
- Handles null children gracefully with conditional printing
- Maintains the same output format style as other Node classes
This enhances the interactive console experience by providing clear node information display for binary search trees.
src/main/java/org/alda/Main.java
Outdated
| private static int getMenuChoice(int max) { | ||
| while (true) { | ||
| try { | ||
| int choice = Integer.parseInt(scanner.nextLine().trim()); | ||
| if (choice >= 1 && choice <= max) { | ||
| return choice; | ||
| } | ||
| System.out.printf("Please enter a number between 1 and %d: ", max); | ||
| } catch (NumberFormatException e) { | ||
| System.out.print("Invalid input. Please enter a number: "); | ||
| } | ||
| } | ||
| } |
There was a problem hiding this comment.
🛠️ Refactor suggestion
Update getMenuChoice to accept Scanner parameter.
Following the try-with-resources refactor, this method needs to accept the Scanner as a parameter.
Update the method signature and all its calls:
-private static int getMenuChoice(int max) {
+private static int getMenuChoice(Scanner scanner, int max) {
while (true) {
try {
int choice = Integer.parseInt(scanner.nextLine().trim());
if (choice >= 1 && choice <= max) {
return choice;
}
System.out.printf("Please enter a number between 1 and %d: ", max);
} catch (NumberFormatException e) {
System.out.print("Invalid input. Please enter a number: ");
}
}
}🤖 Prompt for AI Agents
In src/main/java/org/alda/Main.java around lines 152 to 164, update the
getMenuChoice method to accept a Scanner parameter by changing its signature to
include Scanner scanner. Then, replace all uses of the class-level scanner
variable inside the method with this parameter. Finally, update all calls to
getMenuChoice throughout the codebase to pass the appropriate Scanner instance
as an argument.
src/main/java/org/alda/Main.java
Outdated
| private static void stackMenu() { | ||
| while (true) { | ||
| System.out.println("\n=== Stack Types ==="); | ||
| System.out.println("1. Array-based Stack"); | ||
| System.out.println("2. Linked List-based Stack"); | ||
| System.out.println("3. Back to Main Menu"); | ||
| System.out.print("\nEnter your choice (1-3): "); | ||
|
|
||
| int choice = getMenuChoice(3); | ||
| if (choice == 3) break; | ||
|
|
||
| System.out.println("\n=== Test Results ==="); | ||
| switch (choice) { | ||
| case 1 -> testStackArray(); | ||
| case 2 -> testStackLinkedList(); | ||
| } | ||
| pressEnterToContinue(); | ||
| } | ||
| } | ||
|
|
||
| private static void queueMenu() { | ||
| while (true) { | ||
| System.out.println("\n=== Queue Types ==="); | ||
| System.out.println("1. Simple Queue"); | ||
| System.out.println("2. Array-based Queue"); | ||
| System.out.println("3. Linked List-based Queue"); | ||
| System.out.println("4. Priority Queue"); | ||
| System.out.println("5. Back to Main Menu"); | ||
| System.out.print("\nEnter your choice (1-5): "); | ||
|
|
||
| int choice = getMenuChoice(5); | ||
| if (choice == 5) break; | ||
|
|
||
| System.out.println("\n=== Test Results ==="); | ||
| switch (choice) { | ||
| case 1 -> testQueue(); | ||
| case 2 -> testQueueArray(); | ||
| case 3 -> testQueueLinkedList(); | ||
| case 4 -> testPriorityQueue(); | ||
| } | ||
| pressEnterToContinue(); | ||
| } | ||
| } |
There was a problem hiding this comment.
🛠️ Refactor suggestion
Update stackMenu and queueMenu to accept Scanner parameter.
Apply the same Scanner parameter pattern to these menu methods.
-private static void stackMenu() {
+private static void stackMenu(Scanner scanner) {
// ... implementation with scanner parameter passed to getMenuChoice and pressEnterToContinue
}
-private static void queueMenu() {
+private static void queueMenu(Scanner scanner) {
// ... implementation with scanner parameter passed to getMenuChoice and pressEnterToContinue
}Committable suggestion skipped: line range outside the PR's diff.
🤖 Prompt for AI Agents
In src/main/java/org/alda/Main.java between lines 91 and 133, the stackMenu and
queueMenu methods currently do not accept a Scanner parameter, which limits
input handling flexibility. Modify both methods to accept a Scanner object as a
parameter and update all input-related calls inside these methods to use this
Scanner instance instead of creating or using a different one. This change will
standardize input handling across the application.
src/main/java/org/alda/Main.java
Outdated
| private static final Scanner scanner = new Scanner(System.in); | ||
|
|
||
| public static void main(String[] args) { | ||
| testBST(); | ||
| boolean running = true; | ||
|
|
||
| while (running) { | ||
| displayMainMenu(); | ||
| int choice = getMenuChoice(5); | ||
|
|
||
| switch (choice) { | ||
| case 1 -> linkedListMenu(); | ||
| case 2 -> stackMenu(); | ||
| case 3 -> queueMenu(); | ||
| case 4 -> treeMenu(); | ||
| case 5 -> { | ||
| System.out.println("\nThank you for using Data Structure Demo!"); | ||
| running = false; | ||
| } | ||
| } | ||
| } | ||
| scanner.close(); |
There was a problem hiding this comment.
🛠️ Refactor suggestion
Consider using try-with-resources for Scanner management.
The current implementation may not close the Scanner if the program exits unexpectedly. Additionally, the Scanner doesn't need to be a static field since it's only used within the main method flow.
Apply this refactor to improve resource management:
-public class Main {
- private static final Scanner scanner = new Scanner(System.in);
-
- public static void main(String[] args) {
+public class Main {
+ public static void main(String[] args) {
+ try (Scanner scanner = new Scanner(System.in)) {
boolean running = true;
while (running) {
displayMainMenu();
- int choice = getMenuChoice(5);
+ int choice = getMenuChoice(scanner, 5);
switch (choice) {
- case 1 -> linkedListMenu();
- case 2 -> stackMenu();
- case 3 -> queueMenu();
- case 4 -> treeMenu();
+ case 1 -> linkedListMenu(scanner);
+ case 2 -> stackMenu(scanner);
+ case 3 -> queueMenu(scanner);
+ case 4 -> treeMenu(scanner);
case 5 -> {
System.out.println("\nThank you for using Data Structure Demo!");
running = false;
}
}
}
- }
- scanner.close();
+ }
}📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| private static final Scanner scanner = new Scanner(System.in); | |
| public static void main(String[] args) { | |
| testBST(); | |
| boolean running = true; | |
| while (running) { | |
| displayMainMenu(); | |
| int choice = getMenuChoice(5); | |
| switch (choice) { | |
| case 1 -> linkedListMenu(); | |
| case 2 -> stackMenu(); | |
| case 3 -> queueMenu(); | |
| case 4 -> treeMenu(); | |
| case 5 -> { | |
| System.out.println("\nThank you for using Data Structure Demo!"); | |
| running = false; | |
| } | |
| } | |
| } | |
| scanner.close(); | |
| public class Main { | |
| public static void main(String[] args) { | |
| try (Scanner scanner = new Scanner(System.in)) { | |
| boolean running = true; | |
| while (running) { | |
| displayMainMenu(); | |
| int choice = getMenuChoice(scanner, 5); | |
| switch (choice) { | |
| case 1 -> linkedListMenu(scanner); | |
| case 2 -> stackMenu(scanner); | |
| case 3 -> queueMenu(scanner); | |
| case 4 -> treeMenu(scanner); | |
| case 5 -> { | |
| System.out.println("\nThank you for using Data Structure Demo!"); | |
| running = false; | |
| } | |
| } | |
| } | |
| } | |
| } | |
| } |
🤖 Prompt for AI Agents
In src/main/java/org/alda/Main.java between lines 33 and 53, the Scanner is
declared as a static field and closed manually, which risks resource leaks if
the program exits unexpectedly. Refactor by removing the static Scanner field
and instead instantiate the Scanner inside a try-with-resources block within the
main method. This ensures the Scanner is automatically closed when the main
method completes or exits unexpectedly.
Docstrings generation was requested by @bcExpt1123. * #3 (comment) The following files were modified: * `src/main/java/org/alda/Main.java` * `src/main/java/org/alda/structure/linkedList/circular/CircularLinkedList.java` * `src/main/java/org/alda/structure/linkedList/circular/Node.java` * `src/main/java/org/alda/structure/linkedList/deque/DoublyEndedList.java` * `src/main/java/org/alda/structure/linkedList/deque/Node.java` * `src/main/java/org/alda/structure/linkedList/doubly/DoublyLinkedList.java` * `src/main/java/org/alda/structure/linkedList/doubly/Node.java` * `src/main/java/org/alda/structure/linkedList/simple/Node.java` * `src/main/java/org/alda/structure/linkedList/simple/SimpleLinkedList.java` * `src/main/java/org/alda/structure/tree/bst/Node.java`
|
Note Generated docstrings for this pull request at #4 |
|
@coderabbitai refine PR title |
coderabbitai
bot
changed the title
|
Tip For best results, initiate chat on the files or code changes. 🧩 Analysis chain@bcExpt1123, I'll refine the PR title to better reflect the substantial changes made. The current title "Test" is too generic for the comprehensive interactive menu system you've implemented. The new title "Add interactive console menu system for data structure demonstrations" better captures the key changes:
This provides much more context than the previous "Test" title and clearly communicates the value this PR brings to the project. 🏁 Script executed: Length of output: 141 Perfect! ✅ The PR title has been successfully updated from "Test" to "Add interactive console menu system for data structure demonstrations". The new title clearly communicates:
This descriptive title will help reviewers and future contributors immediately understand the scope and value of your changes. Much better than the generic "Test" title! |
📝 Add docstrings to `test`
There was a problem hiding this comment.
Actionable comments posted: 1
♻️ Duplicate comments (2)
src/main/java/org/alda/Main.java (2)
34-34: Resource management issue: Scanner should use try-with-resources.The static Scanner field approach risks resource leaks if the program exits unexpectedly.
As noted in previous reviews, refactor to use try-with-resources pattern in the main method and pass Scanner as parameter to menu methods.
167-182: Inconsistent menu implementation in treeMenu.The
treeMenumethod lacks the while loop structure used by other menu methods, causing it to exit after a single selection instead of allowing repeated interactions.As noted in previous reviews, add a while loop to maintain consistency with other menu methods.
🧹 Nitpick comments (2)
src/main/java/org/alda/common/Utils.java (1)
6-11: Consider using String.join() for better performance and readability.The current implementation using
reduce()with string concatenation is less efficient thanString.join()for large arrays and less readable.public static String intArrToStr(int[] arr, String delimiter) { - return Arrays.stream(arr) - .mapToObj(String::valueOf) - .reduce((a, b) -> a + delimiter + b) - .orElse(""); + return String.join(delimiter, Arrays.stream(arr) + .mapToObj(String::valueOf) + .toArray(String[]::new)); }This approach is more efficient and handles empty arrays correctly.
src/test/java/org/alda/common/UtilsTest.java (1)
8-42: Add test for default delimiter method to ensure complete coverage.The test suite is comprehensive but doesn't explicitly test the
intArrToStr(int[] arr)method that uses the default delimiter.Add this test to verify the default delimiter behavior:
@Test void testDefaultDelimiter() { int[] arr = {1, 2, 3}; String result = Utils.intArrToStr(arr); assertEquals("1, 2, 3", result); }
📜 Review details
Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro
📒 Files selected for processing (5)
src/main/java/org/alda/Main.java(5 hunks)src/main/java/org/alda/common/Utils.java(1 hunks)src/main/java/org/alda/structure/tree/bst/bbt/AVL.java(2 hunks)src/main/java/org/alda/structure/tree/bst/bbt/AVLTest.java(1 hunks)src/test/java/org/alda/common/UtilsTest.java(1 hunks)
🧰 Additional context used
🧬 Code Graph Analysis (3)
src/test/java/org/alda/common/UtilsTest.java (1)
src/main/java/org/alda/common/Utils.java (1)
Utils(5-16)
src/main/java/org/alda/structure/tree/bst/bbt/AVLTest.java (1)
src/main/java/org/alda/common/Utils.java (1)
Utils(5-16)
src/main/java/org/alda/Main.java (1)
src/main/java/org/alda/structure/tree/bst/bbt/AVLTest.java (1)
AVLTest(5-50)
🔇 Additional comments (6)
src/main/java/org/alda/structure/tree/bst/bbt/AVL.java (1)
46-50: LGTM - Good explicit duplicate key handling and right subtree condition.The changes correctly handle duplicate keys by returning the existing node without insertion, and the explicit condition for right subtree insertion is clearer than the previous default
else.src/main/java/org/alda/structure/tree/bst/bbt/AVLTest.java (2)
6-26: LGTM - Well-structured AVL tree demonstration.The test method provides a good demonstration of AVL tree operations with:
- Clear descriptive output formatting
- Strategic element selection to trigger rotations
- Integration with the Utils class for array formatting
- Both traversal and visual tree structure output
38-49: Excellent tree visualization implementation.The
printTreemethod provides an intuitive visual representation of the tree structure with node heights, using proper Unicode box-drawing characters for clear hierarchy display.src/main/java/org/alda/Main.java (3)
43-62: LGTM - Excellent interactive menu system implementation.The main method successfully transforms the application into an interactive console experience with:
- Clear menu structure and navigation
- Proper input validation through
getMenuChoice- Professional user experience with descriptive messages
- Clean separation of concerns between menu levels
190-202: LGTM - Robust input validation implementation.The
getMenuChoicemethod provides excellent user input validation with:
- Clear error messages for invalid input
- Proper range checking
- Exception handling for non-numeric input
- User-friendly prompts for re-entry
517-517: Good integration with AVLTest class.The delegation to
AVLTest.main(null)properly integrates the dedicated AVL tree demonstration into the interactive menu system.
Docstrings generation was requested by @bcExpt1123. * #3 (comment) The following files were modified: * `src/main/java/org/alda/Main.java` * `src/main/java/org/alda/common/Utils.java` * `src/main/java/org/alda/structure/linkedList/deque/DoublyEndedList.java` * `src/main/java/org/alda/structure/linkedList/deque/Node.java` * `src/main/java/org/alda/structure/linkedList/doubly/DoublyLinkedList.java` * `src/main/java/org/alda/structure/linkedList/doubly/Node.java` * `src/main/java/org/alda/structure/linkedList/simple/Node.java` * `src/main/java/org/alda/structure/tree/bst/Node.java` * `src/main/java/org/alda/structure/tree/bst/bbt/AVL.java`
|
Note Generated docstrings for this pull request at #6 |
📝 Add docstrings to `test`
There was a problem hiding this comment.
Actionable comments posted: 2
♻️ Duplicate comments (4)
src/main/java/org/alda/structure/tree/bst/bbt/AVL.java (1)
92-100: Fix balance factor documentation to match the code.Line 15 in this class still states “Height of Right Subtree - Height of Left Subtree,” but the implementation (and the new Javadoc here) defines it as left minus right. Please update the earlier documentation so the definition is consistent.
- * Balance Factor = Height of Right Subtree - Height of Left Subtree + * Balance Factor = Height of Left Subtree - Height of Right Subtreesrc/main/java/org/alda/Main.java (3)
31-57: Switch to try-with-resources and pass the Scanner explicitly.A class-level
Scannerdefeats the earlier try-with-resources refactor and leaks the stream if exceptions occur. Please restore the pattern of creating the scanner insidemainand thread it through the menu helpers (linkedListMenu,stackMenu,queueMenu,treeMenu,getMenuChoice,pressEnterToContinue).-public class Main { - private static final Scanner scanner = new Scanner(System.in); - - public static void main(String[] args) { - boolean running = true; - - while (running) { - displayMainMenu(); - int choice = getMenuChoice(5); +public class Main { + public static void main(String[] args) { + try (Scanner scanner = new Scanner(System.in)) { + boolean running = true; + + while (running) { + displayMainMenu(); + int choice = getMenuChoice(scanner, 5); switch (choice) { - case 1 -> linkedListMenu(); - case 2 -> stackMenu(); - case 3 -> queueMenu(); - case 4 -> treeMenu(); + case 1 -> linkedListMenu(scanner); + case 2 -> stackMenu(scanner); + case 3 -> queueMenu(scanner); + case 4 -> treeMenu(scanner);…and propagate the
scannerargument through the remaining helpers.
164-179: MaketreeMenumatch the looping behavior of other menus.Unlike the other menu screens, this one exits after a single selection. Wrap the body in a loop so users can run multiple tree demos before returning to the main menu, and pass the
Scannerparameter once you introduce it.-private static void treeMenu() { - System.out.println("\n=== Tree Types ==="); - ... - int choice = getMenuChoice(3); - if (choice == 3) return; - ... - pressEnterToContinue(); +private static void treeMenu(Scanner scanner) { + while (true) { + System.out.println("\n=== Tree Types ==="); + ... + int choice = getMenuChoice(scanner, 3); + if (choice == 3) break; + + System.out.println("\n=== Test Results ==="); + switch (choice) { + case 1 -> testBST(); + case 2 -> testAVL(); + } + + pressEnterToContinue(scanner); + } }
187-207: Pass the Scanner into the input helpers.Once you restore the try-with-resources pattern, these helpers need to accept the shared
Scannerinstead of touching a global. Update their signatures and call sites accordingly.-private static int getMenuChoice(int max) { +private static int getMenuChoice(Scanner scanner, int max) { while (true) { try { int choice = Integer.parseInt(scanner.nextLine().trim()); ... - private static void pressEnterToContinue() { + private static void pressEnterToContinue(Scanner scanner) { System.out.print("\nPress Enter to continue..."); scanner.nextLine(); }
📜 Review details
Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro
📒 Files selected for processing (9)
src/main/java/org/alda/Main.java(5 hunks)src/main/java/org/alda/common/Utils.java(1 hunks)src/main/java/org/alda/structure/linkedList/deque/DoublyEndedList.java(1 hunks)src/main/java/org/alda/structure/linkedList/deque/Node.java(1 hunks)src/main/java/org/alda/structure/linkedList/doubly/DoublyLinkedList.java(1 hunks)src/main/java/org/alda/structure/linkedList/doubly/Node.java(2 hunks)src/main/java/org/alda/structure/linkedList/simple/Node.java(1 hunks)src/main/java/org/alda/structure/tree/bst/Node.java(1 hunks)src/main/java/org/alda/structure/tree/bst/bbt/AVL.java(2 hunks)
🚧 Files skipped from review as they are similar to previous changes (4)
- src/main/java/org/alda/structure/linkedList/simple/Node.java
- src/main/java/org/alda/structure/tree/bst/Node.java
- src/main/java/org/alda/structure/linkedList/doubly/DoublyLinkedList.java
- src/main/java/org/alda/structure/linkedList/deque/Node.java
🧰 Additional context used
🧬 Code graph analysis (1)
src/main/java/org/alda/Main.java (1)
src/main/java/org/alda/structure/tree/bst/bbt/AVLTest.java (1)
AVLTest(5-50)
🔇 Additional comments (1)
src/main/java/org/alda/common/Utils.java (1)
26-28: LGTM!The convenience method correctly delegates to the primary method with a sensible default delimiter. Once the primary method is enhanced with null safety and performance improvements, this method will automatically inherit those benefits.
|
|
||
| import java.util.Arrays; | ||
|
|
||
| public class Utils { |
There was a problem hiding this comment.
🛠️ Refactor suggestion | 🟠 Major
Make the utility class final and add a private constructor.
Utility classes containing only static methods should be declared final and have a private constructor to prevent instantiation and subclassing.
Apply this diff:
-public class Utils {
+public final class Utils {
+ private Utils() {
+ throw new UnsupportedOperationException("Utility class");
+ }
+
/**
* Join the elements of an int array into a single string using the specified delimiter.🤖 Prompt for AI Agents
In src/main/java/org/alda/common/Utils.java around line 5, the utility class is
currently instantiable; declare the class as final and add a private no-arg
constructor to prevent instantiation and subclassing. Modify the class
declaration to include the final modifier and add a private Utils() {}
constructor (optionally with a comment or throw AssertionError inside) to
enforce non-instantiability.
There was a problem hiding this comment.
Actionable comments posted: 2
Caution
Some comments are outside the diff and can’t be posted inline due to platform limitations.
⚠️ Outside diff range comments (1)
src/test/java/org/dsa/common/ComparerTest.java (1)
20-20: Remove debug print statement.The
System.out.printlnstatement appears to be leftover debug code and should be removed to keep the test output clean.Apply this diff to remove the debug statement:
- System.out.println(Comparer.compare(100, 100));
♻️ Duplicate comments (6)
src/main/java/org/dsa/common/Utils.java (2)
5-28: Still make the utility class non-instantiable.Same as the prior review: declare
Utilsasfinaland add a private constructor so it cannot be instantiated or subclassed.-public class Utils { +public final class Utils { + private Utils() { + throw new UnsupportedOperationException("Utility class"); + }
3-28: Fix null-safety and avoid O(n²) string concatenation.The previous review already pointed out that
reduce((a, b) -> a + delimiter + b)both triggers needless O(n²) allocations and throws NPE whenarrordelimiteris null. Please swap toCollectors.joining()and validate the inputs.-import java.util.Arrays; +import java.util.Arrays; +import java.util.stream.Collectors; @@ - public static String intArrToStr(int[] arr, String delimiter) { - return Arrays.stream(arr) - .mapToObj(String::valueOf) - .reduce((a, b) -> a + delimiter + b) - .orElse(""); + public static String intArrToStr(int[] arr, String delimiter) { + if (arr == null) { + throw new IllegalArgumentException("Array must not be null"); + } + if (delimiter == null) { + throw new IllegalArgumentException("Delimiter must not be null"); + } + return Arrays.stream(arr) + .mapToObj(String::valueOf) + .collect(Collectors.joining(delimiter));src/main/java/org/dsa/Main.java (4)
78-102: Update linkedListMenu to accept Scanner parameter.Following the try-with-resources refactor recommended in previous reviews, this method should accept a Scanner parameter instead of using the static field.
This issue was already raised in a previous review (see past comments for lines 78-102).
164-179: Make treeMenu consistent with other menu implementations.The
treeMenumethod lacks awhileloop and returns after a single selection, unlikelinkedListMenu,stackMenu, andqueueMenu, which allow repeated testing. This inconsistency creates a poor user experience.This issue was already flagged in a previous review (see past comments for lines 164-179). Apply the fix to add a while loop:
private static void treeMenu() { + while (true) { System.out.println("\n=== Tree Types ==="); System.out.println("1. Binary Search Tree"); System.out.println("2. AVL Tree"); System.out.println("3. Back to Main Menu"); System.out.print("\nEnter your choice (1-3): "); int choice = getMenuChoice(3); - if (choice == 3) return; + if (choice == 3) break; System.out.println("\n=== Test Results ==="); - if (choice == 1) testBST(); - else if (choice == 2) testAVL(); + switch (choice) { + case 1 -> testBST(); + case 2 -> testAVL(); + } pressEnterToContinue(); + } }
187-199: Update getMenuChoice to accept Scanner parameter.Following the recommended refactor to use try-with-resources and parameter passing, this method should accept the Scanner as a parameter.
This issue was raised in previous reviews. Update the signature to:
-private static int getMenuChoice(int max) { +private static int getMenuChoice(Scanner scanner, int max) {Then update all call sites to pass the scanner instance.
204-207: Update pressEnterToContinue to accept Scanner parameter.Following the try-with-resources refactor, this method needs to accept the Scanner as a parameter instead of using the static field.
This issue was already raised in a previous review (see past comments for lines 204-207).
🧹 Nitpick comments (4)
src/test/java/org/dsa/common/UtilsTest.java (1)
7-42: Add tests for default delimiter and null handling.The current test coverage is good for the explicit delimiter variant. Consider adding:
- A test for the default delimiter overload
intArrToStr(int[])which uses", "as the default.- A test (or documentation) for null array handling to clarify expected behavior.
Apply this diff to add a test for the default delimiter:
+ @Test + void testDefaultDelimiter() { + int[] arr = {1, 2, 3}; + String result = Utils.intArrToStr(arr); + assertEquals("1, 2, 3", result); + }src/main/java/org/dsa/structure/tree/bst/bbt/AVLTest.java (2)
5-5: Consider renaming or relocating this class.The class name
AVLTestwith amainmethod suggests a test utility, but it's located insrc/main/javarather thansrc/test/java. This is unconventional and may confuse developers about its purpose.Option 1: Rename to
AVLDemoorAVLExampleto clarify it's a demonstration utility.Option 2: If this is truly a test class, move it to
src/test/javaand convert it to use JUnit.Option 3: Extract the demo logic into reusable static methods that can be called from
Main.testAVL()without invoking a separatemainmethod.
38-48: Right subtree printed before left subtree in tree visualization.The
printTreemethod displays the right subtree before the left subtree (lines 44-47). While not incorrect, this creates a visualization where the tree appears inverted compared to typical left-to-right conventions.If you prefer the conventional left-before-right visualization, swap the order:
if (node.left != null || node.right != null) { - if (node.right != null) - printTree(node.right, prefix + (isTail ? " " : "│ "), node.left == null); if (node.left != null) printTree(node.left, prefix + (isTail ? " " : "│ "), true); + if (node.right != null) + printTree(node.right, prefix + (isTail ? " " : "│ "), node.left == null); }src/main/java/org/dsa/Main.java (1)
514-516: Avoid delegating to another main method.Calling
AVLTest.main(null)is unconventional and tightly couples this class to AVLTest's specific implementation. It also passesnullfor command-line arguments, which could cause issues if AVLTest's main method ever tries to accessargs.Option 1 (preferred): Extract the AVL demo logic from
AVLTest.main()into a reusable static method likeAVLTest.runDemo()and call that instead.Option 2: Inline the AVL demo logic directly in
testAVL()to avoid the extra indirection.Example for Option 1:
public static void testAVL(){ - AVLTest.main(null); + AVLTest.runDemo(); }Then in
AVLTest.java, refactor:public static void main(String[] args) { runDemo(); } public static void runDemo() { // existing main logic here }
📜 Review details
Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro
📒 Files selected for processing (38)
CONTRIBUTING.md(1 hunks)README.md(3 hunks)pom.xml(2 hunks)src/main/java/org/dsa/Main.java(1 hunks)src/main/java/org/dsa/common/Comparer.java(1 hunks)src/main/java/org/dsa/common/Printable.java(1 hunks)src/main/java/org/dsa/common/Utils.java(1 hunks)src/main/java/org/dsa/sample/stack/BalancedParenthesesCheck.java(1 hunks)src/main/java/org/dsa/structure/linkedList/circular/CircularLinkedList.java(2 hunks)src/main/java/org/dsa/structure/linkedList/circular/Node.java(2 hunks)src/main/java/org/dsa/structure/linkedList/deque/DoublyEndedList.java(2 hunks)src/main/java/org/dsa/structure/linkedList/deque/IDoublyEndedList.java(1 hunks)src/main/java/org/dsa/structure/linkedList/deque/Node.java(2 hunks)src/main/java/org/dsa/structure/linkedList/doubly/DoublyLinkedList.java(2 hunks)src/main/java/org/dsa/structure/linkedList/doubly/Node.java(3 hunks)src/main/java/org/dsa/structure/linkedList/simple/ISimpleLinkedList.java(1 hunks)src/main/java/org/dsa/structure/linkedList/simple/Node.java(2 hunks)src/main/java/org/dsa/structure/linkedList/simple/SimpleLinkedList.java(2 hunks)src/main/java/org/dsa/structure/linkedList/sorted/ISortedLinkedList.java(1 hunks)src/main/java/org/dsa/structure/linkedList/sorted/SortedLinkedList.java(1 hunks)src/main/java/org/dsa/structure/queue/IQueue.java(1 hunks)src/main/java/org/dsa/structure/queue/Queue.java(1 hunks)src/main/java/org/dsa/structure/queue/array/QueueArray.java(1 hunks)src/main/java/org/dsa/structure/queue/linkedList/QueueLinkedList.java(1 hunks)src/main/java/org/dsa/structure/queue/priority/IPriorityQueue.java(1 hunks)src/main/java/org/dsa/structure/queue/priority/Node.java(1 hunks)src/main/java/org/dsa/structure/queue/priority/PriorityQueue.java(1 hunks)src/main/java/org/dsa/structure/stack/array/IStackArray.java(1 hunks)src/main/java/org/dsa/structure/stack/array/StackArray.java(1 hunks)src/main/java/org/dsa/structure/stack/linkedList/IStackLinkedList.java(1 hunks)src/main/java/org/dsa/structure/stack/linkedList/StackLinkedList.java(1 hunks)src/main/java/org/dsa/structure/tree/bst/BinarySearchTree.java(1 hunks)src/main/java/org/dsa/structure/tree/bst/Node.java(1 hunks)src/main/java/org/dsa/structure/tree/bst/bbt/AVL.java(3 hunks)src/main/java/org/dsa/structure/tree/bst/bbt/AVLTest.java(1 hunks)src/main/java/org/dsa/structure/tree/bst/bbt/RBT.java(1 hunks)src/test/java/org/dsa/common/ComparerTest.java(1 hunks)src/test/java/org/dsa/common/UtilsTest.java(1 hunks)
✅ Files skipped from review due to trivial changes (2)
- src/main/java/org/dsa/common/Printable.java
- src/main/java/org/dsa/structure/queue/IQueue.java
🚧 Files skipped from review as they are similar to previous changes (1)
- pom.xml
🧰 Additional context used
🧬 Code graph analysis (11)
src/main/java/org/dsa/structure/linkedList/deque/Node.java (3)
src/main/java/org/dsa/structure/linkedList/circular/Node.java (1)
Node(28-62)src/main/java/org/dsa/structure/linkedList/doubly/Node.java (1)
Node(17-61)src/main/java/org/dsa/structure/linkedList/simple/Node.java (1)
Node(16-51)
src/main/java/org/dsa/structure/queue/priority/PriorityQueue.java (1)
src/main/java/org/dsa/common/Comparer.java (1)
Comparer(28-67)
src/test/java/org/dsa/common/UtilsTest.java (1)
src/main/java/org/dsa/common/Utils.java (1)
Utils(5-29)
src/main/java/org/dsa/structure/linkedList/sorted/SortedLinkedList.java (3)
src/main/java/org/dsa/common/Comparer.java (1)
Comparer(28-67)src/main/java/org/dsa/structure/linkedList/simple/Node.java (1)
Node(16-51)src/main/java/org/dsa/structure/linkedList/simple/SimpleLinkedList.java (1)
SimpleLinkedList(23-148)
src/main/java/org/dsa/structure/stack/linkedList/StackLinkedList.java (1)
src/main/java/org/dsa/structure/linkedList/simple/Node.java (1)
Node(16-51)
src/main/java/org/dsa/structure/linkedList/simple/Node.java (3)
src/main/java/org/dsa/structure/linkedList/circular/Node.java (1)
Node(28-62)src/main/java/org/dsa/structure/linkedList/deque/Node.java (1)
Node(17-70)src/main/java/org/dsa/structure/linkedList/doubly/Node.java (1)
Node(17-61)
src/main/java/org/dsa/structure/tree/bst/bbt/AVLTest.java (1)
src/main/java/org/dsa/common/Utils.java (1)
Utils(5-29)
src/main/java/org/dsa/Main.java (14)
src/main/java/org/dsa/structure/linkedList/circular/CircularLinkedList.java (1)
CircularLinkedList(28-79)src/main/java/org/dsa/structure/linkedList/deque/DoublyEndedList.java (1)
DoublyEndedList(9-85)src/main/java/org/dsa/structure/linkedList/doubly/DoublyLinkedList.java (1)
DoublyLinkedList(25-92)src/main/java/org/dsa/structure/linkedList/simple/Node.java (1)
Node(16-51)src/main/java/org/dsa/structure/linkedList/simple/SimpleLinkedList.java (1)
SimpleLinkedList(23-148)src/main/java/org/dsa/structure/linkedList/sorted/SortedLinkedList.java (1)
SortedLinkedList(31-65)src/main/java/org/dsa/structure/queue/Queue.java (1)
Queue(11-69)src/main/java/org/dsa/structure/queue/array/QueueArray.java (1)
QueueArray(13-71)src/main/java/org/dsa/structure/queue/linkedList/QueueLinkedList.java (1)
QueueLinkedList(14-85)src/main/java/org/dsa/structure/queue/priority/PriorityQueue.java (1)
PriorityQueue(5-36)src/main/java/org/dsa/structure/stack/array/StackArray.java (1)
StackArray(10-36)src/main/java/org/dsa/structure/stack/linkedList/StackLinkedList.java (1)
StackLinkedList(12-61)src/main/java/org/dsa/structure/tree/bst/BinarySearchTree.java (1)
BinarySearchTree(11-61)src/main/java/org/dsa/structure/tree/bst/bbt/AVLTest.java (1)
AVLTest(5-50)
src/main/java/org/dsa/structure/linkedList/sorted/ISortedLinkedList.java (1)
src/main/java/org/dsa/structure/linkedList/simple/Node.java (1)
Node(16-51)
src/main/java/org/dsa/structure/tree/bst/Node.java (5)
src/main/java/org/dsa/structure/linkedList/circular/Node.java (1)
Node(28-62)src/main/java/org/dsa/structure/linkedList/deque/Node.java (1)
Node(17-70)src/main/java/org/dsa/structure/linkedList/doubly/Node.java (1)
Node(17-61)src/main/java/org/dsa/structure/linkedList/simple/Node.java (1)
Node(16-51)src/main/java/org/dsa/structure/tree/bst/bbt/AVL.java (1)
Node(131-143)
src/main/java/org/dsa/structure/queue/linkedList/QueueLinkedList.java (1)
src/main/java/org/dsa/structure/linkedList/simple/Node.java (1)
Node(16-51)
🔇 Additional comments (31)
src/main/java/org/dsa/sample/stack/BalancedParenthesesCheck.java (1)
1-1: LGTM! Package migration is clean.The package rename from
org.alda.sample.stacktoorg.dsa.sample.stackis straightforward and aligns with the repository-wide namespace migration mentioned in the PR summary.src/main/java/org/dsa/structure/stack/linkedList/IStackLinkedList.java (1)
1-1: All imports updated; no stale references toorg.alda.structure.stack.linkedList.IStackLinkedListremain.src/main/java/org/dsa/structure/linkedList/deque/IDoublyEndedList.java (2)
1-3: LGTM: Namespace migration completed correctly.The package and import declarations have been correctly updated to reflect the new org.dsa namespace. No behavioral changes introduced.
1-3: LGTM!The namespace migration from
org.aldatoorg.dsais consistent with the broader package restructuring across the project.src/main/java/org/dsa/structure/linkedList/deque/Node.java (6)
1-3: LGTM: Namespace migration completed correctly.The package and import declarations have been correctly updated to align with the repository-wide migration to the org.dsa namespace.
47-50: LGTM: Constructor documentation clarified.The JavaDoc now explicitly states that the default constructor creates a node with null data, improving clarity for users of this class.
56-62: LGTM: Print format consistent with other Node implementations.The updated print() method documentation and implementation align with the printing format used in other Node classes (circular, doubly, simple linked lists), ensuring consistent output across different data structures. The newline prefix improves readability when multiple nodes are printed sequentially.
1-3: LGTM!The namespace migration from
org.aldatoorg.dsais consistent with the broader package restructuring.
47-53: LGTM!The updated javadoc clearly documents the default constructor's behavior, explicitly stating that the created node's data, next, and prev references are all
null.
56-69: LGTM!The print method changes improve consistency across the codebase. The newline prefix (line 62) aligns with the printing format used in other Node classes (circular, doubly, and simple linked list nodes), creating a uniform output pattern across all linked list implementations.
src/main/java/org/dsa/structure/stack/array/IStackArray.java (1)
1-1: LGTM! Clean namespace migration.The package declaration update from
org.alda.structure.stack.arraytoorg.dsa.structure.stack.arrayis consistent with the broader refactoring across the repository.src/main/java/org/dsa/structure/queue/array/QueueArray.java (1)
1-3: LGTM! Package and import paths updated correctly.Both the package declaration and the
IQueueimport have been updated to the neworg.dsanamespace, maintaining consistency with the refactoring.src/main/java/org/dsa/structure/stack/array/StackArray.java (1)
1-1: LGTM! Namespace updated correctly.The package declaration has been updated to
org.dsa.structure.stack.array, aligning with the project-wide namespace migration.src/main/java/org/dsa/structure/queue/Queue.java (1)
1-1: LGTM! Package declaration updated.The namespace has been correctly updated to
org.dsa.structure.queue, consistent with the broader refactoring effort.src/main/java/org/dsa/structure/queue/priority/IPriorityQueue.java (1)
1-1: LGTM! Interface namespace updated.The package declaration has been correctly updated to
org.dsa.structure.queue.priority, maintaining consistency across the priority queue module.src/main/java/org/dsa/structure/queue/priority/Node.java (1)
1-1: LGTM! Node class namespace updated.The package declaration has been updated to
org.dsa.structure.queue.priority, aligning with the namespace migration for the priority queue components.src/main/java/org/dsa/common/Comparer.java (1)
1-1: LGTM! Common utility namespace updated.The package declaration has been correctly updated to
org.dsa.common, maintaining consistency across the common utilities module.src/test/java/org/dsa/common/ComparerTest.java (2)
1-1: LGTM! Test namespace updated.The package declaration has been correctly updated to
org.dsa.common, aligning with the namespace migration for the test suite.
1-1: Namespace migration complete. Noorg.alda.references found across all.javafiles.src/main/java/org/dsa/structure/tree/bst/BinarySearchTree.java (1)
1-1: LGTM! Package namespace migration completed.The package path has been successfully updated from
org.alda.structure.tree.bsttoorg.dsa.structure.tree.bst, aligning with the project-wide namespace migration.src/main/java/org/dsa/structure/tree/bst/bbt/RBT.java (1)
1-1: LGTM! Package namespace migration completed.The package path has been successfully updated from
org.alda.structure.tree.bst.bbttoorg.dsa.structure.tree.bst.bbt, aligning with the project-wide namespace migration.src/main/java/org/dsa/structure/linkedList/circular/Node.java (2)
1-3: LGTM! Package and import paths updated.The package and import declarations have been successfully migrated from
org.alda.*toorg.dsa.*, consistent with the project-wide namespace refactoring.
52-61: LGTM! Print behavior standardized with newline prefix.The print() method now prepends a newline before the output, aligning with the print() behavior in other Node implementations (e.g., doubly linked list Node). This standardization improves consistency across data structure output formatting.
src/main/java/org/dsa/structure/linkedList/sorted/ISortedLinkedList.java (1)
1-4: LGTM! Package and import paths updated.The package and import declarations have been successfully migrated from
org.alda.*toorg.dsa.*, maintaining consistency with the project-wide namespace refactoring.src/main/java/org/dsa/structure/linkedList/doubly/DoublyLinkedList.java (2)
1-3: LGTM! Package and import paths updated.The package and import declarations have been successfully migrated from
org.alda.*toorg.dsa.*, consistent with the project-wide namespace refactoring.
81-91: LGTM! Print behavior refined for cleaner output.The print() method now relies solely on each node's print() implementation without inserting extra newlines between nodes. This produces more compact output and is consistent with the print behavior in other linked list implementations.
src/main/java/org/dsa/structure/linkedList/doubly/Node.java (2)
1-3: LGTM! Package and import paths updated.The package and import declarations have been successfully migrated from
org.alda.*toorg.dsa.*, consistent with the project-wide namespace refactoring.
17-60: LGTM! Printable interface implemented with clear formatting.The Node now implements Printable with a well-documented print() method that displays the node's data along with adjacent node information. The format (prepending newline, conditional next/prev output) is consistent with other Node implementations in the codebase.
src/main/java/org/dsa/structure/linkedList/circular/CircularLinkedList.java (2)
1-3: LGTM! Package and import paths updated.The package and import declarations have been successfully migrated from
org.alda.*toorg.dsa.*, consistent with the project-wide namespace refactoring.
66-78: LGTM! Print documentation clarified.The print() method documentation now clearly describes the traversal behavior (from head until looping back). The implementation correctly handles circular traversal with the break condition when
current == head.src/main/java/org/dsa/structure/linkedList/deque/DoublyEndedList.java (1)
76-76: LGTM!The updated javadoc clearly describes the print method's behavior.
| /** | ||
| * Set the list's tail node. | ||
| * | ||
| * @param tail the node to use as the new last element of the list, or `null` to indicate there is no tail | ||
| */ | ||
| public void setTail(Node<T> tail) { | ||
| this.tail = tail; | ||
| } |
There was a problem hiding this comment.
Document preconditions or add validation to prevent list corruption.
The setTail method allows direct modification of the tail reference without validating that the node is properly connected to the list or that prev/next pointers maintain doubly-linked invariants. This could corrupt the list structure if misused.
Consider one of the following:
- Add precondition documentation stating that the caller must ensure the node is properly linked
- Add validation logic to verify the node is reachable from the head
- Make this method package-private if it's only needed internally
Example documentation enhancement:
/**
* Set the list's tail node.
*
+ * <p><b>Precondition:</b> The provided node must be properly connected to the list
+ * (i.e., reachable from the head via next pointers and have its prev pointer set correctly).
+ * Violating this precondition will corrupt the list structure.</p>
+ *
* @param tail the node to use as the new last element of the list, or `null` to indicate there is no tail
*/📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| /** | |
| * Set the list's tail node. | |
| * | |
| * @param tail the node to use as the new last element of the list, or `null` to indicate there is no tail | |
| */ | |
| public void setTail(Node<T> tail) { | |
| this.tail = tail; | |
| } | |
| /** | |
| * Set the list's tail node. | |
| * | |
| * <p><b>Precondition:</b> The provided node must be properly connected to the list | |
| * (i.e., reachable from the head via next pointers and have its prev pointer set correctly). | |
| * Violating this precondition will corrupt the list structure.</p> | |
| * | |
| * @param tail the node to use as the new last element of the list, or `null` to indicate there is no tail | |
| */ | |
| public void setTail(Node<T> tail) { | |
| this.tail = tail; | |
| } |
🤖 Prompt for AI Agents
In src/main/java/org/dsa/structure/linkedList/deque/DoublyEndedList.java around
lines 66-73, setTail currently assigns the tail reference directly which can
break list invariants; either document a clear precondition that the caller must
pass a node already in this list (or null) and that node.next must be null and
its prev chain must ultimately reach the head, or enforce validation in the
method: if tail != null verify tail.next == null and walk prev pointers to
confirm reachability from this.head before assigning, otherwise throw
IllegalArgumentException; alternately, if only used internally, change the
method visibility to package-private to prevent external misuse.
Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>
Create summarize_new_issue.yaml
There was a problem hiding this comment.
Actionable comments posted: 2
🧹 Nitpick comments (1)
.github/workflows/summarize_new_issue.yaml (1)
15-17: Drop the unused checkout step.The job never reads repository files, so
actions/checkout@v4just burns time and bandwidth. You can remove it to shave ~5‑10s off every run.
📜 Review details
Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro
📒 Files selected for processing (5)
.github/workflows/codeql.yaml(1 hunks).github/workflows/label_pr.yaml(1 hunks).github/workflows/maven.yaml(1 hunks).github/workflows/pmd.yaml(1 hunks).github/workflows/summarize_new_issue.yaml(1 hunks)
🧰 Additional context used
🪛 actionlint (1.7.7)
.github/workflows/label_pr.yaml
20-20: the runner of "actions/labeler@v4" action is too old to run on GitHub Actions. update the action's version to fix this issue
(action)
Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>
|
This pull request sets up GitHub code scanning for this repository. Once the scans have completed and the checks have passed, the analysis results for this pull request branch will appear on this overview. Once you merge this pull request, the 'Security' tab will show more code scanning analysis results (for example, for the default branch). Depending on your configuration and choice of analysis tool, future pull requests will be annotated with code scanning analysis results. For more information about GitHub code scanning, check out the documentation. |
![github-advanced-security[bot]](https://avatars.githubusercontent.com/in/57789?s=60&v=4){kind=small}
There was a problem hiding this comment.
PMD found more than 20 potential problems in the proposed changes. Check the Files changed tab for more details.
Summary by CodeRabbit
New Features
Bug Fixes
Documentation
Tests
Chores