jme3-core: solve 10 javadoc diagnostics from JDK 11 (#1646)

* solve 3 JDK 11 javadoc warnings "@return has already been specified"

* solve 7 JDK 11 javadoc errors "tag not supported..."

Author: stephengold

jme3-core/src/main/java/checkers/quals/DefaultLocation.java

@@ -15,8 +15,8 @@ public enum DefaultLocation {
     ALL_EXCEPT_LOCALS,
 
     /** Apply default annotations to unannotated upper bounds:  both
-     * explicit ones in <tt>extends</tt> clauses, and implicit upper bounds
-     * when no explicit <tt>extends</tt> or <tt>super</tt> clause is
+     * explicit ones in <code>extends</code> clauses, and implicit upper bounds
+     * when no explicit <code>extends</code> or <code>super</code> clause is
      * present. */
     // Especially useful for parameterized classes that provide a lot of
     // static methods with the same generic parameters as the class.

jme3-core/src/main/java/com/jme3/bounding/BoundingSphere.java

@@ -382,8 +382,7 @@ public void averagePoints(Vector3f[] points) {
      *            the transform to apply
      * @param store
      *            sphere to store result in
-     * @return BoundingVolume
-     * @return ref
+     * @return either store or a new BoundingSphere
      */
     @Override
     public BoundingVolume transform(Transform trans, BoundingVolume store) {

jme3-core/src/main/java/com/jme3/effect/ParticleEmitter.java

@@ -870,7 +870,6 @@ public void setInitialVelocity(Vector3f initialVelocity) {
     }
 
     /**
-     * @return the velocity variation
      * @deprecated
      * This method is deprecated.
      * Use ParticleEmitter.getParticleInfluencer().getVelocityVariation(); instead.

jme3-core/src/main/java/com/jme3/input/Input.java

@@ -77,8 +77,6 @@ public interface Input {
     /**
      * @return The current absolute time as nanoseconds. This time is expected
      * to be relative to the time given in InputEvents time property.
-     *
-     * @return the current time (in nanoseconds)
      */
     public long getInputTimeNanos();
 }

jme3-core/src/main/java/com/jme3/math/FastMath.java

@@ -846,8 +846,7 @@ public static float determinant(double m00, double m01, double m02,
     /**
      * Returns a random float between 0 and 1.
      *
-     * @return A random float between <tt>0.0f</tt> (inclusive) to
-     * <tt>1.0f</tt> (exclusive).
+     * @return a random float between 0 (inclusive) and 1 (exclusive)
      */
     public static float nextRandomFloat() {
         return rand.nextFloat();
@@ -858,8 +857,7 @@ public static float nextRandomFloat() {
      *
      * @param min the desired minimum value
      * @param max the desired maximum value
-     * @return A random int between <tt>min</tt> (inclusive) to
-     * <tt>max</tt> (inclusive).
+     * @return a random int between min (inclusive) and max (inclusive)
      */
     public static int nextRandomInt(int min, int max) {
         return (int) (nextRandomFloat() * (max - min + 1)) + min;