8170432: Class java.util.UUID & @OverRide

Reviewed-by: dfuchs, lancea

src/java.base/share/classes/java/util/UUID.java

@@ -456,6 +456,7 @@ public long node() {
      *
      * @return  A string representation of this {@code UUID}
      */
+    @Override
     public String toString() {
         return jla.fastUUID(leastSigBits, mostSigBits);
     }
@@ -465,6 +466,7 @@ public String toString() {
      *
      * @return  A hash code value for this {@code UUID}
      */
+    @Override
     public int hashCode() {
         long hilo = mostSigBits ^ leastSigBits;
         return ((int)(hilo >> 32)) ^ (int) hilo;
@@ -482,6 +484,7 @@ public int hashCode() {
      * @return  {@code true} if the objects are the same; {@code false}
      *          otherwise
      */
+    @Override
     public boolean equals(Object obj) {
         if ((null == obj) || (obj.getClass() != UUID.class))
             return false;
@@ -506,6 +509,7 @@ public boolean equals(Object obj) {
      *          greater than {@code val}
      *
      */
+    @Override
     public int compareTo(UUID val) {
         // The ordering is intentionally set up so that the UUIDs
         // can simply be numerically compared as two numbers