8356605: JRSUIControl.hashCode and JRSUIState.hashCode can use Long.hashCode

Reviewed-by: prr, serb

Author: wenshao

src/java.desktop/macosx/classes/apple/laf/JRSUIControl.java

@@ -324,7 +324,7 @@ private void sync() {
 
     @Override
     public int hashCode() {
-        int bits = (int)(currentEncodedProperties ^ (currentEncodedProperties >>> 32));
+        int bits = Long.hashCode(currentEncodedProperties);
         bits ^= nativeMap.hashCode();
         bits ^= changes.hashCode();
         return bits;

src/java.desktop/macosx/classes/apple/laf/JRSUIState.java

@@ -90,7 +90,7 @@ public boolean is(Property property) {
 
     @Override
     public int hashCode() {
-        return (int)(encodedState ^ (encodedState >>> 32)) ^ getClass().hashCode();
+        return Long.hashCode(encodedState) ^ getClass().hashCode();
     }
 
     public static class AnimationFrameState extends JRSUIState {
@@ -183,8 +183,7 @@ public boolean equals(final Object obj) {
 
         @Override
         public int hashCode() {
-            final long bits = Double.doubleToRawLongBits(value);
-            return super.hashCode() ^ (int)bits ^ (int)(bits >>> 32);
+            return super.hashCode() ^ Double.hashCode(value);
         }
     }
 
@@ -258,7 +257,7 @@ public boolean equals(final Object obj) {
         @Override
         public int hashCode() {
             final long bits = Double.doubleToRawLongBits(thumbProportion) ^ Double.doubleToRawLongBits(thumbStart);
-            return super.hashCode() ^ (int)bits ^ (int)(bits >>> 32);
+            return super.hashCode() ^ Long.hashCode(bits);
         }
     }
 }