8268764: Use Long.hashCode() instead of int-cast where applicable

Reviewed-by: kevinw, prr, kizune, serb

src/java.desktop/share/classes/com/sun/media/sound/DLSSoundbank.java

@@ -105,7 +105,7 @@ public static DLSID read(RIFFReader riff) throws IOException {
 
         @Override
         public int hashCode() {
-            return (int)i1;
+            return Long.hashCode(i1);
         }
 
         @Override

src/java.desktop/share/classes/com/sun/media/sound/WaveExtensibleFileReader.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2007, 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2007, 2021, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -91,7 +91,7 @@ public static GUID read(RIFFReader riff) throws IOException {
 
         @Override
         public int hashCode() {
-            return (int) i1;
+            return Long.hashCode(i1);
         }
 
         @Override

src/java.rmi/share/classes/java/rmi/server/ObjID.java

@@ -199,8 +199,9 @@ public static ObjID read(ObjectInput in) throws IOException {
      *
      * @return  the hash code value for this object identifier
      */
+    @Override
     public int hashCode() {
-        return (int) objNum;
+        return Long.hashCode(objNum);
     }
 
     /**

src/jdk.internal.vm.ci/share/classes/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotResolvedJavaMethodImpl.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2011, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2011, 2021, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -175,7 +175,7 @@ public boolean equals(Object obj) {
 
     @Override
     public int hashCode() {
-        return (int) getMetaspaceMethod();
+        return Long.hashCode(getMetaspaceMethod());
     }
 
     /**

src/jdk.jdi/share/classes/com/sun/tools/jdi/FieldImpl.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1998, 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1998, 2021, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -51,8 +51,9 @@ public boolean equals(Object obj) {
         }
     }
 
+    @Override
     public int hashCode() {
-        return (int)ref();
+        return Long.hashCode(ref());
     }
 
     public int compareTo(Field field) {

src/jdk.jdi/share/classes/com/sun/tools/jdi/MethodImpl.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1998, 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1998, 2021, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -95,8 +95,9 @@ public boolean equals(Object obj) {
         }
     }
 
+    @Override
     public int hashCode() {
-        return (int)ref();
+        return Long.hashCode(ref());
     }
 
     public final List<Location> allLineLocations()

src/jdk.jdi/share/classes/com/sun/tools/jdi/ObjectReferenceImpl.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1998, 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1998, 2021, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -155,8 +155,9 @@ public boolean equals(Object obj) {
         }
     }
 
+    @Override
     public int hashCode() {
-        return(int)ref();
+        return Long.hashCode(ref());
     }
 
     public Type type() {

src/jdk.jdi/share/classes/com/sun/tools/jdi/ReferenceTypeImpl.java

@@ -150,8 +150,9 @@ public boolean equals(Object obj) {
         }
     }
 
+    @Override
     public int hashCode() {
-        return(int)ref();
+        return Long.hashCode(ref());
     }
 
     public int compareTo(ReferenceType object) {

src/jdk.security.auth/share/classes/com/sun/security/auth/NTNumericCredential.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2021, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -100,7 +100,8 @@ public boolean equals(Object o) {
      *
      * @return a hash code for this {@code NTNumericCredential}.
      */
+    @Override
     public int hashCode() {
-        return (int)this.impersonationToken;
+        return Long.hashCode(this.impersonationToken);
     }
 }