src/share/classes/com/sun/tools/javac/code/Types.java

*** 1315,1324 ****
--- 1315,1339 ----
          }
          return ts.isEmpty() && ss.isEmpty();
      }
      // </editor-fold>
  
+     /**
+      * Can t and s be compared for equality?
+      *
+      */
+     public boolean isEqualityComparable(Type s, Type t, Warner warn) {
+         boolean tPrimitive = t.isPrimitive();
+         boolean sPrimitive = s.isPrimitive();
+         if (tPrimitive && sPrimitive) {
+             return isSubtype(s, t) || isSubtype(t, s);   
+         } else if (!tPrimitive && !sPrimitive) {
+             return isCastable(s, t, warn) || isCastable(t, s, warn);
+         } else
+             return false;
+     }
+ 
      // <editor-fold defaultstate="collapsed" desc="isCastable">
      public boolean isCastable(Type t, Type s) {
          return isCastable(t, s, noWarnings);
      }