Java basic data Type 127 critical point for boxing

1  PackageWrapper.demo;2 3  Public classWrapperdemo4 {5 6     /**7      * @paramargs8      */9      Public Static voidMain (string[] args)Ten     { One          A         //after JDK1.5, automatic boxing, if the boxed is a byte, then the data will be shared, will not re-open new space -Integer A = 127;  -Integer B = 127; theSystem.out.println (A = = B);//true -System.out.println (A.equals (b));//true -          -Integer C = 128;  +Integer d = 128; -System.out.println (c = = d);//false +System.out.println (C.equals (d));//true A           atInteger x =NewInteger (127); -Integer y =NewInteger (127); -SYSTEM.OUT.PRINTLN (x = = y);//false, because = = is the comparison object address, two new, obviously the address is not the same -System.out.println (X.equals (y));//true, overriding the Equals method, only comparing the values for equality, apparently equal -          -     } in  -}

Java basic data Type 127 critical point for boxing