两个Integer对象是否 其机制与String是类似的Integer a 5Integer b 5 System.out.println(a b)
两个Integer对象是否 == 其机制与String是类似的
Integer a = 5;Integer b = 5; System.out.println(a == b); // true.Integer c = new Integer(5);Integer d = new Integer(5);System.out.println(c == d); // false.
