1.5jdk一下
*****************Integer a = 100; 不相当于 Integer a = value.of(100);
Integer a = value.of(127);//(-128 - 127) Integer b= value.of(127);//(-128 - 127) System.out.print(a==b); System.out.print(a.equals(b));
结果是:truetrue
Integer a = value.of(128); Integer b= value.of(128); System.out.print(a==b); System.out.print(a.equals(b));
结果是:falsetrue
1.5jdk以上
****************Integer a = 100; 相当于 Integer a = value.of(100);
Integer a = 127;//(-128 - 127) Integer b= 127;//(-128 - 127) System.out.print(a==b); System.out.print(a.equals(b));
结果是:truetrue
Integer a = 130; Integer b= 130; System.out.print(a==b); System.out.print(a.equals(b));
结果是:falsetrue