Java Integer和int

 public static void main(String[] args){        Integer a=100;//当值为-128-127的时候不会new对象        Integer b=100;        Integer c=150;//值会new对象        Integer d=150;        System.out.println(a==b);//ture        System.out.println(c==d);//false        Integer e =new Integer(100);        Integer f=100;        int g=100;        System.out.println(e==f);//false        System.out.println(e==g);//ture        System.out.println(f==g);//true    }