Java 包装类Integer的值比较

对于包装类型Integer的值比较与int的值比较是不同的；

 

public class Java_Val_Compare {    public static void main(String[] args) {        Integer a1 = 127;        Integer a2 = 127;        System.out.println("a1==a2?:\t"+(a1==a2));                Integer b1 = 128;        Integer b2 = 128;        System.out.println("b1==b2?:\t"+(b1==b2));            System.out.println("b1.intValue()==b2.intValue()?:\t"        +(b1.intValue()==b2.intValue()));    }}

执行结果: