Integer简介

概述// 当创建范围为[-128,127]时 Integer a = 1; Integer b = 1; Integer c = new Integer(1); System.out.println("a == b :" + (a == b)); System.out.println("a == c :

//      当创建范围为[-128,127]时        Integer a = 1;        Integer b = 1;        Integer c = new Integer(1);        System.out.println("a == b :" + (a == b));        System.out.println("a == c :" + (a == c));        System.out.println();//      当创建范围不为[-128,127]时        Integer d = 128;        Integer e = 128;        Integer f = new Integer(128);        System.out.println("d == e :" + (d == e));        System.out.println("d == f :" + (d == f));        System.out.println("d e f 互不相等(false为正确测试结果)：" + (d == e || d == f || e == f));        System.out.println();//      包装类均为值传递        Integer g = 0;        Integer h = new Integer(130);        Test1(g);        Test2(h);        System.out.println("g = "+g);        System.out.println("h = "+h);    }    static voID Test1(Integer t) {        t = 1;        System.out.println("Test1内:  t = " + t);    }    static voID Test2(Integer t) {        t = 131;        System.out.println("Test2内:  t = " + t);    }}原文：https://blog.csdn.net/Cactus_Lrg/article/details/81489299 

测试结果如下：

a == b :true
a == c :false

d == e :false
d == f :false
d e f 互不相等(false为正确测试结果)：false

Test1内: t = 1
Test2内: t = 131
g = 0
h = 130

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