透析Java本质-交换变量的几种方式

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package com.java.essence_36;import java.lang.reflect.InvocationTargetException;import java.lang.reflect.Method;/** * Created by lw on 14-5-18. * <p/> * 交换变量的几种方式 */public class Replace {    //临时变量-赋值交换    private static void temp_Replace(V v) {        int temp = v.a;        v.a = v.b;        v.b = temp;        System.out.println("temp_Replace(V v)->" + v);    }    //临时变量—相加    private static void add_temp_Replace(V v) {        int temp = v.a + v.b;        v.a = temp - v.a;        v.b = temp - v.b;        System.out.println("add_temp_Replace(V v)->" + v);    }    //临时变量-相减    private static void sub_temp_Replace(V v) {        int temp = v.a - v.b;        v.a = v.a - temp;        v.b = v.b + temp;        System.out.println("sub_temp_Replace(V v)->" + v);    }    //异或运算，即a=a^b^b;    private static void yihuo_Replace(V v) {        v.a = v.a ^ v.b;        v.b = v.a ^ v.b;        v.a = v.a ^ v.b;        System.out.println("yihuo_Replace(V v)->" + v);    }    public static void main(String[] args){        temp_Replace(new V(1, 2));        add_temp_Replace(new V(1, 2));        sub_temp_Replace(new V(1, 2));        yihuo_Replace(new V(1, 2));    }}class V {    int a, b;    V(int a, int b) {        this.a = a;        this.b = b;        System.out.println("初始化-V{" +                "a=" + a +                ", b=" + b +                '}');    }    @Override    public String toString() {        return "替换后-V{" +                "a=" + a +                ", b=" + b +                '}';    }}
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