package com.xu.operator;

public class Demo07 {
    public static void main(String[] args) {
        int a=10;
        int b=20;
        a+=b;//a=a+b
        System.out.println(a);//30
        System.out.println(b);//20
        a-=b;//a=a-b
        System.out.println(a);//10
        System.out.println(b);//20
        //字符串连接符  + string
        System.out.println(""+a+b);//1020,字符串在前面，后面的进行拼接；
        System.out.println(a+b+"");//30,字符串在后面，前面的依旧进行运算；



    }
}

\Desktop\JavaSE\out\production\基础语法" com.xu.operator.Demo07
30
20
10
20
1020
30

Process finished with exit code 0