自增自减

自增自减测试

测试1

public class T {
    public static void main(String[] args) {
        int a = 3;
        int b = a++;//执行这行代码，先给b赋值，a再自增
        //a = a + 1;
        //a = a + 1;
        int c = ++a;//执行这行代码，a先自增，再给b赋值
        System.out.println(a + "____" + b + "____" + c);//5____3____5
    }
}