重写toString方法输出对象信息

class persion {String name;int age;public persion() {}public persion(String name, int age) {super();this.name = name;this.age = age;}public String toString() {return this.name + "-" + this.age;}}public class Demo1 {public static void main(String[] args) {persion p = new persion("王五", 19);System.err.println(p);}}