java类的定义属性方法

package com.bjsxt.test3;public class SxtStu {//属性int id;String sname;int age;//方法void study() {System.out.println("我在学习&＃xff0c;正在敲代码&＃xff0c;正在听课&＃xff01;&＃xff01;不要打扰我&＃xff01;");}//构造方法(方法名和类名保持一致&＃xff01;)SxtStu(){}public static void main(String[] args){SxtStu s1 &＃61; new SxtStu();System.out.println(s1.id);System.out.println(s1.sname);s1.id &＃61; 1001;s1.sname1 &＃61; "靓仔";System.out.println(s1.id);System.out.println(s1.sname);}}