面向对象编程的初步演示

package com.lxk.jsu;

//定义了一个名为MyGirlFriend的类
class MyGirlFriend {

    //定义属性，成员变量
    private String name;
    private int age;
    private String sex;

    //有参构造方法
    public MyGirlFriend(String name, int age, String sex) {
        this.name = name;
        this.age = age;
        this.sex = sex;
    }

    //说话方法
    public void say() {
        System.out.println(this.name+" :爱意随风起，风止意难平，遗憾终究是遗憾。");
    }
}

主程序

package com.lxk.jsu;

//在主程序中使用MyGirlFriend类
public class RunDemo {
    public static void main(String[] args){
        //给自己一个野生的女朋友
        MyGirlFriend myGirlFriend = new MyGirlFriend("流莹", 18, "女");
        //让她说话
        myGirlFriend.say();
    }
}

输出：

E:\develop\Java\jdk-17\bin\java.exe "-javaagent:E:\idea\IntelliJ IDEA Community Edition 2023.3.4\lib\idea_rt.jar=55052:E:\idea\IntelliJ IDEA Community Edition 2023.3.4\bin" -Dfile.encoding=UTF-8 -classpath E:\code\stduy1\out\production\stduy1 com.lxk.jsu.RunDemo
流莹 :爱意随风起，风止意难平，遗憾终究是遗憾。

Process finished with exit code 0

作者本人也是初学，希望能和各位一同进步!