java 关键字this例题

//boy类
package onMarch31day10;


 class  Boy{
    private String name;
    private int age;

    public Boy(String name,int age){
        this.name=name;
        this.age=age;
    }

    public void setName(String name) {
        this.name = name;
    }
    public String getName() {
        return name;
    }

    public void setAge(int age) {
        this.age = age;
    }
    public int  getAge(){
        return age;
    }
    public void marry(Girl girl){
        System.out.println("我也喜欢"+girl.getName());
    }
    public void shout() {
        if(this.age>=22){
            System.out.println("可以结婚了");
        }
        else{
            System.out.println("年龄未满22岁，不能结婚，再谈谈恋爱去吧");
        }

    }
}

//girl类
package onMarch31day10;

import java.awt.*;

public class Girl {

    private String name;
    private int age;

    public Girl(String name,int age){
        this.name=name;
        this.age=age;
    }
    public void setName(String name) {
        this.name = name;
    }

    public String getName() {
        return name;
    }
    public void marry(Boy boy) {
        System.out.println("我想要嫁给"+boy.getName());
        boy.marry(this);
    }
}

//BoyGirlTest类
package onMarch31day10;

import java.sql.SQLOutput;
import java.util.Scanner;

public class BoyGirlTest {
    public static void main(String[] args) {
        System.out.println("女孩，输入你的名字：");
        Scanner scan =new Scanner(System.in);
        String girlname =scan.next();
        System.out.println(girlname+"，输入你的年龄：");
        int girlage =scan.nextInt();
        System.out.println(girlname+"，你喜欢谁（输入他名字）：");
        String boyname =scan.next();
        System.out.println(girlname+"他多大了？：");
        int boyage =scan.nextInt();
        Boy boy =new Boy(boyname,boyage);
        boy.shout();

        Girl girl =new Girl(girlname,girlage);
        girl.marry(boy);
    }
}