Java this关键字用法

我会带着你远行 2022-05-18 08:36 270阅读 0赞

1.调用属性（代码示例）

public class thisDemo01 \{  
    public static void main(String\[\] args) throws Exception \{  
        BlueMoon bm=new BlueMoon("渣渣辉", 100);  
        System.out.println(bm.getInfo());  
    \}  
\}  
   
class BlueMoon \{  
    private String name;  
    private int level;  
   
    public BlueMoon(String name, int level) \{  
        this.name = name;  
        this.level = level;  
    \}  
   
    public String getInfo() \{  
        return "大家好!我是" + this.name + "，我是贪玩蓝月的战士，等级：" + this.level;  
    \}  
\}

2.调用方法(普通方法与构造方法)

|—调用普通方法:

public class thisDemo01 \{  
    public static void main(String\[\] args) throws Exception \{  
        BlueMoon bm = new BlueMoon("渣渣辉", 100);  
        System.out.println(bm.getInfo());  
    \}  
\}  
   
class BlueMoon \{  
    private String name;  
    private int level;  
   
    public BlueMoon(String name, int level) \{  
        this.name = name;  
        this.level = level;  
    \}  
   
    public void print() \{  
        System.out.println("\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*");  
    \}  
   
    public String getInfo() \{  
        this.print();//调用普通方法  
        return "大家好!我是" + this.name + "，我是贪玩蓝月的战士，等级：" + this.level;  
    \}  
\}

|— 调用构造方法:

public class thisDemo01 \{  
    public static void main(String\[\] args) throws Exception \{  
        BlueMoon bm1 = new BlueMoon();  
        BlueMoon bm2 = new BlueMoon("古天乐");  
        BlueMoon bm3 = new BlueMoon("小志传奇", "陈赫", "法师");  
   
        System.out.println(bm1.getInfo());  
        System.out.println(bm2.getInfo());  
        System.out.println(bm3.getInfo());  
    \}  
\}  
   
class BlueMoon \{  
    private String game;  
    private String name;  
    private String title;  
    private int level;  
   
    public BlueMoon() \{  
        this("贪玩蓝月", "无名氏", "未定", 0);  
    \}  
   
    public BlueMoon(String name) \{  
        this("贪玩蓝月", name, "剑士", 90);  
    \}  
   
    public BlueMoon(String game, String name) \{  
        this(game, name, "战士", 100);  
    \}  
   
    public BlueMoon(String game, String name, String title) \{  
        this();  
        this.game = game;  
        this.name = name;  
        this.title = title;  
    \}  
   
    public BlueMoon(String game, String name, String title, int level) \{  
        this.game = game;  
        this.name = name;  
        this.title = title;  
        this.level = level;  
    \}  
   
    public String getInfo() \{  
        return "欢迎来到" + this.game + "！我是" + this.name + ",职业:" + this.title + ",等级:" + this.level + "级";  
    \}  
\}

3.当前对象调用:

class BlueMoon \{  
    public void print() \{  
        //哪个对象调用了print()方法,this就自动与此对象指向同一块内存地址  
        System.out.println("this=" + this);//this 就是当前调用对象  
    \}  
\}  
   
public class thisDemo02 \{  
    public static void main(String\[\] args) throws Exception \{  
        BlueMoon bm = new BlueMoon();  
        BlueMoon bm2 = new BlueMoon();  
        System.out.println("bm=" + bm);  
        bm.print();  
        System.out.println("---------------------");  
        System.out.println("bm2=" + bm2);  
        bm.print();  
   
    \}  
\}  
![SouthEast][]

转载地址：[https://blog.csdn.net/ikv1989/article/details/79182432][https_blog.csdn.net_ikv1989_article_details_79182432]

[SouthEast]: /images/20220518/f3758efc022341019dfb6cd2d5bcccbb.png
[https_blog.csdn.net_ikv1989_article_details_79182432]: https://blog.csdn.net/ikv1989/article/details/79182432