Java this关键字(调用属性，调用方法，调用当前对象)

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this关键字主要有三个应用：

应用

调用属性(代码示例):

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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;
	}
}

调用方法(普通方法与构造方法)

  • 调用普通方法:

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    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:

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    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";
    	}
    }

当前对象调用:

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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();
 
	}
}

参考文献

https://blog.csdn.net/yanwenwennihao/article/details/79375611
https://blog.csdn.net/ikv1989/article/details/79182432