Java中的this

this

this可以看成是自身的一个引用，和python中的self有一些相似
用法1，区分成员名字

public class Example {
	private final int arg1;
	private final int arg2;
	
	public Example(int arg1, int arg2) {
		this.arg1 = arg1;
		this.arg2 = arg2;
	}
	public void method1() {
		System.out.println("This's method1");
	}
	public void method2() {
		this.method1();
		System.out.println("This's method2");
	}
	...
}

用法二自身引用，这里举一个线程锁的例子

public class MyThread implements Runnable {
	...
	
	public void myMethod() {
		...
		synchronized(this) {
			...
		}
		...
	}
	...
}

3 构造时重载其他Creater

public class Example {
	private final String name;
	private final int arg1;
	private final int arg2;
	
	public Example(String name, int arg1) {
		this.name = name;
		this.arg1 = arg1;
	}
	
	public Example(int arg2) {
		this("nothing", 100); //这一句必须时第一行
		this.arg2 = arg2;
	}
	
	...
}

Over!