The key word "this" in java.

今天早上突然想起来java中有个key word叫this,以前都没怎么注意，于是写下帮助记忆。

package org.iteye.bbjava.thistest;

public class ThisTest {
	private String thisStr="The key word 'this'!";
	public ThisTest(){
		
	}
	
	//this引用构造方法
	public ThisTest(String thisStr){
		this();
		this.thisStr=thisStr;//特别指出，当前使用的是实列变量，而不是静态变量或局部变量。
	}
	public ThisTest(UseThisTest utt){
		System.out.println("Hello!my name is "+utt);
	}
	
	//
	public void test(){
		System.out.println(this.thisStr);
		System.out.println("The key word 'this' in the ThisTest class:  "+this);
	}
	
	//返回当前实列
	public ThisTest returnMyself(){
		return this;
	}
	
	
	public static void main(String []args){
		ThisTest tt=new ThisTest();
		tt.test();
		System.out.println("returnMyself:"+tt.returnMyself());
	}
}

output

引用

The key word 'this'!
The key word 'this' in the ThisTest class:  org.iteye.bbjava.thistest.ThisTest@de6ced
returnMyself:org.iteye.bbjava.thistest.ThisTest@de6ced

package org.iteye.bbjava.thistest;

public class UseThisTest {
	private ThisTest tt = new ThisTest();
	
	public void test(){
		System.out.println("Do nothing!");
	}
	public void callTest(){
		
		ThisTest utt1 = new ThisTest(this);//把当前对象作为参数传传递。
		this.tt.test();
		System.out.println("The key word 'this' in  the UseThisTest class:"+this);
	}
	public static void main(String []args0){
		UseThisTest utt = new UseThisTest();	
		utt.test();
		utt.callTest();
	}
}

output:

引用

Do nothing!
Hello!my name is org.iteye.bbjava.thistest.UseThisTest@c17164
The key word 'this'!
The key word this in ThisTest:org.iteye.bbjava.thistest.ThisTest@1fb8ee3
The key word 'this' in the UseThisTest class:org.iteye.bbjava.thistest.UseThisTest@c17164