[求助] 如何在内部类里调用内部类自身的成员变量？

[qq-dabins]

class Father {
int id;
class Son {
int id;
void changeId() {
id = 10;
}
}
}

请问内部类Son里的changeId方法是给Father的id赋值？还是Son的id ?
如果是给Father的id赋值，那么如何在changeId方法中调用Son的id呢 ？

[bootupnow]

对比一下，就清楚了，看看讲内部类的章节吧。

public class Father {
	int id = 1;

	class Son {
		int id = 2;

		void changeId() {
			id = 10;
			System.out.println("Son's = " + id);
			
			Father.this.id = 20;
			System.out.println("Father's id = " + Father.this.id);
		}
	}
	
	public void show(){
		Son s = new Son();
		s.changeId();
	}
	
	public static void main(String[] args){
		Father f = new Father();
		f.show();	
	}
}

[jdlsfl]

class Son {
int id;
void changeId() {
id = 10;
}
这个只是改变Son的id

Father的id在Son类中要用这样的方法：Father.this.id


楼上正解

[pengdayong]

class Fa {
int id=2;
class Son {
int id=3;
void changeId() {
id = 10;
}
}
}

class Father{

public static void main(String []args){
Fa fa = new Fa();

Fa.Son son = fa.new Son();
System.out.println(fa.id);//2
fa.id = 5;
System.out.println(fa.id);//5
System.out.println(son.id);//3
System.out.println("///////");
son.changeId();
System.out.println(fa.id);//5
System.out.println(son.id);//10

}
}

[qq278095755]

1楼正解

[anqini]

package csdn;

import java.util.ArrayList;
import java.util.HashMap;

public class Father { 
	  int id=1; 
	  class Son { 
	    int id; 
	    void changeId() { 
	    	this.id = 10; //这里引用是指s
	    	Father.this.id = 20;/这里指的是f引用!
	    } 
	  } 
	  public static void main(String[] args) {
		  Father f = new Father();
		  
		  Father.Son s =  f.new Son();
		  s.changeId();

		  System.out.println(s.id);
		  System.out.println(f.id);
	  }
} 

这个程序很明确的,

[KKK2007]

改变的是son的id