?? sample.java
字號(hào):
package inherit;
class Outer{
private int a;
public Outer(int a){this.a=a;}
class Inner{
public Inner(){}
public void print(){System.out.println("a="+a);} //訪問(wèn)外部類的實(shí)例變量a
}
}
public class Sample extends Outer.Inner{
//public Sample(){} //編譯錯(cuò)誤
public Sample(Outer o){
o.super();
}
public static void main(String args[]){
Outer outer1=new Outer(1);
Outer outer2=new Outer(2);
Outer.Inner in=outer1.new Inner();
in.print();
Sample s1=new Sample(outer1);
Sample s2=new Sample(outer2);
s1.print(); //打印a=1
s2.print(); //打印a=2
}
}
/****************************************************
* 作者:孫衛(wèi)琴 *
* 來(lái)源:<<Java面向?qū)ο缶幊?gt;> *
* 技術(shù)支持網(wǎng)址:www.javathinker.org *
***************************************************/
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