Java內嵌類

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1.1.


內嵌類

1.1.1.



代碼

/*

 
* To
change this template, choose Tools | Templates

 
*
and open the template in the editor.

 
*/

 

package javatutorials;

 

/**

 
*

 
*
@author wanpor

 
*/

public class InnerClass {

 

   

public static void main(String[] args){

       

//
建立靜態內嵌類

       

InnerClass.A ica
= new InnerClass.A();

       

ica.printInfo();

       

       

//
建立非靜態內嵌類

       

InnerClass b = new InnerClass();

       

InnerClass.B icb = b.new B();

       

icb.printInfo();

   
}

   

//
靜態內嵌類

   

public static class A{

       

static void printInfo(){

           

System.out.println("A");

       

}

   
}

   

//
非靜態內嵌類

   

public class B{

       

void printInfo(){

           

System.out.println("B");

       

}

   
}

}

 

1.1.2.



說明

1.      



定義靜態內嵌類；

2.      



定義非靜態內嵌類

3.      



建立靜態內嵌類對象

4.      



建立非靜態內嵌類對象

 

靜態類不能執行個體化，類的成員都要是靜態成員和靜態方法，

非靜態類一般需要執行個體化後才可以操作，不過介面和抽像類不能直接執行個體化。