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作者 一个很简单的问题,求解
ice0819





发贴: 17
积分: 1
于 2009-10-14 22:21 user profilesend a private message to usersearch all posts byselect and copy to clipboard. 
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class Base{
  static int y=2;

  Base(int x){
    this();// 似乎没有被调用
    y*=2;
    System.out.println("constructer in base\t"+y);  
  }

  Base(){
   y++;
   System.out.println("default constructer in base\t"+y);
  }
}

class Sub extends Base{

  Sub(){
    super(y);
    y+=3;
  }

  public static void main(String args[]){

    new Sub();
    System.out.println(y);
    
  }

}
为什么this()没被调用



作者 Re:一个很简单的问题,求解 [Re:ice0819]
ggggwffgqeg





发贴: 3
积分: 0
于 2009-10-23 02:02 user profilesend a private message to usersearch all posts byselect and copy to clipboard. 
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怎么没被调用,结果是
default constructer in base 3
constructer in base 6
9
楼主自己再运行一下试试。



作者 Re:一个很简单的问题,求解 [Re:ice0819]
JiafanZhou



版主


发贴: 736
积分: 61
于 2009-10-23 18:35 user profilesend a private message to usersend email to JiafanZhousearch all posts byselect and copy to clipboard. 
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this() invokes the default constructor with no args. Although it is not a common practice to do that, it is still valid.


When I was a kid I used to pray every night for a new bike. Then I realized that The Lord doesn't work that way, so I stole one and asked him to forgive me.

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