[此贴子已经被作者于2006-2-28 12:41:47编辑过]

[此贴子已经被作者于2006-12-7 17:10:50编辑过]

public class Singleton{
private static Singleton s=new Singleton();
private Singleton(){
}
public static Singleton getSingleton(){
return s;
}
}

我找到了，楼上的给错了,不过谢谢了

public class Fra extends JFrame(){
private static Fra f=null;

private Fra(){

this.setsize(400,300);

this.setvisible(true);

}

public static Fra my(){

if(f==null){

f=new Fra();

}

return f

}
}