代码如下:class Single
{
private int num;
public void setNum(int num)
{
this.num=num;
}
public int getNum()
{
return num;
}
private Single(){}
private static Single s =new Single();
public static Single getInstence()
{
return s;
}
}
public class SingleDemo
{
public static void main(String[] args)
{
Single ss=Single.getInstence();
ss.setNum(40);
System.out.println("ss="+ss);
}
}
是哪里出现了问题? 请说明一下·· |
|