class Single
{
private Single(){};
private static Single s=new Single;
public static Single getInstance()
{
return s;
}
}
class
{
public static void main(String[] args)
{
Single ss=Single.getInstance();
}
}
对于事物如何描述的还是如何描述。
当需要保证对象唯一时就加上以上3步。
懒汉式
class Single
{
private Single(){};
private static Single s=null;
public static Single getInstance()
{
if(s==null)