//单例模式,始终只产生一个对象
/*public class SingleTest
{
public static void main(String[] args)
{
SingleTon singleTon1=SingleTon.getInstance();
SingleTon singleTon2=SingleTon.getInstance();
System.out.println(singleTon1==singleTon2);
}
}
class SingleTon
{
private static SingleTon singleton=new SingleTon();
private SingleTon()
{
}
public static SingleTon getInstance()
{
return singleton;
}
}**/