Singleton

[fenshen6046]

哪位大虾知道java中的Singleton啊，能不能举个例子啊。

[QQ6562934]

你是想知道模式，还是方法啊？

[QQ6562934]

public class DaoFactory {

private static DaoFactory daoFactory ;

private DaoFactory() {

}


public static DaoFactory newInstance() {

if (daoFactory == null){
daoFactory = new DaoFactory();
}
return daoFactory;
}
}

单一模式的一种表现

[fenshen6046]

我想知道方法，我现在只知道用这个的话，说明只能创建一个对象，可是怎么用我不知道

[elaine_ying]

饿汉式:
public class Singleton{
private static Singleton singleton = new Singleton ();
private Singleton (){}
public Singleton getInstance(){return singletion;}
}

懒汉式:
public class Singleton{
private static Singleton singleton = null;
public static synchronized synchronized getInstance(){
if(singleton==null){
singleton = new Singleton();
}
return singleton;
}
}

[ftgreat]

mark~