单例设计模式

最新推荐文章于 2020-01-03 09:56:39 发布

转载最新推荐文章于 2020-01-03 09:56:39 发布 · 551 阅读

文章转载专栏收录该内容

1 篇文章

订阅专栏

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