Java 设计模式 之 单例模式 Singleton

http://www.verejava.com/?id=16998944430453

package com.singleton.theory;

public class TestSingleton
{

    public static void main(String[] args)
    {
        Singleton s1=Singleton.getInstance();
        Singleton s2=Singleton.getInstance();
        System.out.println(s1);
        System.out.println(s2);
    }

}





package com.singleton.theory;

public class Singleton
{
    private static Singleton instance;
    
    private Singleton()
    {
        
    }
    
    public static Singleton getInstance()
    {
        if(instance==null)
        {
            instance=new Singleton();
        }
        return instance;
    }
}

http://www.verejava.com/?id=16998944430453