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;
	}
}

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