单例模式之懒汉模式

package mode;

 

/**

 * 设计模式之懒汉模式

 * @author gaoq

 * @date 2015-12-5 下午5:04:15

 */

public class SingletoLazyMode {

 

private static volatile SingletoLazyMode singletoLazyMode = null;

 

/**防止外部创建对象**/

private SingletoLazyMode() {

 

}

 

public static SingletoLazyMode getInstance(){

if(null == singletoLazyMode){

singletoLazyMode = new SingletoLazyMode();

}

return singletoLazyMode;

}

 

public void test(){

System.out.println("hello，懒汉");

}

 

}