【无标题】‘单例模式的实现方式(饿汉式和懒汉式)

package com.hao.gitxuexi;
/*
* 单例模式的实现
* */
public class Hello {
    //懒汉式
    /*private static Hello hello = null;

    private Hello(){
        System.out.println("懒汉:无参构造");
    }

    public static Hello getHello(){
        if (hello == null){
            hello = new Hello();
        }
        return hello;
    }*/
    //饿汉式
    private static Hello hello = new Hello();

    private Hello(){
        System.out.println("饿汉:无参构造");
    }

    public static Hello getHello(){
        return hello;
    }
}