1/单例模式

package com.mingrisoft;

public class HuangDi {

    private static HuangDi huangdi=null; 
    
    //定义皇帝值初始化
    private HuangDi()
    {
        
    }
    public static HuangDi getHuangdi() 
    
    {                                        //写入皇帝
        if (huangdi==null)
        {
            huangdi=new HuangDi();
        }
        return huangdi;

    }
    public void getName()
    {
        System.out.println("我是皇帝:明日科技");
    }    
}

package com.mingrisoft;

public class Test1 {

    public static void main(String[] args) {
        
        System.out.println("创建皇帝1对象:");
        
        HuangDi huangdi1=HuangDi.getHuangdi();
        
        huangdi1.getName();

    }

}

创建皇帝1对象:
我是皇帝:明日科技