单例模式的应用

package com.hanqi;

public class Emperor {
 private static Emperor emperor=null;
 
 private Emperor(){
     
 }
 
 public static Emperor getlnstance(){
     if(emperor==null){
         emperor=new Emperor();
     }
      return emperor;
     
 }
 public void getName(){
     System.out.println("我是皇帝：张卫");
 }
}

package com.hanqi;

public class Test {

    public static void main(String[] args) {
        System.out.println("创建皇帝1对象：");
        
        Emperor emperor1 = Emperor.getlnstance();
        
        emperor1.getName();
        
        System.out.println("创建皇帝2对象：");
        
        Emperor emperor2 = Emperor.getlnstance();
        
        emperor2.getName();
        
        System.out.println("创建皇帝3对象：");
        
        Emperor emperor3 = Emperor.getlnstance();
        
        emperor3.getName();

    }

}