單例模式
		
          
		@import url(http://www.aygfsteel.com/CuteSoft_Client/CuteEditor/Load.ashx?type=style&file=SyntaxHighlighter.css);@import url(/css/cuteeditor.css);
飽漢模式：


          

          

          

          package com.jerry.design.singleton;
          


          

          

          public class FullSingle {
          

          	
          

          	private static FullSingle instance = null;
          

          	
          

          	private FullSingle(){
          

          		
          

          	}
          


          

          

          	public synchronized static FullSingle getIntance(){
          

          		
          

          		if(instance==null){
          

          			
          

          			instance = new FullSingle();
          

          		}
          

          		return instance; 
          

          				
          

          	}
          

          }
          


          

          

          餓漢模式：
          


          

          

          

          

          package com.jerry.design.singleton;
          


          

          

          public class HungrySingle {
          

          	
          

          	private static HungrySingle instance = new HungrySingle();
          

          	
          

          	private HungrySingle(){
          

          		
          

          	}
          


          

          

          	public static HungrySingle getIntance(){
          

          		
          

          		return instance; 
          

          				
          

          	}
          

          }
          


          

          

          測試代碼：
          


          

          

          

          package com.jerry.design.singleton;
          


          

          


          

          

          public class Test {
          

          	
          

          	public static void main(String[] args) {
          

          	
          

          		for(int i=0;i<=10;i++){
          

          			
          

          			System.out.println(FullSingle.getIntance());
          

          			
          

          			System.out.println(HungrySingle.getIntance());
          

          		}
          

          		
          

          //		com.jerry.design.singleton.FullSingle@3487a5cc
          

          //		com.jerry.design.singleton.HungrySingle@eb42cbf
          

          //		com.jerry.design.singleton.FullSingle@3487a5cc
          

          //		com.jerry.design.singleton.HungrySingle@eb42cbf
          

          //		com.jerry.design.singleton.FullSingle@3487a5cc
          

          //		com.jerry.design.singleton.HungrySingle@eb42cbf
          

          //		com.jerry.design.singleton.FullSingle@3487a5cc
          

          //		com.jerry.design.singleton.HungrySingle@eb42cbf
          

          //		com.jerry.design.singleton.FullSingle@3487a5cc
          

          //		com.jerry.design.singleton.HungrySingle@eb42cbf
          

          //		com.jerry.design.singleton.FullSingle@3487a5cc
          

          //		com.jerry.design.singleton.HungrySingle@eb42cbf
          

          //		com.jerry.design.singleton.FullSingle@3487a5cc
          

          //		com.jerry.design.singleton.HungrySingle@eb42cbf
          

          //		com.jerry.design.singleton.FullSingle@3487a5cc
          

          //		com.jerry.design.singleton.HungrySingle@eb42cbf
          

          //		com.jerry.design.singleton.FullSingle@3487a5cc
          

          //		com.jerry.design.singleton.HungrySingle@eb42cbf
          

          //		com.jerry.design.singleton.FullSingle@3487a5cc
          

          //		com.jerry.design.singleton.HungrySingle@eb42cbf
          

          //		com.jerry.design.singleton.FullSingle@3487a5cc
          

          //		com.jerry.design.singleton.HungrySingle@eb42cbf
          


          

          

          		
          

          	}
          


          

          

          }
          


          

          


          

          

          總結(jié): 保持單jvm下的唯一實(shí)例。
          

          

           
          

          
		
          
			posted on 2012-02-19 20:55 瘋狂的蝸牛 閱讀(78) 評論(0)  編輯  收藏  
		
          
	
          
	
	


	


          
	    
    




          





          


          

	
          
		
          
				
		
	
		
          
		
		
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	@import url(http://www.aygfsteel.com/CuteSoft_Client/CuteEditor/Load.ashx?type=style&file=SyntaxHighlighter.css);@import url(/css/cuteeditor.css);

					

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