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                            ### Timer
Timer類的作用是使任務在稍后的時刻運行，或者運行一次，或者周期性運行；
Timer負責管理延遲任務和周期任務，Timer存在缺陷，因此考慮使用ScheduledThreadPoolExecutor替代它；

> 在Java5.0或更高的JDK中將很少使用Timer

### Timer類缺陷：
![](../assets/20180809183640001.png)


                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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