java重設定時器頻率

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 1 public class BallUtil { 2     public static  Timer fisTimer ; 3      4     public static void fisStartBall(){ 5         long firstTime = 2000l; 6         long time = 2000l; 7         if(fisTimer==null){ 8             fisTimer = new Timer(); 9         }10         fisTimer.scheduleAtFixedRate(new TimerTask(){11             public void run(){12                 System.out.println("time="+time+"-----firstTime="+"定時器執行"+"----type="+type);13                 Date date = new Date();14                 int hour = date.getHours();15                 if(hour==9){16                         System.out.println("重設頻率");17                         stop();//關閉後再開啟18                         start();19                         //直接更新新的時間20                         //Long newTime = patt.getInt("INTERVDAY")*60l*1000;21                         //resetPeriod(newTime);22                 }23             }24             //此方法也可以重設頻率，直接傳入新的時間25             public void resetPeriod(final long time) throws IllegalArgumentException, IllegalAccessException{26                 Field[] fields = this.getClass().getSuperclass() .getDeclaredFields();  27                    for (Field field : fields)  28                    {  29                        if (field.getName().endsWith("period"))  30                        {  31                            if (!field.isAccessible())  32                            {  33                                field.setAccessible(true);  34                            }  35                            field.set(this, time);  36                        }  37                    }  38             }39         }, firstTime, time);40     }41     public  static void start(){42             fisStartBall();43     }44     45     public static void stop(){46             fisTimer.cancel();47     }48 }

 

java重設定時器頻率