timer purge

計時器類purge()方法 (Timer Class purge() method)

• purge() method is available in java.util package.

  purge()方法在java.util包中可用。

• purge() method is used to remove all canceled tasks from the task queue of this Timer.

  purge()方法用于從此Timer的任務隊列中刪除所有已取消的任務。

• purge() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.

  purge()方法是一種非靜態方法，只能通過類對象訪問，如果嘗試使用類名稱訪問該方法，則會收到錯誤消息。

• purge() method does not throw an exception at the time of canceling task.

  purge()方法在取消任務時不會引發異常。

Syntax:

句法：

public int purge();

Parameter(s):

參數：

• It does not accept any parameter.

  它不接受任何參數。

Return value:

返回值：

The return type of the method is int, it returns the removed cancelled task from the queue.

方法的返回類型為int ，它從隊列中返回已刪除的已取消任務。

Example:

例：

// Java program to demonstrate the example // of int purge() method of Timerimport java.util.*;class CancelTimer extends TimerTask {// Task defined in this methodpublic void run() {System.out.println("In Stock...Stop Working");} }public class PurgeOfTimer {public static void main(String[] args) {// Instantaites a TimerTask and// Timer objectTimerTask task = new CancelTimer();Timer tmr = new Timer();// By using scheduleAtFixedRate() method isto// schedule the task at a constant rate in a// repeated mannertmr.scheduleAtFixedRate(task, new Date(), 330);// By using cancel() method is to// cancel this timer and stop// the scheduled taskSystem.out.println("tmr.cancel(): " + "Cancelled");tmr.cancel();// By using purge() method is to// remove cancelled from the task// listSystem.out.println("tmr.purge(): " + tmr.purge());} }

Output

輸出量

tmr.cancel(): Cancelled In Stock...Stop Working tmr.purge(): 0

翻譯自: https://www.includehelp.com/java/timer-purge-method-with-example.aspx

timer purge

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