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Java Timer cancel() Method
Description
The Java Timer cancel() method is used to terminate this timer and discarding any currently scheduled tasks.
Declaration
Following is the declaration for java.util.Timer.cancel() method.
public void cancel()
Parameters
NA
Return Value
NA
Exception
NA
Cancelling a Timer Scheduled with Fixed Date and Initial Delay Example
The following example shows the usage of Java Timer cancel() method to cancel the timer operations currently scheduled. We've created a timer object using a CustomTimerTask object. CustomTimerTask is custom class extending TimerTask class and implements the run() method which will execute at scheduled time. Then we created a timer object and scheduled a task using scheduleAtFixedRate() to execute at every 100 milliseconds starting from now. Then using cancel() method, the timer operation is terminated.
package com.tutorialspoint; import java.util.Date; import java.util.Timer; import java.util.TimerTask; public class TimerDemo { public static void main(String[] args) { // creating timer task, timer TimerTask tasknew = new CustomTimerTask(); Timer timer = new Timer(); // scheduling the task timer.scheduleAtFixedRate(tasknew, new Date(), 100); // terminating the timer System.out.println("cancelling timer"); timer.cancel(); } } class CustomTimerTask extends TimerTask { @Override public void run() { System.out.println("working on"); } }
Output
Let us compile and run the above program, this will produce the following result.
cancelling timer working on
Cancelling a Timer Scheduled as Daemon thread Example
The following example shows the usage of Java Timer cancel() method to cancel the timer operations currently scheduled. We've created a timer object using a CustomTimerTask object. CustomTimerTask is custom class extending TimerTask class and implements the run() method which will execute at scheduled time. Then we created a timer object as a daemon thread and scheduled a task using scheduleAtFixedRate() to execute at every 100 milliseconds starting from now. Then using cancel() method, the timer operation is terminated.
package com.tutorialspoint; import java.util.Date; import java.util.Timer; import java.util.TimerTask; public class TimerDemo { public static void main(String[] args) { // creating timer task, timer TimerTask tasknew = new CustomTimerTask(); Timer timer = new Timer(true); // scheduling the task timer.scheduleAtFixedRate(tasknew, new Date(), 100); // terminating the timer System.out.println("cancelling timer"); timer.cancel(); } } class CustomTimerTask extends TimerTask { @Override public void run() { System.out.println("working on"); } }
Output
Let us compile and run the above program, this will produce the following result.
cancelling timer working on
Cancelling a Named Timer Scheduled as Daemon Thread Example
The following example shows the usage of Java Timer cancel() method to cancel the timer operations currently scheduled. We've created a timer object using a CustomTimerTask object. CustomTimerTask is custom class extending TimerTask class and implements the run() method which will execute at scheduled time. Then we created a timer object as a daemon thread, with a given name and scheduled a task using scheduleAtFixedRate() to execute at every 100 milliseconds starting from now. Then using cancel() method, the timer operation is terminated.
package com.tutorialspoint; import java.util.Date; import java.util.Timer; import java.util.TimerTask; public class TimerDemo { public static void main(String[] args) { // creating timer task, timer TimerTask tasknew = new CustomTimerTask(); Timer timer = new Timer("test",true); // scheduling the task timer.scheduleAtFixedRate(tasknew, new Date(), 100); // terminating the timer System.out.println("cancelling timer"); timer.cancel(); } } class CustomTimerTask extends TimerTask { @Override public void run() { System.out.println("working on"); } }
Output
Let us compile and run the above program, this will produce the following result.
cancelling timer working on
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