Java Timer - schedule() Method

The java.util.Timer.schedule() method is used to schedule the specified task for execution after the specified delay.

Syntax

public void schedule(TimerTask task,
                     long delay)

Parameters

Return Value

void type.

Exception

• Throws IllegalArgumentException, if delay is negative, or delay + System.currentTimeMillis() is negative.
• Throws IllegalStateException, if task was already scheduled or cancelled, timer was cancelled, or timer thread terminated.
• Throws NullPointerException, if task is null.

Example:

In the example below, the java.util.Timer.schedule() method is used to schedule the given task for execution at the specified delay.

import java.util.*;

public class MyClass {
  public static void main(String[] args) {
    //creating a timer
    Timer timer = new Timer();

    //creating a timertask
    TimerTask tt = new TimerTask() {
      public void run() {
        for (int i = 0; i <= 5; i++) {
          System.out.println("Working on the task.");
        }
        System.out.println("Task is finished.");
      };
    };
    
    //scheduling the task to be executed
    //after a delay of 1000 milliseconds
    timer.schedule(tt, 1000);
  }
}

The output of the above code will be:

Working on the task.
Working on the task.
Working on the task.
Working on the task.
Working on the task.
Working on the task.
Task is finished.