ScheduledThreadPoolExecutor example

package mypackage;
import java.text.DateFormat;

import java.util.Date;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

public class ScheduledExample {
    final static DateFormat fmt = DateFormat.getTimeInstance(DateFormat.LONG);
    public static void main(String[] args) {
        // Create a scheduled thread pool with 5 core threads
        ScheduledThreadPoolExecutor sch = (ScheduledThreadPoolExecutor)
                Executors.newScheduledThreadPool(5);
        
        // Create a task for one-shot execution using schedule()
        Runnable oneShotTask = new Runnable(){
            @Override
            public void run() {
                System.out.println("\t oneShotTask Execution Time: "
                            + fmt.format(new Date()));
            }
        };
        
        // Create another task
        Runnable delayTask = new Runnable(){
            @Override
            public void run() {
                try{
                    System.out.println("\t delayTask Execution Time: "
                            + fmt.format(new Date()));
                    Thread.sleep(10 * 1000);
                    System.out.println("\t delayTask End Time: "
                            + fmt.format(new Date()));
                }catch(Exception e){
                    
                }
            }
        };
        
        // And yet another
        Runnable periodicTask = new Runnable(){
            @Override
            public void run() {
                try{
                    System.out.println("\t periodicTask Execution Time: "
                            + fmt.format(new Date()));
                    Thread.sleep(10 * 1000);
                    System.out.println("\t periodicTask End Time: "
                            + fmt.format(new Date()));
                }catch(Exception e){
                    
                }
            }
        };
        
        System.out.println("Submission Time: " + fmt.format(new Date()));
    //  ScheduledFuture<?> oneShotFuture = sch.schedule(oneShotTask, 5, TimeUnit.SECONDS);
      ScheduledFuture<?> delayFuture = sch.scheduleWithFixedDelay(delayTask, 5, 5, TimeUnit.SECONDS);
     //   ScheduledFuture<?> periodicFuture = sch.scheduleAtFixedRate(periodicTask, 5, 5, TimeUnit.SECONDS);
    }
}