Java Concurrency - Executor Interface


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A java.util.concurrent.Executor interface is a simple interface to support launching new tasks.

ExecutorService Methods

Sr.No. Method & Description
1

void execute(Runnable command)

Executes the given command at some time in the future.

Example

The following TestThread program shows usage of Executor interface in thread based environment.

Live Demo
import java.util.concurrent.Executor;
import java.util.concurrent.Executors;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

public class TestThread {

   public static void main(final String[] arguments) throws InterruptedException {
      Executor executor = Executors.newCachedThreadPool();
      executor.execute(new Task());
      ThreadPoolExecutor pool = (ThreadPoolExecutor)executor;
      pool.shutdown();
   }  

   static class Task implements Runnable {
      
      public void run() {
         
         try {
            Long duration = (long) (Math.random() * 5);
            System.out.println("Running Task!");
            TimeUnit.SECONDS.sleep(duration);
            System.out.println("Task Completed");
         } catch (InterruptedException e) {
            e.printStackTrace();
         }
      }
   }
}

This will produce the following result.

Output

Running Task!
Task Completed


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