1  import java.util.concurrent.*;
  2  
  3  public class ExecutorDemo {
  4    public static void main(String[] args) {
  5      // Create a fixed thread pool with maximum three threads
  6      ExecutorService executor = Executors.newFixedThreadPool(3);
  7  
  8      // Submit runnable tasks to the executor
  9      executor.execute(new PrintChar('a', 100));
 10      executor.execute(new PrintChar('b', 100));
 11      executor.execute(new PrintNum(100));
 12  
 13      // Shut down the executor
 14      executor.shutdown();
 15    }
 16  }