import java.util.concurrent.TimeUnit;

public class ThreadExample implements Runnable {

  private String greeting; // Message to print to console

  public ThreadExample(String greeting) {
    this.greeting = greeting;
  }

  public void run() {
    while (true) {
      System.out.println(Thread.currentThread().getName() + ":  " + greeting);
      try {
        // Sleep 0 to 100 milliseconds
        TimeUnit.MILLISECONDS.sleep(((long) Math.random() * 100));
      } catch (InterruptedException e) {
      } // Should not happen
    }
  }

  public static void main(String[] args) {
    new Thread(new ThreadExample("Hello")).start();
    new Thread(new ThreadExample("Aloha")).start();
    new Thread(new ThreadExample("Ciao")).start();
  }
}