/**
 * Create 3 threads, each an Echo object
 */
public class MainThread
{
 public static void main( String[] args )
 {
   // Create the tasks
   Echo e1 = new Echo( 'A', 20 );
   Echo e2 = new Echo( 'B', 20 );
   Echo e3 = new Echo( 'C', 20 );

   // Create the Thread objects
   Thread t1 = new Thread( e1 );
   Thread t2 = new Thread( e2 );
   Thread t3 = new Thread( e3 );

   // Every thread has a priority, which is inherited from its parent
   //    (typically 1-10)
   System.out.println( "Priority of t3 is " + t3.getPriority() );
   t3.setPriority( Thread.MAX_PRIORITY );
   System.out.println( "Priority of t3 is now " + t3.getPriority() );

   // JVM picks the currently runnable thread with the highest priority
   //    (equal priority threads are executed round-robin)

   // A lower-priority thread can only run when no higher-priority
   //   threads are running or runnable

   // Start the threads
   t1.start();  // start() creates the thread, then
   t2.start();  //    calls the run() method...
   t3.start();
 }
}