Java

class Thread1 implements Runnable
{
   public void run()
   {
      System.out.println("Thread 1 running");
   }
}

class Thread2 implements Runnable
{
   public void run()
   {
      System.out.println("Thread 2 running");
   }
}

class Program
{
   public static void main(string[] args)
   {
      try
      {
         Thread thread1 = new Thread(new Thread1());
         thread1.start();
         
         Thread thread2 = new Thread(new Thread2());
         thread2.start();
      }
      catch(Exception e)
      {
         System.error.println(e);
      }
   }
}