Исходный файл OrelAndReshka.java:

public class OrelAndReshka extends Thread {
    int i = 0; 
    public String s;

    public OrelAndReshka(String x) {
        s = x;
    }

    public void run() { 
        while( i < 10)
      	    try {  
                Thread.sleep((int)(java.lang.Math.random()*1000.));
                System.out.println(s);
                i++;
            } 
            catch (InterruptedException e) {
            System.out.println(e.toString());                    
        }
             

    }   

    public static void main(String args[]) {   
        new OrelAndReshka("OREL").start();
        new OrelAndReshka("RESHKA").start();
    }
}