Java - Thread carrera liebre y tortuga

public class LiebreThread implements Runnable{
public LiebreThread(){

}

@Override
public void run() {
// TODO Auto-generated method stub
int i=0;
System.out.println("arranco la liebre");
while(i<5){
try{
Thread.sleep(2000);
System.out.println("soy la liebre");
}catch(InterruptedException ex){
}
i++;
}
System.out.println("termina la liebre");
}
}

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public class TortugaThread implements Runnable {

@Override

public void run() {

// TODO Auto-generated method stub

int i=0;

System.out.println("arranco la tortuga");

while(i<5){

try{

Thread.sleep(5000);

System.out.println("soy la tortuga");

}catch(InterruptedException ex){

}

i++;

}

System.out.println("termina la tortuga");

}

}

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public class Main {

public static void main (String args[]){

Thread tortuga1 = new Thread(new TortugaThread()); //creación del proceso tortuga1

Thread liebre1 = new Thread(new LiebreThread()); //creación del proceso liebre1

tortuga1.start();

//si quisiera asignarle más prioridad tortuga1.setPriority(Thread.MAX_PRIORITY);

liebre1.start();

//si quisiera asignarle menos prioridad liebre1.setPriority(Thread.MIN_PRIORITY);

}

}