Can classes in java that implement runnable have methods other than run()

public static void main(String args[])
{
    try
    {
    	myClass test = new Thread(new myClass(stuff));
    	test.start();
    	test.join();
    }
    catch (Throwable t) { }
}

Thread test = new Thread(new myClass(stuff));
teste.start();
teste.join();

public class MyRunner implements Runnable
{
    @Override public void run();
    public void somethingElse();
}

Runnable r = new MyRunner();
r.somethingElse(); // won't work, this method not defined by Runnable.

MyRunner m = new MyRunner();
m.somethingElse(); // success!

class MyRunnable implements Runnable() {
  public void run() { /* do run stuff */ }
  public void print() { /* do print stuff */ }
}

class MyThread extends Thread() {
  public void run() { /* do run stuff */ }
  public void print() { /* do print stuff */ }
}

Thread t = new Thread(new MyRunnable());
t.start();
t.print(); // error, t is a Thread not a MyRunnable and not a MyThread
t.join();

MyRunnable mr = new MyRunnable();
mr.run(); // doesn't run in its own thread
mr.print(); // this is ok

Runnable r = new MyRunnable();
r.run(); // doesn't run in its own thread
r.print(); // error, r is defined as Runnable which has no print() method

MyThread mt = new MyThread();
mt.start();
mt.print(); // this is ok because mt is a MyThread
mt.join();

myClass test = new Thread(new myClass(stuff));

Thread test = new Thread(new myClass(stuff));

public static void main(String args[])
{
    try
    {
        myClass foo = new myClass(stuff);
        myClass test = new Thread(foo);
        test.start();
        test.join();
        foo.print();
    }
    catch (Throwable t) { }
}