Multithreaded relay in Java

import org.zeromq.ZMQ;
import org.zeromq.ZMQ.Context;
import org.zeromq.ZMQ.Socket;

/**
* Multithreaded relay
*/

public class mtrelay{

private static class Step1 extends Thread
{
private Context context;

private Step1 (Context context)
{
this.context = context;
}

@Override
public void run(){
// Signal downstream to step 2
Socket xmitter = context.socket(ZMQ.PAIR);
xmitter.connect("inproc://step2");
System.out.println ("Step 1 ready, signaling step 2");
xmitter.send("READY", 0);
xmitter.close ();
}

}
private static class Step2 extends Thread
{
private Context context;

private Step2 (Context context)
{
this.context = context;
}

@Override
public void run(){
// Bind to inproc: endpoint, then start upstream thread
Socket receiver = context.socket(ZMQ.PAIR);
receiver.bind("inproc://step2");
Thread step1 = new Step1 (context);
step1.start();

// Wait for signal
receiver.recv(0);
receiver.close ();

// Connect to step3 and tell it we're ready
Socket xmitter = context.socket(ZMQ.PAIR);
xmitter.connect("inproc://step3");
xmitter.send("READY", 0);

xmitter.close ();
}

}
public static void main (String[] args) {

Context context = ZMQ.context(1);

// Bind to inproc: endpoint, then start upstream thread
Socket receiver = context.socket(ZMQ.PAIR);
receiver.bind("inproc://step3");

// Step 2 relays the signal to step 3
Thread step2 = new Step2 (context);
step2.start();

// Wait for signal
receiver.recv(0);
receiver.close ();

System.out.println ("Test successful!");
context.term ();
}
}