/**

* In real world USB port is a point of interaction - Interface.

* This code simulates the real world scenario using interface.

*

* @author L.Gobinath

*/

public class Computer {

public static void main(String[] args) {

Computer comp = new Computer();

}

public void connect(USB usb) {

usb.send(new byte[] {1}); // Send some data

byte[] data = usb.receive(); // Receive some data

// do something here

}

}

interface USB {

void send(byte[] data);

byte[] receive();

}

class Mouse implements USB {

@Override

public void send(byte[] data) {

System.out.println("Connected");

}

@Override

public byte[] receive() {

return new byte[] {120, 87};

}

}