Probe

import java.net.*;

// Single port scanner
public class Probe implements Runnable {

    private Socket socket;
    private int port;
    private int timeout; // timeout in milliseconds for the socket
    private InetAddress host_address;

    // Constructor
    public Probe (InetAddress host_address, int port, int timeout) throws PortException {
        if(port <=0 || port > 65535)
            throw new PortException("Invalid port number");
        if(timeout < 0)
            throw new PortException("Invalid timeout");
        // setting properties
        this.setPort(port);
        this.setAddress(host_address);
        this.setTimeout(timeout);
    }

    // Getters and setters
    public int getPort() { return port; }
    public int getTimeout() { return timeout; }
    public InetAddress getAddress() { return host_address; }
    public void setPort(int v) { port = v; }
    public void setTimeout(int v) { timeout = v; }
    public void setAddress(InetAddress v) { host_address = v; }

    // Run method
    @Override
    public void run () {
        try {
            socket = new Socket();
            socket.connect(new InetSocketAddress(this.getAddress(), this.getPort()), this.getTimeout());
            System.out.println("Port [" + this.getPort() + "] \t\t OPEN");
        } catch (Exception e){
            // do nothing: the port is closed or some error happened
        }
    }

}