套接字编程

我有两个用两个不同的Java文件编写的程序1.客户端代码2.服务器代码

import javax.swing.*;
import java.awt.*;
import java.net.*;
import java.awt.event.*;

class Destination extends JFrame
{
    JLabel l1;
    JTextArea ta;
    Container cnt;
    DatagramSocket ds;

    Destination() throws Exception
    {
        l1 = new JLabel("Received Message  :");
        ta = new JTextArea(10, 25);
        cnt = getContentPane();
        cnt.setLayout(new FlowLayout());
        cnt.add(l1);
        cnt.add(ta);
        setSize(400, 200);
        setDefaultCloseOperation(2);
        setVisible(true);
        ds = new DatagramSocket(210);
    }

    void dispMsg() throws Exception
    {
        while (true)
        {
            byte b[] = new byte[50];
            ds.receive(new DatagramPacket(b, 0, b.length));
            String msg = new String(b, 0, b.length);
            msg = msg.trim();
            ta.append(msg + "\n");
            if (msg.equals("bye"))
            {
                break;
            }
        }
    }

    public static void main(String ar[]) throws Exception
    {
        (new Destination()).dispMsg();
    }
}

2.服务器端

import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JTextField;

class Source extends JFrame implements ActionListener
{
    JLabel l1;
    JTextField t1;
    JButton btn;
    Container cnt;
    DatagramSocket ds;

    Source() throws Exception
    {
        l1 = new JLabel("Enter Message");
        t1 = new JTextField(20);
        btn = new JButton("Send Message");
        btn.addActionListener(this);
        cnt = getContentPane();
        cnt.setLayout(new FlowLayout());
        cnt.add(l1);
        cnt.add(t1);
        cnt.add(btn);
        setSize(400, 200);
        setDefaultCloseOperation(2);
        setVisible(true);
        ds = new DatagramSocket(210);
    }

    public void actionPerformed(ActionEvent e)
    {
        try
        {
            ds.send(new DatagramPacket(t1.getText().getBytes(), 0, t1.getText().length(),
                    InetAddress.getLocalHost(), 211));
        }
        catch (Exception e1)
        {
            JOptionPane.showMessageDialog(this, e1, "Error", 0);
        }
    }

    public static void main(String ar[]) throws Exception
    {
        new Source();
    }
}

我想通过cmd运行这两个程序，我应该先运行哪个程序，当我运行第一个代码时，cmd被禁用，不允许我运行第二个代码，建议我如何运行两个程序