运行时，用户登录端：
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.net.*;
import java.io.*;
public class New extends JFrame {//登录窗口类
JPanel contentPane;
//*****************
String server;//服务器名
int serport;//端口
private Socket socket;
private BufferedReader in;//输入输出流
private PrintWriter out;
//***********//程序界面
JPanel jPanel1 = new JPanel();
JLabel jLabel1 = new JLabel();
JLabel jLabel2 = new JLabel();
JTextField jicq = new JTextField();
JLabel jLabel3 = new JLabel();
JPasswordField password = new JPasswordField();
JPanel jPanel2 = new JPanel();
JButton login = new JButton();
JButton newuser = new JButton();
JButton quit = new JButton();
JLabel jLabel6 = new JLabel();
JTextField servername = new JTextField();
JLabel jLabel7 = new JLabel();
JTextField serverport = new JTextField();
public New() {
enableEvents(AWTEvent.WINDOW_EVENT_MASK);
try { jbInit();
server=servername.getText().toString().trim();
serport=Integer.parseInt(serverport.getText().trim());
} catch(Exception e) { e.printStackTrace(); }
}
private void jbInit() throws Exception {
contentPane = (JPanel) this.getContentPane();
contentPane.setLayout(null);
this.setResizable(false);
this.setSize(new Dimension(344, 245));
this.setTitle("New JICQ");
//contentPane.add(text, null);
