java聊天室源代码 第3页
import java.net.*;
import java.io.*;

/**
 * 用户链表的结点类
 */
public class Node {
 String username = null;
 Socket socket = null;
 ObjectOutputStream output = null;
 ObjectInputStream input = null;
  
 Node next = null;
}import java.awt.*;
import javax.swing.border.*;
import java.net.*;
import javax.swing.*;
import java.awt.event.*;

/**
 * 生成端口设置对话框的类
 */
public class PortConf extends JDialog {
 JPanel panelPort = new JPanel();
 JButton save = new JButton();
 JButton cancel = new JButton();
 public static JLabel DLGINFO=new JLabel(
  "                              默认端口号为:8888");

 JPanel panelSave = new JPanel();
 JLabel message = new JLabel();

 public static JTextField portNumber ;

 public PortConf(JFrame frame) {
  super(frame, true);
  try {
   jbInit();
  }
  catch (Exception e) {
   e.printStackTrace();
  }
  //设置运行位置，使对话框居中
  Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
  this.setLocation( (int) (screenSize.width - 400) / 2 + 50,
      (int) (screenSize.height - 600) / 2 + 150);
  this.setResizable(false);
 }

 private void jbInit() throws Exception {
  this.setSize(new Dimension(300, 120));
  this.setTitle("端口设置");
  message.setText("请输入侦听的端口号:");
  portNumber = new JTextField(10);
  portNumber.setText(""+ChatServer.port);
  save.setText("保存");
  cancel.setText("取消");

  panelPort.setLayout(new FlowLayout());
  panelPort.add(message);
  panelPort.add(portNumber);

  panelSave.add(new Label("              "));
  panelSave.add(save);
  panelSave.add(cancel);
  panelSave.add(new Label("              "));

  Container contentPane = getContentPane();
  contentPane.setLayout(new BorderLayout());
  contentPane.add(panelPort, BorderLayout.NORTH);
  contentPane.add(DLGINFO, BorderLayout.CENTER);
  contentPane.add(panelSave, BorderLayout.SOUTH);

  //保存按钮的事件处理
  save.addActionListener(
   new ActionListener() {
    public void actionPerformed (ActionEvent a) {
     int savePort;
     try{
751com.cn
       return;
      }
      ChatServer.port = savePort;
      dispose();
     }
     catch(NumberFormatException e){
      PortConf.DLGINFO.setText("                错误的端口号,端口号请填写整数!");
      PortConf.portNumber.setText("");
      return;
     }
    }
   }
  );

  //关闭对话框时的操作
  this.addWindowListener(
   new WindowAdapter(){
    public void windowClosing(WindowEvent e){
     DLGINFO.setText("                              默认端口号为:8888");
    }
   }
  );

  //取消按钮的事件处理
  cancel.addActionListener(
   new ActionListener(){
    public void actionPerformed(ActionEvent e){
     DLGINFO.setText("                              默认端口号为:8888");
     dispose();
    }
   }
  );
 }
}

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