mainframe.java

局域网内实现的五子棋和简单的聊天工具。

package udpserver;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
import java.net.*;
/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2005</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */

public class MainFrame extends JFrame {
  byte[] buf=new byte[1000];  //字节数组成员属性，用于发送和接收数据
  DatagramPacket dp=new DatagramPacket(buf,buf.length);  //数据报包
  DatagramSocket socket;  //数据报套接字

  JPanel contentPane;
  JLabel jLabel1 = new JLabel();
  JTextField jTextField1 = new JTextField();
  JButton jButton1 = new JButton();
  JScrollPane jScrollPane1 = new JScrollPane();
  JTextArea jTextArea1 = new JTextArea();

  //Construct the frame
  public MainFrame() {
    enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  //Component initialization
  private void jbInit() throws Exception  {
    contentPane = (JPanel) this.getContentPane();
    jLabel1.setFont(new java.awt.Font("Dialog", 0, 14));
    jLabel1.setRequestFocusEnabled(true);
    jLabel1.setText("监听端口");
    jLabel1.setBounds(new Rectangle(24, 19, 59, 26));
    contentPane.setLayout(null);
    this.setSize(new Dimension(335, 300));
    this.setTitle("UDP-服务器端");
    jTextField1.setFont(new java.awt.Font("Dialog", 0, 14));
    jTextField1.setText("6544");
    jTextField1.setBounds(new Rectangle(89, 19, 101, 26));
    jButton1.setBounds(new Rectangle(216, 19, 93, 26));
    jButton1.setFont(new java.awt.Font("Dialog", 0, 14));
    jButton1.setText("启动系统");
    jButton1.addActionListener(new MainFrame_jButton1_actionAdapter(this));
    jScrollPane1.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
    jScrollPane1.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
    jScrollPane1.setBounds(new Rectangle(24, 61, 282, 202));
    jTextArea1.setText("");
    contentPane.add(jLabel1, null);
    contentPane.add(jTextField1, null);
    contentPane.add(jButton1, null);
    contentPane.add(jScrollPane1, null);
    jScrollPane1.getViewport().add(jTextArea1, null);
  }
  //Overridden so we can exit when window is closed
  protected void processWindowEvent(WindowEvent e) {
    super.processWindowEvent(e);
    if (e.getID() == WindowEvent.WINDOW_CLOSING) {
      System.exit(0);
    }
  }

  class ReadMessageThread extends Thread{
                public void run(){
                        while(true){
                                try{
                                        socket.receive(dp);  //读入数据报包
                            } catch (IOException e1) {   //捕捉可能产生的异常
                                      jTextArea1.append("读端口信息出错\n");
                              }
                                //分离数据报包的信息，将数据信息构成String类型
                                String rcvd=new String(dp.getData(),0,dp.getLength());
                                InetAddress ip=dp.getAddress();
                                int port=dp.getPort();
                                rcvd=rcvd+",from address:"+ip+",prot:"+port;
                                jTextArea1.append("从客户端读入如下的信息:"+rcvd+"\n");
                                String echo="服务器已接收到来自"+ip+"的信息";
                                //将反馈信息字符串转换为字节数组
                                buf=echo.getBytes();
                                //构建发送信息数据报包
                                dp=new DatagramPacket(buf,buf.length,ip,port);
                                try{
                                        socket.send(dp);  //发送数据报包
                            } catch (IOException e2) {   //捕捉可能产生的异常
                                      jTextArea1.append("发送信息出错\n");
                              }
                        }
                }
        }

  void jButton1_actionPerformed(ActionEvent e) {
    try{
            //建立数据报套接字
            socket=new DatagramSocket(Integer.parseInt(jTextField1.getText()));
          jTextArea1.append("系统提示:服务器端数据报建立\n");
       } catch (IOException e1) {   //捕捉可能产生的异常
                 jTextArea1.append("服务器端口打开出错\n");
       }
       if (socket != null) {
            //启动读信息线程
            ReadMessageThread readThread=new ReadMessageThread();
            readThread.start();
    }

  }

}

class MainFrame_jButton1_actionAdapter implements java.awt.event.ActionListener {
  MainFrame adaptee;

  MainFrame_jButton1_actionAdapter(MainFrame adaptee) {
    this.adaptee = adaptee;
  }
  public void actionPerformed(ActionEvent e) {
    adaptee.jButton1_actionPerformed(e);
  }
}