udptimeserverframe.java

Java实例入门

package udptimeserver;

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

/**
 * Title:        时钟服务程序
 * Description:  这是一个使用用户数据报协议（UDP）实现的简单时钟服务器
 * Copyright:    Copyright (c) 2001
 * Company:
 * @author
 * @version 1.0
 */

public class UdpTimeServerFrame extends JFrame {
  JPanel contentPane;
  JLabel statusBar = new JLabel();
  BorderLayout borderLayout1 = new BorderLayout();
  JPanel jPanelCmd = new JPanel();
  JPanel jPanelLog = new JPanel();
  BorderLayout borderLayout2 = new BorderLayout();
  JScrollPane jScrollPaneLog = new JScrollPane();
  TitledBorder titledBorder1;
  JLabel jLabel1 = new JLabel();
  JTextField txtPort = new JTextField();
  JButton command = new JButton();
  JLabel jLabel3 = new JLabel();
  JLabel jLabel2 = new JLabel();
  JTextArea txtLog = new JTextArea();
  timeServer server;
  /**Construct the frame*/
  public UdpTimeServerFrame() {
    enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  /**Component initialization*/
  private void jbInit() throws Exception  {
    //setIconImage(Toolkit.getDefaultToolkit().createImage(UdpTimeServerFrame.class.getResource("[Your Icon]")));
    contentPane = (JPanel) this.getContentPane();
    titledBorder1 = new TitledBorder(BorderFactory.createEtchedBorder(Color.white,new Color(134, 134, 134)),"日志");
    contentPane.setLayout(borderLayout1);
    this.setSize(new Dimension(354, 241));
    this.setTitle("时钟服务器");
    statusBar.setText(" ");
    jPanelLog.setLayout(borderLayout2);
    jScrollPaneLog.setBorder(titledBorder1);
    jLabel1.setText("请输入时钟服务端口号：");
    txtPort.setText("13");
    txtPort.setColumns(5);
    command.setText("Start");
    command.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        command_actionPerformed(e);
      }
    });
    jLabel3.setToolTipText("");
    jLabel3.setText("  ");
    jLabel2.setText("  ");
    contentPane.add(statusBar, BorderLayout.SOUTH);
    contentPane.add(jPanelCmd, BorderLayout.NORTH);
    contentPane.add(jPanelLog, BorderLayout.CENTER);
    jPanelLog.add(jScrollPaneLog, BorderLayout.CENTER);
    jScrollPaneLog.getViewport().add(txtLog, null);
    jPanelLog.add(jLabel3,  BorderLayout.WEST);
    jPanelLog.add(jLabel2,  BorderLayout.EAST);
    jPanelCmd.add(jLabel1, null);
    jPanelCmd.add(txtPort, null);
    jPanelCmd.add(command, 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);
    }
  }

  void command_actionPerformed(ActionEvent e) {
    if(e.getActionCommand()=="Start" ){
       if(server!=null) {
           server.stopServer() ;
           server=null;
        }
        server=new timeServer(Integer.parseInt(txtPort.getText().trim()),txtLog);
        server.start();
        statusBar.setText("服务启动，端口为"+txtPort.getText().trim());
        command.setText("Stop");
    }else{
        if(server!=null) {
           server.stopServer() ;
           server=null;
        }
        statusBar.setText("服务终止");
        command.setText("Start");
    }
  }
}