package telnetclient;import java.awt.*;import java.awt.event.*;import javax.swing.*;import ipworks.*;public class telnetClientFrame extends JFrame {  private JPanel contentPane;  private TextField textField1 = new TextField();  private Button button1 = new Button();  private Label label1 = new Label();  private TextArea textArea1 = new TextArea();  private Telnet telnet1 = new Telnet();  private Button button2 = new Button();  //Construct the frame  public telnetClientFrame() {    enableEvents(AWTEvent.WINDOW_EVENT_MASK);    try {      jbInit();    }    catch(Exception e) {      e.printStackTrace();    }  }  //Component initialization  private void jbInit() throws Exception  {    //setIconImage(Toolkit.getDefaultToolkit().createImage(telnetClientFrame.class.getResource("[Your Icon]")));    contentPane = (JPanel) this.getContentPane();    textField1.setBounds(new Rectangle(108, 4, 206, 21));    contentPane.setLayout(null);    this.setSize(new Dimension(504, 429));    this.setTitle("Telnet客戶端");    button1.setLabel("連接");    button1.setBounds(new Rectangle(323, 3, 72, 23));    button1.addActionListener(new java.awt.event.ActionListener() {      public void actionPerformed(ActionEvent e) {        button1_actionPerformed(e);      }    });    label1.setText("輸入站點名：");    label1.setBounds(new Rectangle(20, 4, 80, 21));    textArea1.setBounds(new Rectangle(6, 35, 478, 338));    textArea1.addKeyListener(new java.awt.event.KeyAdapter() {      public void keyTyped(KeyEvent e) {        textArea1_keyTyped(e);      }    });    button2.setEnabled(false);    button2.setLabel("斷開");    button2.setBounds(new Rectangle(408, 3, 74, 23));    button2.addActionListener(new java.awt.event.ActionListener() {      public void actionPerformed(ActionEvent e) {        button2_actionPerformed(e);      }    });    telnet1.addTelnetEventListener(new ipworks.TelnetEventListener() {      public void command(TelnetCommandEvent e) {      }      public void connected(TelnetConnectedEvent e) {      }      public void dataIn(TelnetDataInEvent e) {        telnet1_dataIn(e);      }      public void disconnected(TelnetDisconnectedEvent e) {      }      public void doDo(TelnetDoDoEvent e) {        telnet1_doDo(e);      }      public void dont(TelnetDontEvent e) {        telnet1_dont(e);      }      public void error(TelnetErrorEvent e) {      }      public void readyToSend(TelnetReadyToSendEvent e) {      }      public void subOption(TelnetSubOptionEvent e) {      }      public void will(TelnetWillEvent e) {        telnet1_will(e);      }      public void wont(TelnetWontEvent e) {        telnet1_wont(e);      }    });    contentPane.add(textArea1, null);    contentPane.add(textField1, null);    contentPane.add(button1, null);    contentPane.add(label1, null);    contentPane.add(button2, 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 button1_actionPerformed(ActionEvent e) {    try    {      telnet1.setTimeout(100);              //設置連接到Telnet主機的缺省最大時間      telnet1.setRemoteHost(textField1.getText()); //設置Telnet主機的名稱      telnet1.setConnected(true);          //連接到Telnet主機      button2.setEnabled(true);      button1.setEnabled(false);    }    catch (Exception e1)    {      System.out.println("Error: " + e1);   //捕捉異常情況    }  }  void button2_actionPerformed(ActionEvent e) {    try    {      telnet1.setConnected(false);        //與Telnet主機斷開連接      textArea1.setText("");      button1.setEnabled(true);      button2.setEnabled(false);    }    catch(Exception e1)    {      System.out.println("Error: " + e1);  //捕捉異常情況    }  }  void telnet1_dataIn(TelnetDataInEvent e) {   //當接收到Telnet主機發送的數據時產生的動作    textArea1.append(new String(e.text));  }  void telnet1_doDo(TelnetDoDoEvent e) {       //當接收到Telnet主機發送的Telnet DO OPTION命令時產生的動作    try {      telnet1.setDoOption(e.optionCode);     //向Telnet主機發送一個單字節的Telnet option code以響應Telnet主機發送的命令    }    catch (Exception e1) {      System.out.println("Error: " + e1);      //捕捉異常情況    }  }  void telnet1_will(TelnetWillEvent e) {     //當接收到Telnet主機發送的Telnet WILL OPTION命令時產生的動作    try {      telnet1.setWillOption(e.optionCode);    //向Telnet主機發送一個單字節的Telnet option code以響應Telnet主機發送的命令    }    catch (Exception e1) {      System.out.println("Error: " + e1);    //捕捉異常情況    }  }  void telnet1_dont(TelnetDontEvent e) {       //當接收到Telnet主機發送的Telnet DONT OPTION命令時產生的動作    try {      telnet1.setDontOption(e.optionCode);     //向Telnet主機發送一個單字節的Telnet option code以響應Telnet主機發送的命令    }    catch (Exception e1) {      System.out.println("Error: " + e1);      //捕捉異常情況    }  }  void telnet1_wont(TelnetWontEvent e) {      //當接收到Telnet主機發送的Telnet WONT OPTION命令時產生的動作    try {      telnet1.setWontOption(e.optionCode);     //向Telnet主機發送一個單字節的Telnet option code以響應Telnet主機發送的命令    }    catch (Exception e1) {      System.out.println("Error: " + e1);      //捕捉異常情況    }  }  void textArea1_keyTyped(KeyEvent e) {     //當用戶在Telnet文字顯示區域敲入字符時產生的動作    try {      byte[] toSend = new byte[1];      toSend[0] = (byte)e.getKeyChar();      //將用戶輸入的字符轉換為字節形式      telnet1.setDataToSend(toSend);         //向Telnet主機發送用戶數據      e.consume();                           //不產生缺省的按鍵動作    }    catch (Exception e1) {      System.out.println("Error: " + e1);    //捕捉異常情況    }  }}