Beispiel #1
0
 public void actionPerformed(ActionEvent e) {
   // Invoked when an action occurs.
   if (e.getSource().equals(singleSizeUp)) {
     singleSize = singleSize * 2;
     singleSizeLabel.setText("Image height=" + singleSize);
   }
   if (e.getSource().equals(singleSizeDown)) {
     singleSize = Math.max(64, singleSize / 2);
     singleSizeLabel.setText("Image height=" + singleSize);
   }
   if (e.getSource().equals(seqSizeUp)) {
     seqSize = seqSize * 2;
     seqSizeLabel.setText("Image height=" + seqSize);
   }
   if (e.getSource().equals(seqSizeDown)) {
     seqSize = Math.max(64, seqSize / 2);
     seqSizeLabel.setText("Image height=" + seqSize);
   }
 }
  // event handling
  public void actionPerformed(ActionEvent e) {
    if (e.getSource() == btnok) {
      PreparedStatement pstm;
      ResultSet rs;
      String sql;
      // if no entries has been made and hit ok button throw an error
      // you can do this step using try clause as well
      if ((tf1.getText().equals("") && (tf2.getText().equals("")))) {
        lblmsg.setText("Enter your details ");
        lblmsg.setForeground(Color.magenta);
      } else {

        try {
          Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
          Connection connect = DriverManager.getConnection("jdbc:odbc:student_base");
          System.out.println("Connected to the database");
          pstm = connect.prepareStatement("insert into student_base values(?,?)");
          pstm.setString(1, tf1.getText());
          pstm.setString(2, tf2.getText());
          // execute method to execute the query
          pstm.executeUpdate();
          lblmsg.setText("Details have been added to database");

          // closing the prepared statement  and connection object
          pstm.close();
          connect.close();
        } catch (SQLException sqe) {
          System.out.println("SQl error");
        } catch (ClassNotFoundException cnf) {
          System.out.println("Class not found error");
        }
      }
    }
    // upon clickin button addnew , your textfield will be empty to enternext record
    if (e.getSource() == btnaddnew) {
      tf1.setText("");
      tf2.setText("");
    }

    if (e.getSource() == btnexit) {
      System.exit(1);
    }
  }
Beispiel #3
0
  public void actionPerformed(ActionEvent e) {
    Object source = e.getSource();
    // Client pressed enter in the message entry field-send it
    if (source == enterField) {
      // Get the message
      message = e.getActionCommand();
      try {
        // Encipher the message
        if (message.length() > plaintextBlockSize)
          message = message.substring(0, plaintextBlockSize);
        byte[] ciphertext =
            Ciphers.RSAEncipherWSalt(message.getBytes(), BigIntegerMath.THREE, recipModulus, sr);
        // Send to the server
        output.write(ciphertext);
        output.flush();
        // Display same message in client output area
        displayArea.append("\n" + message);
        enterField.setText("");
      } catch (IOException ioe) {
        displayArea.append("\nError writing message");
      }
    } else if (source == connectButton) {
      if (connection != null) { // Already connected-button press now means disconnect
        try {
          // Send final message of 0
          byte[] lastMsg = new byte[1];
          lastMsg[0] = 0;
          output.write(Ciphers.RSAEncipherWSalt(lastMsg, BigIntegerMath.THREE, recipModulus, sr));
          output.flush();
          // close connection and IO streams, change some components
          closeAll();
        } catch (IOException ioe) {
          displayArea.append("\nError closing connection");
        }
      } else { // Not connected-connect
        // Get name of server to connect to
        chatServer = serverField.getText();
        displayArea.setText("Attempting connection to " + chatServer);
        try {
          // Set up the socket
          connection = new Socket(chatServer, 55555);

          displayArea.append("\nConnected to: " + connection.getInetAddress().getHostName());

          // Set up the IO streams
          output = new DataOutputStream(connection.getOutputStream());
          output.flush();
          input = new DataInputStream(connection.getInputStream());

          // Exchange public keys with the server-send yours, get theirs
          exchangeKeys();

          // Change appearance/functionality of some components
          serverField.setEditable(false);
          connectButton.setLabel("Disconnect from server above");
          enterField.setEnabled(true);
          // Set up a thread to listen for the connection
          listener =
              new Thread(
                  new Runnable() {
                    public void run() {
                      go();
                    }
                  });
          listener.start();
        } catch (IOException ioe) {
          displayArea.append("\nError connecting to " + chatServer);
        }
      }
    }
  }