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);
}
}
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);
}
}
}
}
