Prentice.Hall.Introduction.to.Java.Programming,.Brief.Version.9th.(2014).[sharethefiles.com]

}
jbtClearSQLCommand.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
jtasqlCommand.setText(null);
}
});
jbtClearSQLResult.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
jtaSQLResult.setText(null);
}
});
/** Connect to DB */
private void connectToDB() {
// Get database information from the user input
String driver = (String)jcboDriver.getSelectedItem();
String url = (String)jcboURL.getSelectedItem();
String username = jtfUsername.getText().trim();
String password = new String(jpfPassword.getPassword());
}
// Connection to the database
try {
connection = DriverManager.getConnection(
url, username, password);
jlblConnectionStatus.setText("Connected to " + url);
}
catch (java.lang.Exception ex) {
ex.printStackTrace();
}
/** Execute SQL commands */
private void executeSQL() {
if (connection == null) {
jtaSQLResult.setText("Please connect to a database first");
return;
}
else {
String sqlCommands = jtasqlCommand.getText().trim();
String[] commands = sqlCommands.replace('\n', ' ').split(";");
}
}
for (String aCommand: commands) {
if (aCommand.trim().toUpperCase().startsWith("SELECT")) {
processSQLSelect(aCommand);
}
else {
processSQLNonSelect(aCommand);
}
}
/** Execute SQL SELECT commands */
private void processSQLSelect(String sqlCommand) {
try {
// Get a new statement for the current connection
statement = connection.createStatement();
// Execute a SELECT SQL command
ResultSet resultSet = statement.executeQuery(sqlCommand);
5