Question

I have created a Java class for connecting to the MySQL database for my Java SWING Application.

public class DB1 {

private static Connection c;

public static Connection getMyConnection() throws Exception {
    if (c == null) {
        JTextField myUserNameTextField = new JTextField();
        JTextField myPasswordTextField = new JTextField();
        JTextField myIPTextField = new JTextField();
        JTextField myPortTextField = new JTextField();
        String myUserName = myUserNameTextField.getText();
        String myPassword = myPasswordTextField.getText();
        String myURL = "jdbc:mysql:// " + myIPTextField.getText() + ":" + myPortTextField.getText() + "/DBName";

        Class.forName("com.mysql.jdbc.Driver");

        c = DriverManager.getConnection(myURL, myUserName, myPassword);
    }
    return c;

}

public static void InsertEditDelete(String sql) throws Exception {
    getMyConnection().createStatement().executeUpdate(sql);
}

public static ResultSet Search(String sql) throws Exception {
    return getMyConnection().createStatement().executeQuery(sql);
}
}

I want to dynamically change the IP , which is localhost here and the port number from Jtextfields , so u do not recompile every time u change the IP and PORT number. These JTextfields should get opened up in a JFRAME

Answer 1

ResultSet rs = st.executeQuery("SELECT username, password, host, port FROM  myAllData where id=1");

String myURL = "jdbc:mysql:// " + rs.getString("host") + ":" + rs.getString("port") + "/DBName"
String myUserName = rs.getString("username");
String myPassword = rs.getString("password");

Class.forName("com.mysql.jdbc.Driver");

c = DriverManager.getConnection(myURL, myUserName, myPassword);

Update 1

If you need JTextField use below.

String myUserName = myUserNameTextField.getText();
String myPassword = myPasswordTextField.getText();
String myURL = "jdbc:mysql:// " + myIPTextField.getText() + ":" + myPortTextField.getText() + "/DBName"

Class.forName("com.mysql.jdbc.Driver");

c = DriverManager.getConnection(myURL, myUserName, myPassword);

Good Luck!!!