Null or empty response from database?

Question

Is there anything I can do with connecting to my database? I get null or empty response. There is no error message.
package databaseconnection; import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; public class MainTest { static String userName = "mynickname"; static String userPassword = "myunforgettablepassword"; static String databaseUrl = "jdbc:mysql://databaseserver.com/myfavouritedatabase"; static String userQuery = "SELECT * FROM ques"; public static void main(String[] args) { // ConnectToDatabase CTD = new ConnectToDatabase();             MainTest MainTest= new MainTest();             MainTest.connect(userName, userPassword, databaseUrl, userQuery); // CTD.connect(userName, userPassword, databaseUrl, userQuery); System.out.println(); // i get null as the response? } void connect(String userName, String userPassword, String databaseUrl, String userQuery){ try { Class.forName ("com.mysql.jdbc.Driver").newInstance (); Connection conn = DriverManager.getConnection (databaseUrl, userName, userPassword); Statement stat = conn.createStatement(); String query = userQuery; ResultSet result = stat.executeQuery(query); try{                         while (result.next()) { String s = result.getString("Name");         System.out.println(s);     return; } }                                 catch ( SQLException sqlException)         {               sqlException.printStackTrace();         } System.out.println("Result(s): "); while(result.next()){ System.out.println("name:\t" + result.getString("Name")); System.out.println(""); } conn.close(); }catch (SQLException e) { } catch (InstantiationException e) {} catch (IllegalAccessException e) {} catch (ClassNotFoundException e) {}         } }
/* * Found here and modified from: * http://www.romow.com/computer-blog/how-to-use-mysql-with-java/ */ package databaseconnection; import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.ResultSetMetaData; import java.sql.SQLException; import java.sql.Statement; import javax.swing.JOptionPane; public class ConnectToDatabase { String s; public void connect(String userName, String userPassword, String databaseUrl, String userQuery){ try { Class.forName ("com.mysql.jdbc.Driver").newInstance (); Connection conn = DriverManager.getConnection (databaseUrl, userName, userPassword); Statement stat = conn.createStatement(); String query = userQuery;                     ResultSet result = stat.executeQuery(query); try{                                                 while (result.next()) {       s = result.getString("Name");         System.out.println(s);     return; } }                                 catch ( SQLException sqlException)         {               sqlException.printStackTrace();         }                         System.out.println("Result(s): "); while(result.next()){ System.out.println("name:\t" + result.getString("Name")); System.out.println(""); }                             conn.close(); }catch (SQLException e) { } catch (InstantiationException e) {} catch (IllegalAccessException e) {} catch (ClassNotFoundException e) {}         }     }        

Answer 1

Note: This thread was originally posted in the Swing forum, but moved to this forum for closer topic alignment.