Help with RMI using inheritance program

Question

Hi all, im having trouble starting (and finding info on how to) to convert this program to use RMI. I have just completed re-structuring the program to use extended inheritance along with a Access Database.
Whats the first step i need to take.
Any help will be much appreciated. THANKS ALL
import java.sql.*;
import javax.swing.*;
import java.util.*;
public class Database {
   public java.sql.Connection connection;
   public void connect() 
      String url = "jdbc:odbc:groupTask2";  
      String username = "admin";   String password = "teama";
      // Load the driver to allow connection to the database
      try {
         Class.forName( "sun.jdbc.odbc.JdbcOdbcDriver" );
         connection = java.sql.DriverManager.getConnection(url, username, password );
      catch ( ClassNotFoundException cnfex ) {
         System.err.println("Failed to load JDBC/ODBC driver->"  + cnfex);
      catch ( SQLException sqlex ) {
         System.err.println( "Unable to connect->" + sqlex );
   public void showTeams()
      java.sql.Statement statement;
      java.sql.ResultSet resultSet;
      try {
         String query = "SELECT Team_name FROM Team_class";
         statement = connection.createStatement();
         resultSet = statement.executeQuery( query );
         displayResultSet( resultSet );
         statement.close();
      catch ( SQLException sqlex ) {
         sqlex.printStackTrace();
   public void showPlayers()
      java.sql.Statement statement;
      java.sql.ResultSet resultSet;
      String team = null;
      try {
         String s = JOptionPane.showInputDialog("Please select Team: \n\n1. Panthers \n2. Quails \n3. Bears \n4. Nevils \n ");
         int a = Integer.parseInt(s);
         switch (a){
             case 1: team = "Panthers";
                     break;
             case 2: team = "Quails";
                     break;
             case 3: team = "Bears";
                     break;
             case 4: team = "Nevils";
                     break;
         String query = "SELECT player_id, First_name, Last_name FROM Player_class WHERE Team_name LIKE '"+team+"'";
         statement = connection.createStatement();
         resultSet = statement.executeQuery( query );
         displayResultSet( resultSet );
         statement.close();
      catch ( SQLException sqlex ) {
         sqlex.printStackTrace();
   public void update()
      java.sql.Statement statement;
      java.sql.Statement statement2;
      java.sql.ResultSet resultSet;
      String field = null;
      try {
         String a = JOptionPane.showInputDialog("Please Enter the player ID:");
         int id = Integer.parseInt(a);
         String b = JOptionPane.showInputDialog("Which field would you like to update? \n\n1. First name \n2. Last name \n3. Address \n ");
         int choice = Integer.parseInt(b);
         switch (choice){
             case 1: field = "First_name";
                     break;
             case 2: field = "Last_name";
                     break;
             case 3: field = "address";
                     break;
         String val = JOptionPane.showInputDialog("Please enter new " +field);
         String query = "UPDATE Player_class SET "+field+" = '"+val+"' WHERE player_id = "+id;
         statement = connection.createStatement();
         statement.executeQuery( query );
         statement.close(); 
      catch ( SQLException sqlex ) {
         sqlex.printStackTrace();
   public void displayResultSet( ResultSet rs )
      throws SQLException
      // position to first record
      boolean moreRecords = rs.next();  
      // If there are no records, display a message
      if ( ! moreRecords ) {
            System.out.println( "ResultSet contained no records" );
            return;
      System.out.println( "" );
      try {
         java.sql.ResultSetMetaData rsmd = rs.getMetaData(); 
         // Get column heads
         for ( int i = 1; i <= rsmd.getColumnCount(); ++i ) {
             System.out.print(rsmd.getColumnName( i ) + "\t");
         System.out.println();
         do {// get row data
              displayNextRow( rs, rsmd );
         } while ( rs.next() );
      catch ( SQLException sqlex ) {
         sqlex.printStackTrace();
   public void displayNextRow( ResultSet rs, 
                              ResultSetMetaData rsmd )
       throws SQLException
      for ( int i = 1; i <= rsmd.getColumnCount(); ++i )
         switch( rsmd.getColumnType( i ) ) {
            case java.sql.Types.VARCHAR:
                  System.out.print (rs.getString( i )+"\t\t" );
               break;
            case java.sql.Types.INTEGER:
                  System.out.print ( rs.getLong( i ) + "\t\t") ;
               break;
            default: 
               System.out.println( "Type was: " + 
                  rsmd.getColumnTypeName( i ) );
         System.out.println();
   public void shutDown()
      try {
         connection.close();
      catch ( SQLException sqlex ) {
         System.err.println( "Unable to disconnect->" + sqlex );
   public static void main( String args[] ) 
       int sel = 0;
       Menu M = new Menu();
       Database app = new Database();
       sel = M.mainmenu(sel);
       while (sel > 0 && sel < 5){
       switch (sel){
           case 1: app.connect();
                   app.showTeams();
                   app.shutDown();
                   sel = M.mainmenu(sel);
                   break;
           case 2: app.connect();
                   app.showPlayers();
                   app.shutDown();
                   sel = M.mainmenu(sel);
                   break;
           case 3: app.connect();
                   app.update();
                   app.shutDown();
                   sel = M.mainmenu(sel);
                   break;
class Menu{ 
    int choice = 0;
    int temp = 0; 
    public Menu(){
    public int mainmenu(int val){ 
        String a = JOptionPane.showInputDialog("TEAM MENU \n\nPlease select an option by entering " + 
                "the corresponding number: \n\n1. Display Teams \n2. Show Players \n3. Update a Player \n4. Search \n "); 
        val= Integer.parseInt(a); 
        return val; 
    public int setChoice(int val){
        choice = val;
        return choice;
} 

Answer 1

Well, I'd say a starting point is to split the functionality into "client" and "server". This will wind up as two programs, the client making - remote - requests of the server.
A fairly natural way would be to assign viewing/display to the client, direct access to the database to the server. So then you have to figure out
o what kinds of requests can go acrross the divide.
o what kind of data will be returned.
This may not be that easy, because things that the server can do easily (like I/O) cnnot be carried back and forth in RMI calls.)