Data source name not found

[Nicholas Lefebvre]

I am making a database to store information on people who are competing in a competition. I have created my database in access. When i run my code i get this error

Oct 29, 2013 8:37:18 PM DBConnect <init>
SEVERE: null
java.sql.SQLException: [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified
	at sun.jdbc.odbc.JdbcOdbc.createSQLException(JdbcOdbc.java:6956)
	at sun.jdbc.odbc.JdbcOdbc.standardError(JdbcOdbc.java:7113)
	at sun.jdbc.odbc.JdbcOdbc.SQLDriverConnect(JdbcOdbc.java:3072)
	at sun.jdbc.odbc.JdbcOdbcConnection.initialize(JdbcOdbcConnection.java:323)
	at sun.jdbc.odbc.JdbcOdbcDriver.connect(JdbcOdbcDriver.java:174)
	at java.sql.DriverManager.getConnection(DriverManager.java:579)
	at java.sql.DriverManager.getConnection(DriverManager.java:221)
	at DBConnect.<init>(DBConnect.java:38)
	at DBConnect.main(DBConnect.java:89)

Exception in thread "main" java.lang.NullPointerException
	at DBConnect.<init>(DBConnect.java:43)
	at DBConnect.main(DBConnect.java:89)
Java Result: 1
BUILD SUCCESSFUL (total time: 0 seconds)

This is my code.

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 java.util.logging.Level;
import java.util.logging.Logger;

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

/**
 *
 * @author Thinus.bothma
 */
public class DBConnect {
    private Connection connection;
    private Statement masterStatement;
    private ResultSet masterResultSet;
    private String[] masterColumnData;
    
    public DBConnect() {
        try { 
            try {
                Class.forName("sun.jdbc.odbc.JdbcOdbcDriver").newInstance();
            } catch (    InstantiationException | IllegalAccessException ex) {
                Logger.getLogger(DBConnect.class.getName()).log(Level.SEVERE, null, ex);
            }
        } catch (ClassNotFoundException ex) {
            Logger.getLogger(DBConnect.class.getName()).log(Level.SEVERE, null, ex);
        }
        String database = "jdbc:odbc:Driver={Microsoft Access Driver (.mdb)};DBQ=Database41.mdb"; 
        try {
            connection = DriverManager.getConnection( database ,"","");
        } catch (SQLException ex) {
            Logger.getLogger(DBConnect.class.getName()).log(Level.SEVERE, null, ex);
        }
        try {
            masterStatement = connection.createStatement(); 
        } catch (SQLException ex) {
            Logger.getLogger(DBConnect.class.getName()).log(Level.SEVERE, null, ex);
        }
        try {
            boolean foundResults = masterStatement.execute("SELECT * FROM Table12");
            if(foundResults==true){ 
            masterResultSet = masterStatement.getResultSet(); 
        }else { 
            connection.close(); 
        } 
        } catch (SQLException ex) {
            Logger.getLogger(DBConnect.class.getName()).log(Level.SEVERE, null, ex);
        }
        try {
            ResultSetMetaData metaData = masterResultSet.getMetaData();
            int columns=metaData.getColumnCount();
            masterColumnData= new String[columns];
            
            for(int i=0;i<columns;++i){
                masterColumnData[i]=metaData.getColumnName(i+1);

            }//end of for
            String text="";
            int countRows=0;
            while(masterResultSet.next()){ 
                countRows++;
            for(int i=0;i<columns;++i) {
                String txt=masterResultSet.getString(i+1);
                text+=txt+" ";
            } //end of for
            text+="\n";
            text=text+"\n";
        } //end of while
        } catch (SQLException ex) {
            Logger.getLogger(DBConnect.class.getName()).log(Level.SEVERE, null, ex);
        }
        try {
            connection.close();
        } catch (SQLException ex) {
            Logger.getLogger(DBConnect.class.getName()).log(Level.SEVERE, null, ex);
        }
    }//DBConnect()
    
    public static void main(String[] args){

            new DBConnect();

    }//main()
}//DBConnect