Banco de dados SQL SERVER 2005

package Programa;

import java.sql.*;

public class BancoDeDados {
	public static void main(String args[]) throws SQLException, InstantiationException, IllegalAccessException, ClassNotFoundException{
		Connection con = null;
		try{
			Class.forName("sun.jdbc.odbc.JdbcOdbcDriver").newInstance();
			con = DriverManager.getConnection("jdbc:odbc:RH2","sa","joao");
			Statement stm = con.createStatement();
			String SQL = "Select * from func";
			ResultSet rs = stm.executeQuery(SQL);
			while(rs.next()){
				String n = rs.getString("nome");
				System.out.println(n);
			}
		}catch (SQLException e) {
			e.printStackTrace();
		}
		finally
		{
			try
			{
				con.close();
			}
			catch (Exception onConClose) {
				System.out.println("houve um erro no fechamento da conexao");
				onConClose.printStackTrace();
			}
		}
	}
			
}

ouve um erro no fechamento da conexao

java.sql.SQLException: [Microsoft][ODBC Driver Manager] Nome da fonte de dados não encontrado e nenhum driver padrão especificado

at sun.jdbc.odbc.JdbcOdbc.createSQLException(Unknown Source)

at sun.jdbc.odbc.JdbcOdbc.standardError(Unknown Source)

at sun.jdbc.odbc.JdbcOdbc.SQLDriverConnect(Unknown Source)

at sun.jdbc.odbc.JdbcOdbcConnection.initialize(Unknown Source)

at sun.jdbc.odbc.JdbcOdbcDriver.connect(Unknown Source)

at java.sql.DriverManager.getConnection(Unknown Source)

at java.sql.DriverManager.getConnection(Unknown Source)

at Programa.BancoDeDados.main(BancoDeDados.java:10)

java.lang.NullPointerException

at Programa.BancoDeDados.main(BancoDeDados.java:25)