How do I check what table types exist in a database?

public static void main(String[] args) throws Exception
{
      // Load the database driver - in this case, we
      // use the Jdbc/Odbc bridge driver.
      Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");

      // Open a connection to the database
      Connection conn = DriverManager.getConnection("[jdbcURL]", 
                        "[login]", "[passwd]");

      // Get DatabaseMetaData
      DatabaseMetaData dbmd = conn.getMetaData();

      // Get all table types.
      ResultSet rs = dbmd.getTableTypes();

      // Printout table data
      while(rs.next())
      {
          // Printout
          System.out.println("Type: " + rs.getString(1));
      }

      // Close database resources
      rs.close();
      conn.close();
}