ResultSet rs = statement.executeQuery();
ResultSetMetaData rsmd = rs.getMetaData();
System.out.println("querying SELECT * FROM XXX");
int columnsNumber = rsmd.getColumnCount();
while (rs.next()) {
    for (int i = 1; i <= columnsNumber; i++) {
        if (i > 1) System.out.print(",  ");
        String columnValue = rs.getString(i);
        System.out.print(columnValue + " " + rsmd.getColumnName(i));
    }
    System.out.println("");
}