just1 - a Histori Midlet - User Guide


The just1 Midlet is a J2ME game providing Hitori puzzles for Java enabled cell phones or other mobile devices (see the J2ME Device List. The game requires at least MIDP 1.0 and CLDC 1.0).

A Hirori puzzle is a grid of squares which are filled with numbers. At the beginning all numbers are not marked. The goal of the game is to paint out some numbers to fulfill the following three basic rules:

For more information, explanations and basic rules check out Hitori details.


Current Version: 1.1
jad/jar files (all devices, jar size 63K, english language set) are located here:

To download the game to your mobile via WAP open your phone's wap browser and go to: http://wintermute.de/wap/just1/
The Midlet is Emailware developed by Ive&Marcus (Freeware with a request): If you use it, please pass a short note to .
The License applied to the Midlet (binary) and the sourcecode can be viewed here
The midlet's sources are located at start of entry :: just1 WikiWeb. (sources)

just1 game screen

This is the puzzle screen. Use the navigation keys of your mobile device to move the cursor around. You can toogle black/white/unmarked using the '5' key or use '1', '3' or '0' to directly set the cells status.

Status Display

You can check the current elapsed time for the active puzzle by using the * key (If you have a pointer device, you can select the Status command). A small info box will be displayed. Time accounting will stop as soon as the puzzle has been solved. It will be reset by the Reset Game command.

Hint Helper

You can display hints, if you get stuck by pressing # key (If you have a pointer device, you can select the Hint command). A small box will show a hint an the referring cells are marked accordingly.

More Commands


The just1 Midlet sources and binaries are licensed under the GNU General Public License

just1 Midlet - a Hitori game on J2ME with generator and solver

Copyright (c) 2007 Ivonne Engemann, Marcus Wagner (midlet (at) wintermute.de)

This library is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA