Java Snake Xenzia Game . Jar . 128x160 . -

Technical Paper: Java Snake Xenzia Game for 128x160 Screen

Document Version: 1.0
Target Platform: Java ME (J2ME) / CLDC 1.1, MIDP 2.0
Screen Resolution: 128 x 160 pixels
Distribution Format: .jar (Java ARchive)
Game Type: Arcade / Classic Snake (Xenzia)

13. Testing & Emulation

Emulators:

• Sun Java Wireless Toolkit 2.5.2 (default skin 128x160)
• Microemulator (open source)
• KEmulator

Test Matrix:

| Test Case | Expected Result | |-----------|----------------| | Start game | Snake length 3, food visible | | Move into wall | Game Over | | Move into self | Game Over | | Eat food | Length +1, score +10, speed increases | | Press FIRE after game over | Game restarts | | High score update | RMS stores new high score | Java Snake Xenzia Game . Jar . 128x160 .

Gameplay Mechanics: More Than Just "Snake"

While the original Snake from the 1970s was monochrome and grid-locked, the Java Snake Xenzia version brought specific improvements that defined the genre for feature phones.

How to Install (Then vs. Now)

Then (2006):

1. Download the .JAR via WAP (Wireless Application Protocol) costing $0.99.
2. Receive a "Download complete" SMS.
3. Open "My Items" -> "Games" -> Click "Snake Xenzia."

Now (Emulation):

1. Download the .jar file from abandonware archives.
2. Install KEmulator or J2ME Loader on your Android/PC.
3. Force the emulator resolution to "Custom: 128x160" (Letterboxed or Stretched).
4. Map keyboard keys (2,4,6,8 or WASD) to emulate the D-pad.

Pro tip: For the most authentic experience, play on a real Nokia with an LCD screen. Modern OLEDs make the pixels look too sharp; the nostalgic "smear" of a 2006 LCD is half the magic.

On an emulator

• Java ME SDK device manager: select 128x160 skin (e.g., Nokia 6300).
• Microemulator (open source): set resolution manually to 128x160.

Why This Specific Resolution Matters

You might wonder: Why specifically 128x160? Why not 176x220 or 240x320?

The answer is speed and precision.

On a 240x320 screen, the snake spans more pixels, giving you a "longer" lookahead. On 128x160, the snake fills the screen faster. You are always 2 seconds away from death. The high difficulty of the vertical axis (160 pixels) means you have exactly 20 grid rows to navigate. If your snake is 15 segments long, you have almost no room to maneuver.

This claustrophobic intensity is what fans crave. The Java Snake Xenzia 128x160 is the "hard mode" of mobile snake games.

15. Source Code Snippets (Complete MIDlet)

public class SnakeMIDlet extends MIDlet {
    private Display display;
    private GameCanvas gameCanvas;
public void startApp() 
    if(gameCanvas == null) 
        gameCanvas = new GameCanvas();
        display = Display.getDisplay(this);
display.setCurrent(gameCanvas);
    gameCanvas.startGameLoop();
public void pauseApp() {}
public void destroyApp(boolean unconditional) 
    gameCanvas.stopGameLoop();

}

4.1 Tile Size Calculation

• Grid resolution: 16 x 20 tiles
• Tile size: 8 x 8 pixels
• Total: 16 * 8 = 128 width, 20 * 8 = 160 height

5.3 Collision Detection

• Self-collision: Check newX,newY against body (index 1..length-1)
• Wall collision: If newX < 0 || newX >= GRID_W || newY < 0 || newY >= GRID_H → Game Over
• Food collision: If newX == food.x && newY == food.y → Eat, grow, spawn new food, increase score