Java files own some attributes that we can setup for an application to look like what we want. Last time, I made it clear that by opening the *.jar file and inserting it with a new icon, we can then replace the application icon with the custom one. For this time, I’d like to show you some properties to change the display of some Java application.

Nokia 5230 (Nuron) is a touchscreen phone, makes the application display is sometimes too small for your phone’s screen. Especially for old Java applications or Java games, where previously the touchscreen phones were still rare to be found on the market.

Okay, to start it, after you have downloaded the Java installation file, open it using a decompression tool like WinRAR, WinZip, etc. There’s should be a META-INF folder inside the *.jar file, open it with Notepad to start editing.

Below the last line inside the MANIFEST.MF file (REMEMBER NOT TO LEAVE ANY LINE BLANK), just copy and paste the following lines:

For completely fullscreen stretched game size:
Nokia-MIDlet-Original-Display-Size: 240,320
Nokia-MIDlet-Target-Display-Size: 360,640

For max game size, without the graphics beeing distorted:
Nokia-MIDlet-Original-Display-Size: 240,320
Nokia-MIDlet-Target-Display-Size: 360,480

Optionally, if you dont want the virtual keypad to display on the screen when running the game, just add this line:
Nokia-MIDlet-On-Screen-Keypad: no

Save the file MANIFEST.MF after editing, exit the decompression tool, and Done! Congratulation, your fullscreen touch-enabled application/game is ready for installation.