Exported my Java game from eclipse, and it gets an error when running

Question

I made a Java game in eclipse and when I run the executable .jar it starts up, and the loading screen starts, but then it stops and hangs. I ran it using the command line: "Java -jar filename.jar" and when the loading screen stops it displays an error. This is what the cmd shows:

D:\>java -jar Speedrunner.jar  
60Ticks, FPS:1637  
javax.imageio.IIOException: Can't read input file!  
    at javax.imageio.ImageIO.read(Unknown Source)  
    at com.daves.first_Scroller.utils.BufferedImageLoader.loadImage(Buffered  
ImageLoader.java:26)  
    at com.daves.first_Scroller.utils.ResourceLoader.loadImages(ResourceLoad  
er.java:17)  
    at com.daves.first_Scroller.Game.load(Game.java:100)  
    at com.daves.first_Scroller.Game.tick(Game.java:160)  
    at com.daves.first_Scroller.Game.run(Game.java:228)  
    at java.lang.Thread.run(Unknown Source)  
60Ticks, FPS:1744
java.io.IOException: Can't read .\resources\Fonts\tight_pixel.ttf
    at java.awt.Font.createFont(Unknown Source)    
    at com.daves.first_Scroller.utils.Fonts.registerFont(Fonts.java:36)  
    at com.daves.first_Scroller.utils.Fonts.<init>(Fonts.java:28)  
    at com.daves.first_Scroller.utils.ResourceLoader.loadFonts(ResourceLoader.java:30)  
    at com.daves.first_Scroller.Game.load(Game.java:105)  
    at com.daves.first_Scroller.Game.tick(Game.java:160)  
    at com.daves.first_Scroller.Game.run(Game.java:228)  
    at java.lang.Thread.run(Unknown Source)  
60Ticks, FPS:1761  
Mon Mar 17 12:18:08 GMT 2014 INFO:Initialising sounds..  
Exception in thread "Thread-2" java.lang.UnsatisfiedLinkError: no lwjgl in java.  
library.path  
    at java.lang.ClassLoader.loadLibrary(Unknown Source)  
    at java.lang.Runtime.loadLibrary0(Unknown Source)  
    at java.lang.System.loadLibrary(Unknown Source)  
    at org.lwjgl.Sys$1.run(Sys.java:73)  
    at java.security.AccessController.doPrivileged(Native Method)  
    at org.lwjgl.Sys.doLoadLibrary(Sys.java:66)  
    at org.lwjgl.Sys.loadLibrary(Sys.java:95)  
    at org.lwjgl.Sys.<clinit>(Sys.java:112)  
    at org.lwjgl.openal.AL.<clinit>(AL.java:59)  
    at org.newdawn.slick.openal.SoundStore$1.run(SoundStore.java:295)  
    at java.security.AccessController.doPrivileged(Native Method)  
    at org.newdawn.slick.openal.SoundStore.init(SoundStore.java:292)  
    at org.newdawn.slick.Sound.<init>(Sound.java:83)  
    at com.daves.first_Scroller.utils.AudioPlayer.addSound(AudioPlayer.java:29)  
    at com.daves.first_Scroller.utils.ResourceLoader.loadSounds(ResourceLoader.java:35)  
    at com.daves.first_Scroller.Game.load(Game.java:110)  
    at com.daves.first_Scroller.Game.tick(Game.java:160)  
    at com.daves.first_Scroller.Game.run(Game.java:228)  
    at java.lang.Thread.run(Unknown Source)  

EDIT - I looked in the .jar file and it contains all the Fonts and sprites it needs, and eclipse packaged all libraries needed into the .jar when I exported it.

Answer 1

Seems like this file:

.\resources\Fonts\tight_pixel.ttf

is not included on your jar. Probably it was available on your classpath when you executed your project from Eclipse, so you didn't notice it.

Answer 2

You need to tell java where to look for the LWJGL library. Add the following to the command line:

-Djava.library.path=path/to/dir

From the documentation:

I keep getting an java.lang.UnsatisfiedLinkError: no lwjgl in java.library.path

This is because the native part is not setup correctly. Add a -Djava.library.path=path/to/dir to the commandline or as an VM option in your IDE so that lwjgl is able to find the folder containing the native files.

External link: http://www.lwjgl.org/wiki/index.php?title=Downloading_and_Setting_Up_LWJGL

Answer 3

It seems that .\\resources\\Fonts\\tight_pixel.ttf is not found. That may be because before you were running you game from another path. (Or you didn't include it in your package)

Answer 4

The file .\\resources\\Fonts\\tight_pixel.ttf is missing in your .jar file.

That's, what the line java.io.IOException: Can't read .\\resources\\Fonts\\tight_pixel.ttf tells you.

To solve it, integrate the folder resources into the path. Then it's integrated into your exported .jar file.