Game runs from PDE but not from any exports

kellboy

Game runs from PDE but not from any exports

in Integration and Hardware • 2 years ago

Okay, I am building this game, and it works just fine inside the PDE. However, whenever I export it as anything- an applet, any kind of application, it fails. I get nothing but a blank, white window. The console prints out this:

Exception in thread "Animation Thread" java.lang.NullPointerException

at Game$Sprite.<init>(Game.java:123)

at Game.setup(Game.java:28)

at processing.core.PApplet.handleDraw(Unknown Source)

at processing.core.PApplet.run(Unknown Source)

at java.lang.Thread.run(Unknown Source)

But only from outside the PDE do I get this message. I know it isn't a security issue, because I signed the JAR, and the error also happens in applications. What could be the problem? I don't think it has anything to do with my programming, because it runs fine from within the PDE. I also noticed that when exporting, I get this error in the PDE console:

Could not copy source file: /tmp/Game1804938955307683740temp/Game.java

What does it mean?

How do I fix this?

Replies(7)

PhiLho

Re: Game runs from PDE but not from any exports

2 years ago

What is at the line 123 of your file? Opening some file?

kellboy

Re: Re: Game runs from PDE but not from any exports

2 years ago

My Game uses tabs, and none of them so far have 123 lines...

Jesse Sco..

Re: Game runs from PDE but not from any exports

2 years ago

Well, maybe try to put a separate version all back in one tab, export and run it, look to see what line it is complaining about, and post that line. It's probably related to loading a file, but we can't troubleshoot that for you until we know for sure...

PhiLho

Re: Game runs from PDE but not from any exports

2 years ago

Look at the reported line in the reported file, like /tmp/Game1804938955307683740temp/Game.java
This file is generated by concatenating the content of all your tabs.

kellboy

Re: Re: Game runs from PDE but not from any exports

2 years ago

The line was this:

String[] filenames = folder.list(jpgFilter);

Which is part of (as you guessed) an image loading method. It basically scans a directory for .jpg files and loads an image and a mask for each frame. Here is the entire method:

public void loadAnimationFromDirectory(String anim_dir, String i_prefix, String m_prefix)
{
java.io.File folder = new java.io.File(dataPath(anim_dir));
java.io.FilenameFilter jpgFilter = new java.io.FilenameFilter()
{
public boolean accept(File dir, String name)
{
return name.toLowerCase().endsWith(".jpg");
}
};
String[] filenames = folder.list(jpgFilter);
//println(filenames.length + " jpg files in specified directory");
int num_images = filenames.length/2;
m_image = new PImage[images];
m_mask = new PImage[images];
for (int i = 0; i < images; i++)
{
//println(anim_dir+"/"+i_prefix+i+".jpg");
//println(anim_dir+"/"+m_prefix+i+".jpg");
m_image[i] = loadImage(anim_dir+"/"+i_prefix+i+".jpg");
m_mask[i] = loadImage(anim_dir+"/"+m_prefix+i+".jpg");
m_image[i].mask(m_mask[i]);
}
}

This is a member method of the Sprite class, and m_image is the sprite's array of images, and m_mask is the sprite's array of masks. Is there anything in this method that would make it not load even in a desktop application?

PhiLho

Re: Game runs from PDE but not from any exports

2 years ago

Mmm, maybe the error is on a nearby line, like the 17 above, where you use filenames. The latter can be null if the directory 'folder' is not found. Lot of people reported this issue with exported applications recently. Check if the data folder is in the jar and has your files.

kellboy

Re: Re: Game runs from PDE but not from any exports

2 years ago

It is. And it does. It works just fine from the PDE so, I'm pretty sure it has something to do with exporting to the JAR.

EDIT: found out that if the images are loaded from the root directory (the data folder) then they load just fine. But as soon as I put them into a subfolder, they don't load. Even if that subfolder and all of its files are in the JAR. What's the problem here?

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