Question

I made a java application and bundled all classes in a jar file. When I run the project from eclipse, my application is running successfully. But when I try to run my .jar file, I am not getting the icons used by my application. In the code I get my icons from images directory present in project folder. How can I present these image files to the end user when using a jar?

I am loading the image like so:

 final public ImageIcon iReport=new ImageIcon("images/Report.png");

I have also tried

final public ImageIcon iquit=new ImageIcon(getClass().getResource("images/quit.png"));

and

final public ImageIcon iquit=new ImageIcon(getClass().getResource("/images/quit.png"));

But this results in an error:

Exception in thread "main" java.lang.NullPointerException
at javax.swing.ImageIcon.<init>(Unknown Source)

Answer 1

You need to get it from the classpath instead of from the local disk file system.

Assuming that images is actually a package and that this package is inside the same JAR as the current class, then do so:

final public ImageIcon iReport = 
    new ImageIcon(getClass().getResource("/images/Report.png"));