Image not displaying in JAR file, but display on Eclipse run

Question

I see other StackOverflow users have been having this error. However, when I try what the first person did (make it use getClass().getClassLoader().getResource(myPath), which is URL), it doesn't work in the Eclipse IDE run nor in the JAR file. I can't make sense of one of the answers on here, but I do understand this one:

The getImage call is looking in the file system working directory, not inside the Jar file. This is why the jar file loads the images successfully when they are placed in the same directory outside the jar file. If the images are bundled in the jar file, they are no longer file system files to be accessed, but rather Jar file resources. There is a different way to load these, but sorry, I don't know it off the top of my head

Before this, I thought the image file (whose relative path is /images/folder.jpg wasn't being included in the JAR file. I extracted it and could not find the image.) In attempt to address that, I included images folder in build path (Project > Properties > Java build path > Source). After doing so, I extract JAR file again, and notice the picture is there, but not in images folder.

This is what I tried from the Java code side:

//this.selectDirector = new JButton(new ImageIcon(getClass().getClassLoader().getResource("images/folder.jpg")));
this.selectDirectory = new JButton(new ImageIcon("images/folder.jpg"));

Is there answer to this (or way to do what the quote says should be done)? UPDATE:

I moved images folder to inside bin folder, and removed it from the build path (so that only src folder was on the build path). For good measure, I also placed it in the src folder. I updated my two lines of code to:

this.selectDirector = new JButton(new ImageIcon(getClass().getClassLoader().getResource("images/folder.jpg")));
//this.selectDirectory = new JButton(new ImageIcon("src/images/folder.jpg"));

Now, it works from Eclipse, but still doesn't work from JAR file (it's throwing NullPointerException).

Have you tried using `getClass().getResource("/images/folder.jpg");`? — MadProgrammer, Nov 09 '15 at 01:01
I use either on Eclipse IDE side, and get `NullPointerException` — Mike Warren, Nov 09 '15 at 01:04
And the image is stored where (relative to the Eclipse project directory)? — MadProgrammer, Nov 09 '15 at 01:05
If I am not mistaken, project directory is `workspace/DirectoryCleanerCopy`, and `folder.jpg` is in `images` folder inside project directory — Mike Warren, Nov 09 '15 at 01:07
1. Make sure that the images directory is been included in the resulting `jar`; 2. Move `images` into the `src` directory — MadProgrammer, Nov 09 '15 at 01:09

score 0 · Accepted Answer · answered Nov 09 '15 at 22:49

I could not figure out how to guarantee Eclipse shipping the images folder with folder.jpg in it, with the rest of the code, even if I put it in src and bin folders. Despite that, I was still able to fix the problem

What I ended up doing

I remembered what JAR file was: a Java-generated compressed file (similar to a RAR file or a ZIP file). Knowing that, I opened up generated JAR file with WinRAR, went to project directory, and dragged images folder to WinRAR instance. WinRAR put the images folder in the JAR file! I then change my Java code (that uses folder.jpg) to: this.selectDirectory = new JButton(new ImageIcon(getClass().getClassLoader().getResource("images/folder.jpg")));

The downside

The downside is that I will have to keep images folder floating around, so that I run WinRAR and copy images over, on every new export from Eclipse. There must exist better way, but I will accept this one, for now...

Image not displaying in JAR file, but display on Eclipse run

1 Answers1