“make clean all run”有效，但 Eclipse 上的项目不会运行

Question

I'm trying to make a project, that was never used on Eclipse before, work. Keep in mind that the code is not mine so I don't know everything about it. The project run perfectly fine with Cygwin using "make" with the "make clean all run" command but when I'm launching it on Eclipse, I have this error message:

Exception in thread "main" java.lang.NullPointerException: Cannot invoke "java.awt.Image.getProperty(String, java.awt.image.ImageObserver)" because "image" is null>

That error is caused by (the last line in the first code section):

private void initClass() {

    BufferedImage prefs_image;

    prefs_image     = MBMImagesDico.loadBestImage(ICON_PREFS_STR,
                                              Transparency.TRANSLUCENT);
    _prefs_icon     = new ImageIcon(prefs_image);
}

and (the last line in this code section):

public ImageIcon (Image image) {
    this.image = image;
    Object o = image.getProperty("comment", imageObserver);
}

because image is null.

It seems that Eclipse is not finding the image file that the program is looking for. So I tried:

• Changing the BuildPath to include the ressource folder (here it's called Images) or the Icons folder included in the Images folder. Neither or that worked
• Changing the working directory from default to the bin of the project Here is a picture of what "changing the working directory" means
• Cheching that the bin do include the images files, the ressource folder and that the asked path is coresponding to what is built in the bin
• Looking intensively at the code to understand why I am getting a null (while knowing everything works fine when using "make so that was hopeless)

And I still didn't find a solution.

I'm using Eclipe 2021-09 (4.21.0) and java 8u202.

I'm including a picture of the path in debug mode and the actual path in the bin. As you can see, it "should" work. The path demanded during the execution The path in the bin folder in the project folder

It's my first post on StackOverflow so I'm sorry in advance if I didn't include enough informations or I talked too much. I'm a bit desperate (it's probably easy to fix). Wish you all a good day.

Answer 1

Turns out the problem was that I was using the wrong version of the JRE and had nothing to do with the build path or the source directory.

So this how I fixed it:

• I cancelled everything that I tried first, for example I set back the working directory to default.
• I went to "run configuration" in the "JRE" tab and selected "Alternate JRE". I added the propper JRE with the "Installed JRE" and "Add" button (in my case I had to add an 1.8 jdk file).
• Don't forget to select the jre you just added in the dropdown menu (yes I forgot at first).
• Then I hit "Apply" and "Run" and everything worked, finally.

Here is a picture of the "JRE" tab in "Run configuration"