Java Swing Application issue in IntelliJ vs Eclipse

Question

I created a project in Java back in 2017 that included a GUI. At the time I used Eclipse. I am now using IntelliJ and am trying to recreate the project there. It still runs fine in Eclipse but when I run it in IntelliJ I get:

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
    at java.desktop/javax.swing.ImageIcon.<init>(ImageIcon.java:217)
    at Application.load(Application.java:619)
    at Application.initActions(Application.java:549)
    at Application.<init>(Application.java:47)
    at Main$1.run(Main.java:14)
    at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
    at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:770)
    at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
    at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:715)
    at java.base/java.security.AccessController.doPrivileged(Native Method)
    at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
    at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:740)
    at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
    at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
    at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
    at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
    at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
    at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)

It would appear that the exact lines it has a problem with are:

   private ImageIcon load(final String name) {
        return new ImageIcon(getClass().getResource("/icons/" + name + ".png"));
    }

I have not changed the name of the folder icons nor the files in it. What am I missing?

Answer 1

Abra's question actually helped me find the answer. I was missing a folder and its files in src/main.