I got
Exception in thread "main" java.lang.IllegalArgumentException: input == null!
at java.desktop/javax.imageio.ImageIO.read(ImageIO.java:1400)
at studentsystem.frame.StudentSystemLoginFrame.<init>(StudentSystemLoginFrame.java:121)
at studentsystem.run.TestLogin.main(TestLogin.java:7)
when I'm using Image img = ImageIO.read(this.getClass().getResource("/2.png"));
The error appeared in StudentSystemLoginFrame. My project directory looks like this:
