Hello, I am an IT student and we are tasked to do a student system registration GUI in Java and I used NetBeans. First I make a login window, after logging in, the homepage will appear. The buttons in it are add student, operation, and show students. I have already finished the code but when I run it for the last time, there is a bug. the Add student window doesnt appear after I clicked the button for it on the homepage. The other windows are running fine if I clicked their buttons. (I have already set the setObjectVible) Also, I have noticed tha it takes time for the program to run. There was no error detected in my entire code. Have anyone encountered something like this before and how did you guys fixed it?