• 4
    Dang is that BlueJ? I haven't used that since highschool.

    I think that function isn't defined for that class, maybe. But yeah it's a silly error message xD
  • 1
    Oh no it's BlueJ! Have a big RIP from me
  • 0
    I really like the block style background coloring there. Do you know if there is like a plugin for vs code or something?
  • 0
    Need to use this in school, first thing I did is install Intelij
  • 1
    It says ActionListener::setVisible(boolean) doesn't exist but there is some other setVisible(boolean) in the outer class. Removing the 'this.' should fix it.
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