frame.dispose() method error

Question

I want to implement a code that dipose the JFrame that is open. Searched through multiple questions here in stackoverflow, but I still get an error message for this code

Returns_Show_Data.setDefaultCloseOperation(JFrame.HIDE_ON_CLOSE);

Error: Non-static method setDefaultCloseoperation(int) cannot be referenced from a static context… I also tried:

Returns_Show_Data.dispose();

And it also says the same.

Thanks in advance.

Answer 1

You're making this method call:

Returns_Show_Data.setDefaultCloseOperation(JFrame.HIDE_ON_CLOSE);

on a class, Returns_Show_Data, and this is not allowed, as the error message tells you. Instead you must call it on the valid Returns_Show_Data instance that your application is displaying.

Having said that, it smells as if you're planning on opening and closing various JFrames, and if so, please don't as this can be very annoying to the user to have windows flung at them. Instead, consider swapping views in one main GUI JFrame via a CardLayout.

If you do need to show a temporary window, consider using a JDialog and not a JFrame, and then creating the dialog in such a way that binds it to your JFrame.