Question

I’m trying to learn Java so sorry if this is a stupid question, but I seem to be unable to change the default close operation on my JFrame in NetBeans.

In NetBeans I created a JFrame and implemented some controls on it using the NetBeans GUI designer. However, I noticed that after I close the JFrame, my application would close even though I have another form that is supposed to appear afterwards.

After digging through the JFrame generated code I found:

setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

From research it appears that this causes the application to close when the frame is closed. I would prefer to not have this happen. From looking around, it appears I either need to use DISPOSE_ON_CLOSE or DO_NOTHING_ON_CLOSE in order to get the window to close but still have additional code to run.

However, I can’t figure out how to get NetBeans to change this value through the designer. I found the defaultCloseOperation in the Properties -> Bindings window, but every time I enter something into the text area and press enter my text disappears. The binding has an elipsis but I can’t figure out what the binding window actually does.

How can I change my setDefaultCloseOperation() to a new value?

Answer 1

It is right there in the properties panel. Just make sure that the whole JFrame is selected. You can select your JFrame from Inspector panel.