Program Exits Even When Click No Or X Button On Upper Corner

Mar 31, 2015

Here is the snippet of code that is causing the problem

Java Code:

addWindowListener(new WindowAdapter()
{
@Override
public void windowClosing(WindowEvent e)
{
int confirm = JOptionPane.showOptionDialog(
VendorMachineSimulation.this,
"Are You Sure you want to close this application?",
"Exit Confirmation", JOptionPane.YES_NO_OPTION,

[Code] ....

My question is why does the snippet code at the top works in the class processAction but when I add to the main class that extends JFrame, it exits regardless if I click yes, no or the x button.

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