When a user closes a JFrame by clicking the Close button in the upper-right corner, the default behavior is for the JFrame to close and the application to terminate.

Question

Quizplus · Accepted Answer

The default behavior when a user clicks the Close button of a JFrame is for the JFrame to be hidden (the default close operation is `HIDE_ON_CLOSE`), not for the application to terminate. To make the application terminate, you must explicitly set the JFrame's default close operation to `EXIT_ON_CLOSE` using `setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)`.

When a User Closes a JFrame by Clicking the Close