import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JFrame;
public class CloseFrameAction extends JFrame {
public CloseFrameAction() {
setTitle("CloseableFrame");
setSize(300, 200);
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
}
public static void main(String[] args) {
JFrame frame = new CloseFrameAction();
frame.show();
}
}
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