How to make a decision structure to close a window?

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How to make a decision structure to close a window?

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#1 by (1 votes)
#2 by (0 votes)

2

In the code below, I want you to choose% while the window closes, and when choosing sim the window remains open.

private void formWindowClosing(java.awt.event.WindowEvent evt) {                                   
    // TODO add your handling code here:

    int Confirm = JOptionPane.showConfirmDialog(null,"Encerrar?","sim ou nao", JOptionPane.YES_NO_OPTION);
    if (Confirm == JOptionPane.YES_OPTION) {
        JOptionPane.showMessageDialog(null, "");
        System.exit(0);
    } else if (Confirm == JOptionPane.NO_OPTION){
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

    }
}

It does not give any error, the problem is that choosing não the window closes. Until then correct, but choosing sim it closes the same way.

java swing

asked by anonymous 29.05.2014 / 20:46

2 answers

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score 1 · Answer 1

You have to use YES_NO_OPTION, try the code snippet below, which I took from an old project of mine. Any doubt is just to return. Hugs

frame.addWindowListener(new WindowAdapter() {
        @Override
        public void windowClosing(java.awt.event.WindowEvent windowEvent) {
            if (JOptionPane.showConfirmDialog(frame, 
                "Titulo", "Tem certeza ?", 
                JOptionPane.YES_NO_OPTION,
                JOptionPane.QUESTION_MESSAGE) == JOptionPane.YES_OPTION){
                System.exit(0);
            }
        }
    });

score 0 · Answer 2

I create a private method (Private void), ConfirmSaid, and then only invoke it every time I need to use the formWindowClosing or KeyPressed Events sometimes, so your system saves code and gets smaller and easier to understand =).

private void ConfirmarSaida(){

        JOptionPane sair = new JOptionPane();
        int Sair = sair.showConfirmDialog(null,"Você deseja sair do programa?","Sair",JOptionPane.YES_NO_OPTION);
      if(Sair == JOptionPane.YES_OPTION){
       //    System.exit(0);
       this.dispose();

      }else{
         if(Sair == JOptionPane.NO_OPTION){

         }
      }


}

Ah! and do not forget to configure the JFrame or JInternalFrame, or change the SetDefaultCloseOperation to DO_NOTHING, so when you click on the X of the window it will only use your JOptionPane if you leave DISPOSE or EXIT_ON_CLOSE on SetDefaultCloseOperation, it will close even if you click not on JOptionPane on the conditional exit.

I hope to help with something.