How do I handle the JOptionPane.showMessageDialog () options?

Question

How do I handle the JOptionPane.showMessageDialog () options?

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#1 by (1 votes)

1

How do I handle user choices in JOptionPane.showMessageDialog() ? For example, when the user chooses ok the program continues normally, if he chooses cancel the program executes another line of code.

java swing gui

asked by anonymous 07.05.2014 / 16:59

1 answer

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score 1 · Accepted Answer

You should use showConfirmDialog() since showMessageDialog() does not return anything.

The showConfirmDialog() returns an int, store it, and then compare it with the static constants of the JOptionPane class. Example:

int i = JOptionPane.showConfirmDialog(
        null, 
        "Deseja continuar?"
        );
if(i == JOptionPane.YES_OPTION) {
    System.out.println("Clicou em Sim");
}
else if(i == JOptionPane.NO_OPTION) {
    System.out.println("Clicou em Não");
}
else if(i == JOptionPane.CANCEL_OPTION) {
    System.out.println("Clicou em Cancel");
}

Result:

Tochangethebuttonsinyourdialog,createtheoverloadedversionshowConfirmDialog(parentComponent,message,title,optionType)whereoptionTypecanbe:

DEFAULT_OPTION(althoughthedocumentationdoesnotmakeitclear,it'sOKalone)
YES_NO_OPTION
YES_NO_CANCEL_OPTION
OK_CANCEL_OPTION

Example:

inti=JOptionPane.showConfirmDialog(null,"Deseja continuar?",
        "Continua",
        JOptionPane.OK_CANCEL_OPTION
        );

Result:

Reference: JOptionPane - Java SE 7