JOptionPane YES NO OPTION [duplicate]

Answer 1

if(dialogButton == JOptionPane.YES_OPTION) { // <<< start
    System.exit(0);
        if(dialogButton == JOptionPane.NO_OPTION) {
            remove(dialogButton);
        }
}// <<< stop

The result is caused by the fact that the outer if encloses the other if statement, make sure you don't next the if statement, it should be as follows : -

if(dialogButton == JOptionPane.YES_OPTION) {
    System.exit(0);
}else {
    remove(dialogButton);
}

Another thing is this line int dialogButton = JOptionPane.YES_NO_OPTION;, change it to

int dialogButton = JOptionPane.showConfirmDialog (null, "Are you sure?","WARNING", dialogButton);