[java] JOptionPane YES/No Options Confirm Dialog Box Issue

I've created a JOptionPane and it only has two buttons YES_NO_OPTION .

After JOptionPane.showConfirmDialog pops out , I want to click YES BUTTON to continue opening the JFileChooser and if I clicked NO BUTTON it should cancel the operation.

It seems pretty easy but I'm not sure where is my mistake.

Code Snippet:

if (textArea.getLineCount() >= 1) {  //The condition to show the dialog if there is text inside the textArea

    int dialogButton = JOptionPane.YES_NO_OPTION;
    JOptionPane.showConfirmDialog (null, "Would You Like to Save your Previous Note First?","Warning",dialogButton);

    if (dialogButton == JOptionPane.YES_OPTION) { //The ISSUE is here

    JFileChooser saveFile = new JFileChooser();
    int saveOption = saveFile.showSaveDialog(frame);
    if(saveOption == JFileChooser.APPROVE_OPTION) {

    try {
        BufferedWriter fileWriter = new BufferedWriter(new FileWriter(saveFile.getSelectedFile().getPath()));
        fileWriter.write(textArea.getText());
        fileWriter.close();
    } catch(Exception ex) {

    }
}

int opcion = JOptionPane.showConfirmDialog(null, "Realmente deseas salir?", "Aviso", JOptionPane.YES_NO_OPTION);

if (opcion == 0) { //The ISSUE is here
   System.out.print("si");
} else {
   System.out.print("no");
}

Try this,

int dialogButton = JOptionPane.YES_NO_OPTION;
int dialogResult = JOptionPane.showConfirmDialog(this, "Your Message", "Title on Box", dialogButton);
if(dialogResult == 0) {
  System.out.println("Yes option");
} else {
  System.out.println("No Option");
}