CODEWITHSUNDEEP
javaswingjbuttonjoptionpane
Mazzy
Mazzy

Reputation: 14179

How to handle cancel button in JOptionPane

I had created a JOptionPane of type showInputDialog. When it opens it, it shows me two buttons: OK and Cancel. I would like to handle the action when I push on Cancel button, but I don't know how to reach it. How can I get it?

Upvotes: 14

Views: 85790

Answers (7)

Athit See
Athit See

Reputation: 1

This may be your answer:

package Joptionpane;

import javax.swing.JOptionPane;
    
public class Cancle_on_JOptionPane {

    public static void main(String[] args) {
        String s;
        int i;
        // Set the process limit to any number, that use when you need to use for comparability and limited to get out of the program when the answer is correct.(in this case is 100)
        for(i=0;i<100;i++){
        s = JOptionPane.showInputDialog(null,"What is your favorite fruit ?");
                        // Resolve process by compare answer with character to got the right answer, If it's no character it would show question box until user type answer or click cancel.
                        try{      
                                 if(s.equals(""))  {
                                                            JOptionPane.showMessageDialog(null," Enter your answer !!!"," ^-^ Information^-^ ",JOptionPane.INFORMATION_MESSAGE);
                                                            i=2; // Set i=2 to repeating question box loop until user give answer.
                                                       }
                                 else  {
                                           JOptionPane.showMessageDialog(null," s = "+s," ^-^ Information^-^ ",JOptionPane.INFORMATION_MESSAGE);
                                           i=100; // Get out from question box when the variable is not empty.
                                         }
                            }
        catch(Exception e)
              {
                 JOptionPane.showMessageDialog(null,"Cancle answer !!!"," ^-^ Information^-^ ",JOptionPane.INFORMATION_MESSAGE);
                 i=100; // Get out from question box when user click cancel and showing "cancel message", You can link to another action here.
              }
     }
   }
}

Upvotes: -2

Adel
Adel

Reputation: 6258

showInputDialog return NULL if you click cancel and String object even if it's empty. So all you need to do is test if it's Null and if it's not empty.

Upvotes: 0

Kjell
Kjell

Reputation: 91

This is an old question, and I am an Java newbie so there might be better solutions, but I wanted to know the same, and maybe it can help others, what I did was to check if the response was null.

If the user clicks "cancel", the response will be null. If they click "ok" without entering any text the response will be the empty string.

This worked for me:

//inputdialog 
    JOptionPane inpOption = new JOptionPane();

    //Shows a inputdialog
    String strDialogResponse = inpOption.showInputDialog("Enter a number: "); 

    //if OK is pushed then (if not strDialogResponse is null)
    if (strDialogResponse != null){

        (Code to do something if the user push OK)  

    }
    //If cancel button is pressed
    else{

        (Code to do something if the user push Cancel)

    }

Upvotes: 9

emendescv
emendescv

Reputation: 1

You could do it like this:

String val = JOptionPane.showInputDialog("Value: ");
if(val == null){
  // nothing goes here if yo don't want any action when canceled, or
  // redirect it to a cancel page if needed
}else{
  //insert your code if ok pressed
  // JOptionPane return an String, as you was talking about int
  int value = Integer.ParseInt(val);
}

Upvotes: 0

hamooda aburezk
hamooda aburezk

Reputation: 1

package Joptionpane;

import javax.swing.JOptionPane;

public class Cancle_on_JOptionPane {

    public static void main(String[] args) {
        String s;
        int i;
        for (i=0;i<100;i++){
            s = JOptionPane.showInputDialog(null,"What is your favorite fruit ?");
            try {
                if (s.equals("")) {
                    JOptionPane.showMessageDialog(null," Enter your answer !!!"," ^-^ Information^-^ ",JOptionPane.INFORMATION_MESSAGE);
                    i=2;
                } else {
                    JOptionPane.showMessageDialog(null," s = "+s," ^-^ Information^-^ ",JOptionPane.INFORMATION_MESSAGE);
                    i=100;
                }
            }
            catch (Exception e) {
                JOptionPane.showMessageDialog(null,"Cancle answer !!!"," ^-^ Information^-^ ",JOptionPane.INFORMATION_MESSAGE);
                i=100;
            }
        }
    }
}

Upvotes: -1

tenorsax
tenorsax

Reputation: 21223

For example: 

int n = JOptionPane.showConfirmDialog(
                            frame, "Would you like green eggs and ham?",
                            "An Inane Question",
                            JOptionPane.YES_NO_OPTION);
if (n == JOptionPane.YES_OPTION) {

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

} else {

}

Alternatively with showOptionDialog: 

Object[] options = {"Yes, please", "No way!"};
int n = JOptionPane.showOptionDialog(frame,
                "Would you like green eggs and ham?",
                "A Silly Question",
                JOptionPane.YES_NO_OPTION,
                JOptionPane.QUESTION_MESSAGE,
                null,
                options,
                options[0]);
if (n == JOptionPane.YES_OPTION) {

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

} else {

}

See How to Make Dialogs for more details.

EDIT: showInputDialog

String response = JOptionPane.showInputDialog(owner, "Input:", "");
if ((response != null) && (response.length() > 0)) {

}

Upvotes: 26

Hovercraft Full Of Eels
Hovercraft Full Of Eels

Reputation: 285405

The showMessageDialog, shouldn't show two buttons, so something is amiss with either your code or your interpretation of it. Regardless, if you want to give the user an choice and want to detect that choice, don't use a showMessageDialog but rather a showConfirmDialog, and get the int returned and test it to see if it is JOptoinPane.OK_OPTION.

Upvotes: 6

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