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This cannot be this hard. If that line is still causing the NPE, then there are two probable causes: 1) parent is null 2) e is null Seeing as 2) won't happen, parent has to be VBulletin, Copyright 2000 - 2016, Jelsoft Enterprises Ltd. more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed

How to make use of action listeners in a different class? posted 9 years ago Can you repost your code now that you have fixed a few things? Seeing as you set it correctly in the constructor, it must be the value passed to the constructor. Calling toString() on a null reference however will throw a NullPointerException. Homepage

Java Actionlistener Not Responding

How to prove that authentication system works, and that the customer is using the wrong password? share|improve this answer answered Nov 23 '12 at 11:10 msell 5,22911937 Using is the most robust and flexible way to handle events on any components in Swing. Better add your JLabel to the Center instead of North, so that it can fill the maximum area on the component. The objective is to - change color of button when the button is clicked - initially all 3 of them are black The code runs perfectly except for the color of

I am a native speaker of English but often make typos. import java.awt.Color; import java.awt.GridLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; public class gui extends JFrame implements ActionListener { JPanel p1, p2, p3; JButton b1, b2, b3; public Started in June 2010 Reply With Quote « String/loop problem | Linked list with Headers & Trailers » Similar Threads ActionListener NOT working By zed420 in forum New To Java Actionperformed up vote 3 down vote favorite Folks, I intend to implement a simple button ActionListener but it appears to not work.

You already have a visible frCollectionsJAC frame. Animated plot required to leave behind trace Can I sell a stock immediately? Why Would the President-elect have a Transition Visit before December 19? http://stackoverflow.com/questions/12364634/why-java-actionlistener-is-not-working Browse other questions tagged java swing actionlistener or ask your own question.

How do you instantiate your CollectionsJAC? Java Actionlistener Example Any more suggestions. Do electronics distributers test each component before sending them out? US Election results 2016: What went wrong with prediction models?

Java Jbutton Actionlistener Not Working

Does the Rothschild family own most central banks? https://coderanch.com/t/629835/java/jButton-actionlistener-working Therefore, use Key Bindings and Action Maps, which simply add to the swing thread. Java Actionlistener Not Responding Since you are never adding your JButton to your JFrame, you cannot generate an ActionEvent. Java Jbutton Not Working Would the members of an online imageboard (or any community) be able to build a post-apocalytic society upon their reputation?

Much appreciated. Did I cheat? package Collections; import javax.swing.*; import java.awt.*; import java.awt.event.*; import javax.swing.*; import java.util.*; import java.awt.event.ActionListener; public class CollectionsJAC implements ActionListener { JTextArea text; JFrame frCollectionsJAC; JPanel pnCollectionsJAC; JButton bnJK, bnMCCR, btn1; private You can add your functionality here. Listener Not Working Java

Thank you Post Reply Bookmark Topic Watch Topic New Topic Similar Threads Best approach for CardLayout URGENT PLEASE How to call JDialog Communicating b/w Screens Table Cell Renderer All times It's losing the button. Here's how I implemented it, the other buttons don't do a thing quite yet. Discover how it works, and always use it.

That was a copy/paste mistake here. Can leaked nude pictures damage one's academic career? I've added two JButton to a main JPanel and added an ActionListener for each of them.

Your class has to implement ActionListener e.g.

That's how it looks - Main -> JPanel -> JButton, JButton, JPanel which contains the game and keyPressed function inside KeyController class which worked fine before I added the ActionListener for From your code i don't see any error –Festus Tamakloe Feb 21 '13 at 9:30 Consider to use an Action object to configure your menu item: docs.oracle.com/javase/7/docs/api/javax/swing/Action.html –Puce Feb I want to select that JButton and have it open my other class in the same package. A stupid cipher?

Why does this work?-4Java ActionListener not responding7Java JMenuItem ActionListener3How can I implement ActionListener with a non abstract class? How do I write matrices inside of brackets (i.e., matrices in a set) How to respond when someone praises about my Japanese? You may also need to call enableEvents(AWTEvent.KEY_EVENT_MASK); in the initialization. Integral Polynomial divide N!