Error « Event « Java Swing Q&A

1. NullPointerException when running multiple Action events stackoverflow.com

Purpose of the code : Create two Buttons(button1 and button2). When User clicks button1, change the text of button2. When User clicks button2, change the text of button1. Here's the code I'm ...

2. ActionListener error stackoverflow.com

I'm reworking my code here and I get the following errors:

Exception in thread "main" java.lang.Error: 

Unresolved compilation problem:     

The method addActionListener(new ActionListener(){}) is undefined for the type ...

3. error MouseMotionListener, MouseListener stackoverflow.com

I am getting an error :

AniWorld is not abstract and does not override abstract method mouseMoved(MouseEvent) in MouseMotionListener
public class AniWorld extends  Applet implements MouseMotionListener, MouseListener

The code is:

 import java.awt.*;
import java.lang.*;
import ...

4. Error occured during event dispathching coderanch.com

NullPointerException is one of the most common Runtime exceptions people get. this usally means u r trying to use a method or to access a refrence variable that is pointing to null rather than an object. usually this means that u just forgot to create an object and u r trying to run methods on it, like this: Button x; x.setForeground(Color.red); ...

5. MouseListener error coderanch.com

import javax.swing.*; import java.sql.*; import java.io.*; import java.awt.*; import java.awt.event.*; import java.util.*; import java.applet.*; public class test implements MouseListener { //Question one JLabel qOne; //Answer one JLabel aOne; public static void main(String[] args) { new test(); } public test(){ //The window with the name on top JFrame window = new JFrame("FAQ"); window.setBounds(100,100,400,300); window.getContentPane().setLayout(null); window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //Question one qOne = new JLabel(); qOne.setBounds(30,10,100,30); ...

6. exception error in a ActionListener class java-forums.org

I am having an issue with one of the GUIs I am currently working on. The GUI itself works fine, but the actionlistener tied to it, keeps coming up with exception errors. The listener is used to create an instance of a seperate class that connects to, accesses, and returns data from a database. All of the database functions are kept ...