Home
Blogs
Forums
News
Portfolios
Projects
Tutorials
32 users logged in
New? Learn about game development.
Before posting, review our community guidelines.
Follow Us
Chat in the GameDev.net Discord!
Mastodon
Back to For Beginners

Event Listener Exceptions

Started by
2 comments, last by Stani R 10 years, 7 months ago

When I override some Key Listener code with:


    @Override
    public void keyPressed(KeyEvent e) {
        Object source = e;
        System.out.print(e);
        throw new UnsupportedOperationException("Not supported yet.");
    }

I get a crazy list of exceptions that I have no idea how to fix or where it came from. I get the output that I'm looking for, though, so I could ignore it, but I'd rather know what's going on. Any help?

Some exceptions for pressing the h key, then the v key:




java.awt.event.KeyEvent[KEY_PRESSED,keyCode=72,keyText=H,keyChar='h',keyLocation=KEY_LOCATION_STANDARD,rawCode=72,primaryLevelUnicode=104,scancode=35,extendedKeyCode=0x48] on frame0Exception in thread "AWT-EventQueue-0" java.lang.UnsupportedOperationException: Not supported yet.
 at pong.Pong.keyPressed(Pong.java:47)
 at java.awt.Component.processKeyEvent(Component.java:6463)
 at java.awt.Component.processEvent(Component.java:6282)
 at java.awt.Container.processEvent(Container.java:2229)
 at java.awt.Window.processEvent(Window.java:2022)
 at java.awt.Component.dispatchEventImpl(Component.java:4861)
 at java.awt.Container.dispatchEventImpl(Container.java:2287)
 at java.awt.Window.dispatchEventImpl(Window.java:2719)
 at java.awt.Component.dispatchEvent(Component.java:4687)
 at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1895)
 at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:762)
 at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1027)
 at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:899)
 at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:727)
 at java.awt.Component.dispatchEventImpl(Component.java:4731)
 at java.awt.Container.dispatchEventImpl(Container.java:2287)
 at java.awt.Window.dispatchEventImpl(Window.java:2719)
 at java.awt.Component.dispatchEvent(Component.java:4687)
 at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:735)
 at java.awt.EventQueue.access$200(EventQueue.java:103)
 at java.awt.EventQueue$3.run(EventQueue.java:694)
 at java.awt.EventQueue$3.run(EventQueue.java:692)
 at java.security.AccessController.doPrivileged(Native Method)
 at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
 at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
 at java.awt.EventQueue$4.run(EventQueue.java:708)
 at java.awt.EventQueue$4.run(EventQueue.java:706)
 at java.security.AccessController.doPrivileged(Native Method)
 at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
 at java.awt.EventQueue.dispatchEvent(EventQueue.java:705)
 at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
 at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
 at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
 at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
 at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
 at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
Exception in thread "AWT-EventQueue-0" java.lang.UnsupportedOperationException: Not supported yet.
 at pong.Pong.keyTyped(Pong.java:41)
 at java.awt.Component.processKeyEvent(Component.java:6460)
 at java.awt.Component.processEvent(Component.java:6282)
 at java.awt.Container.processEvent(Container.java:2229)
 at java.awt.Window.processEvent(Window.java:2022)
 at java.awt.Component.dispatchEventImpl(Component.java:4861)
 at java.awt.Container.dispatchEventImpl(Container.java:2287)
 at java.awt.Window.dispatchEventImpl(Window.java:2719)
 at java.awt.Component.dispatchEvent(Component.java:4687)
 at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1895)
 at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:762)
 at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1027)
 at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:899)
 at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:727)
 at java.awt.Component.dispatchEventImpl(Component.java:4731)
 at java.awt.Container.dispatchEventImpl(Container.java:2287)
 at java.awt.Window.dispatchEventImpl(Window.java:2719)
 at java.awt.Component.dispatchEvent(Component.java:4687)
 at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:735)
 at java.awt.EventQueue.access$200(EventQueue.java:103)
 at java.awt.EventQueue$3.run(EventQueue.java:694)
 at java.awt.EventQueue$3.run(EventQueue.java:692)
 at java.security.AccessController.doPrivileged(Native Method)
 at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
 at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
 at java.awt.EventQueue$4.run(EventQueue.java:708)
 at java.awt.EventQueue$4.run(EventQueue.java:706)
 at java.security.AccessController.doPrivileged(Native Method)
 at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
 at java.awt.EventQueue.dispatchEvent(EventQueue.java:705)
 at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
 at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
 at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
 at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
 at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
 at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
Exception in thread "AWT-EventQueue-0" java.lang.UnsupportedOperationException: Not supported yet.
 at pong.Pong.keyReleased(Pong.java:52)
 at java.awt.Component.processKeyEvent(Component.java:6466)
 at java.awt.Component.processEvent(Component.java:6282)
 at java.awt.Container.processEvent(Container.java:2229)
 at java.awt.Window.processEvent(Window.java:2022)
 at java.awt.Component.dispatchEventImpl(Component.java:4861)
 at java.awt.Container.dispatchEventImpl(Container.java:2287)
 at java.awt.Window.dispatchEventImpl(Window.java:2719)
 at java.awt.Component.dispatchEvent(Component.java:4687)
 at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1895)
 at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:762)
 at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1027)
 at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:899)
 at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:727)
 at java.awt.Component.dispatchEventImpl(Component.java:4731)
 at java.awt.Container.dispatchEventImpl(Container.java:2287)
 at java.awt.Window.dispatchEventImpl(Window.java:2719)
 at java.awt.Component.dispatchEvent(Component.java:4687)
 at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:735)
 at java.awt.EventQueue.access$200(EventQueue.java:103)
 at java.awt.EventQueue$3.run(EventQueue.java:694)
 at java.awt.EventQueue$3.run(EventQueue.java:692)
 at java.security.AccessController.doPrivileged(Native Method)
 at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
 at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
 at java.awt.EventQueue$4.run(EventQueue.java:708)
 at java.awt.EventQueue$4.run(EventQueue.java:706)
 at java.security.AccessController.doPrivileged(Native Method)
 at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
 at java.awt.EventQueue.dispatchEvent(EventQueue.java:705)
 at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
 at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
 at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
 at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
 at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
 at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
java.awt.event.KeyEvent[KEY_PRESSED,keyCode=86,keyText=V,keyChar='v',keyLocation=KEY_LOCATION_STANDARD,rawCode=86,primaryLevelUnicode=118,scancode=47,extendedKeyCode=0x56] on frame0BUILD SUCCESSFUL (total time: 1 minute 2 seconds)
Advertisement
Ummm... It's your exception, you are the one throwing it.

Remove the throw statement and it will go away.

Huge Collection of Game Development Tutorials || Getting Started? Start Here

Oh... NetBeans put it in there for me when I made the override, and I assumed it showed what it could throw, not TO throw it... Thanks!

The declaration of what exceptions a method can throw are part of the method's signature, not part of the method's body. It's also written a bit differently: "throws Exception" vs "throw new Exception()" - the first describes the method, the second creates a new exception object and throws it.

This topic is closed to new replies.

Advertisement

Popular Topics

Aybe One
How do you manage yourself and your time as years pass on? GDNet Lounge
Jikoob
Too many managers? General and Gameplay Programming
ReignOnU
Do your part to stop global warming and climate change GDNet Lounge
aigan
The promise of freedom in story games Game Design and Theory
robertrobert
Facebook Ads for sales on steam, does it work? Games Business and Law
AliAbdulKareem
Understanding the wavy-like shape in alpha-testing magnification for text rendering Graphics and GPU Programming
Advertisement

Recommended Tutorials

Myopic Rhino
Interview with Tom Fulp Interviews
Gaiiden
The Core Mechanics of Influence Mapping Artificial Intelligence
Myopic Rhino
Large Animal Interviews
Myopic Rhino
Code on the Cob Part 4 General and Gameplay Programming
Myopic Rhino
The Simple DirectMedia Layer from a WIN32 Perspective, Part 2: SDL Video Engines and Middleware

Reticulating splines

About GameDev.net
Community Guidelines
Terms of Service
Privacy Policy
Contact Us
Copyright (c) 1999-2024 GameDev.net, LLC
Back to Top