Messages

1

Programming / Updating my world

« on: October 17, 2012, 05:13:11 PM »

I'm extreemly new to roguelike dev, and java game dev in general. I'm following Trystan's roguelike guide but am finding i'm running into trouble.

I have set up a feature where the "Fungus" spreads on the update meathod. The fungus is spreading correctly but i'm getting an error in my build output

Exception in thread "AWT-EventQueue-0" java.util.ConcurrentModificationException
   at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
   at java.util.AbstractList$Itr.next(AbstractList.java:343)
   at Roguelike_Dev.World.update(World.java:69)
   at Roguelike_Dev.screens.PlayScreen.respondToUserInput(PlayScreen.java:123)
   at Roguelike_Dev.ApplicationMain.keyPressed(ApplicationMain.java:33)
   at java.awt.Component.processKeyEvent(Component.java:6225)
   at java.awt.Component.processEvent(Component.java:6044)
   at java.awt.Container.processEvent(Container.java:2041)
   at java.awt.Window.processEvent(Window.java:1836)
   at java.awt.Component.dispatchEventImpl(Component.java:4630)
   at java.awt.Container.dispatchEventImpl(Container.java:2099)
   at java.awt.Window.dispatchEventImpl(Window.java:2478)
   at java.awt.Component.dispatchEvent(Component.java:4460)
   at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1850)
   at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:712)
   at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:990)
   at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:855)
   at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:676)
   at java.awt.Component.dispatchEventImpl(Component.java:4502)
   at java.awt.Container.dispatchEventImpl(Container.java:2099)
   at java.awt.Window.dispatchEventImpl(Window.java:2478)
   at java.awt.Component.dispatchEvent(Component.java:4460)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

After much playing around, i realized that my character "@" is not being updated and redrawn when the error occurs, only the fungus is being printed.

After this error occuring multiple times, the Character refuses to move (not sure if it won't update or won't redraw) I'm assuming it has to do with a List going out of bounds?

Anybody that is fimiliar with this tutorial or with this error in general please help me out? I can upload my project files somewhere if need be