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Java-Gaming.org > Game Development > Newbie & Debugging Questions > My logic is baffled
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  My logic is baffled  (Read 476 times)
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Offline minosu

JGO n00b
*

Posts: 5
« on: 2012-01-13 17:58:13 »
just out of curiousity howcome i get a nullpointerexception...

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Animation animation;
      
animation = new Animation(true);//runR
animation.addFrame(2, 140);
animation.addFrame(4, 140);
System.out.println(animation);
animations.addAnimation(animation);


... at the last line?
Offline aazimon

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« Reply #1 on: 2012-01-13 18:03:10 »
Where do you create animations variable?
Offline minosu

JGO n00b
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Posts: 5
« Reply #2 on: 2012-01-13 18:07:56 »
create it here? then bring it into the AnimationManager which copies it into its array of Animations.

what do you mean by 'where'?
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Offline ra4king

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Medals: 196


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« Reply #3 on: 2012-01-13 18:09:36 »
The only possible way a NPE could be thrown at that line is that the variable "animations" is null. What aazimon was asking: where do you assign the "animations" variable?
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Offline minosu

JGO n00b
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Posts: 5
« Reply #4 on: 2012-01-13 18:13:01 »
I thought
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animation = new Animation(true);//runR

is 'assigning' the 'variable'?
Offline ra4king

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« Reply #5 on: 2012-01-13 18:14:22 »
animations

This is why it is not a good idea to have two variables so closely spelled Wink
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Offline minosu

JGO n00b
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Posts: 5
« Reply #6 on: 2012-01-13 18:15:32 »
O_O
loool i'm blind ><
Offline ra4king

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« Reply #7 on: 2012-01-13 18:18:03 »
Hehehe....so was "animations" null?
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Offline minosu

JGO n00b
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Posts: 5
« Reply #8 on: 2012-01-13 18:21:48 »
yes >>

i just plain forgot... that it needed to be initiated.
Offline Cero

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« Reply #9 on: 2012-01-13 18:23:24 »
yeah call it animationList or allAnimations or something =P
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Offline ra4king

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« Reply #10 on: 2012-01-13 18:28:11 »
Teehee Smiley
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