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Index › Programming Questions & Help › Syntax Questions › Little Boring Erro
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Little Boring Erro (Read 306 times)
marteiro
Little Boring Erro
Mar 12th, 2009, 1:21am  
I'm gettim this crazy error on this simple code...

i realy don't know what's happening

code:

class objs{
 int marcelo;
 float mariana;
}

objs[] sa1 = new objs[256];

sa1=(objs[])splice(sa1,sa1[5],3);


error:


Exception in thread "Animation Thread" java.lang.NullPointerException
at processing.core.PApplet.splice(PApplet.java:4885)
at teste.setup(teste.java:23)
at processing.core.PApplet.handleDraw(PApplet.java:1400)
at processing.core.PApplet.run(PApplet.java:1328)
at java.lang.Thread.run(Thread.java:637)


thanks people
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PhiLho 
Re: Little Boring Erro
Reply #1 - Mar 12th, 2009, 12:52pm  
Classical error:
int[] ia = new int[256];
will indeed create 256 ints initialized with 0, usable immediately.

objs[] sa1 = new objs[256];
will create 256 null references to yet to create objs instances. So any use of these null references will throw an NPE.
You have to add a loop to create 256 new instances of objs and assign them to the array slots.
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