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Index › Programming Questions & Help › Syntax Questions › null pointer error
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null pointer error (Read 507 times)
charlie04
null pointer error
Sep 1st, 2007, 5:15pm  
Hey
I can't figure out why I'm getting an error
java.lang.NullPointerException
it keeps syaing the error is happening here

albums[0].setPosition(int(xpos+sin(anglealbums+angle)*radius),int(ypos+cos(anglealbums+an
gle)*radius));
    image(b, xpos+sin((2*anglealbums)+angle)*radius, ypos+cos((2*anglealbums)+angle)*radius);
    albums[1].setPosition(int(xpos+sin(2*anglealbums+angle)*radius),int(ypos+cos(2*anglealbum
s+angle)*radius));
    image(c, xpos+sin((3*anglealbums)+angle)*radius, ypos+cos((3*anglealbums)+angle)*radius);
    albums[2].setPosition(int(xpos+sin(3*anglealbums+angle)*radius),int(ypos+cos(3*anglealbum
s+angle)*radius));
    image(d, xpos+sin((4*anglealbums)+angle)*radius, ypos+cos((4*anglealbums)+angle)*radius);
    albums[3].setPosition(int(xpos+sin(4*anglealbums+angle)*radius),int(ypos+cos(4*anglealbum
s+angle)*radius));
    image(e, xpos+sin((5*anglealbums)+angle)*radius, ypos+cos((5*anglealbums)+angle)*radius);
    albums[4].setPosition(int(xpos+sin(5*anglealbums+angle)*radius),int(ypos+cos(5*anglealbum
s+angle)*radius));
    image(f, xpos+sin((6*anglealbums)+angle)*radius, ypos+cos((6*anglealbums)+angle)*radius);
    albums[5].setPosition(int(xpos+sin(6*anglealbums+angle)*radius),int(ypos+cos(6*anglealbum
s+angle)*radius));
   
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extrapixel
Re: null pointer error
Reply #1 - Sep 2nd, 2007, 12:06pm  
so, at least one of the varibales you're accessing is Null.

Try to find which of your variables does not yet have an assigned value. Just start debugging using println(variable) to find which one(s) is/are causing trouble.
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charlie04
Re: null pointer error
Reply #2 - Sep 2nd, 2007, 1:07pm  
got it thanks!
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