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keep gettin errors...dont know why

apu95

Caffeine-->Code Converter
#1
im makin a small graphing app in java.
u can graph any kind of polynomial as long as u input something in the correct field (so for a quadratic function x2+3, u put something in the a, b, n parts, and x in the 2 field, and 3 in the 1 field).

anyways, when i run it, it compiles and runs, but when i click the button i made to actually graph the thing, it gives me a ton of java.lang.NullPointerException
errors. it prolly is really easy to correct, but ive no idea where to begin.

any ideas?

thx!
Apu

PS: .java file included just in case
 

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