keep gettin errors...dont know why

Discussion in 'Web Design & Coding' started by apu95, Jul 1, 2004.

  1. apu95

    apu95 Caffeine-->Code Converter

    Montreal, Canada
    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?


    PS: .java file included just in case