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  1. #1
    alwin is offline Member
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    May 2008
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    Default trying to do a cumulative addition and getting a null pointer exception

    if (a!= null ){
    b.setClaSubBalance(new Double(b.getClaSubBalance().doubleValue() + a.getClaSubBalance().doubleValue()));
    where a and b are objects of a class.

    In the very first loop the values in b will be null. How can I handle this.

  2. #2
    JT4NK3D's Avatar
    JT4NK3D is offline Member
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    Nov 2007
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    I really don't understand that thing in brackets but why not just give b an initial value of 0 or something?
    You just got T4NK3D!
    Adonrcicg to rcesraeh the haumn mnid is clbapae of rdanieg tihs. -Jvaa Sun Moricyssemts-

  3. #3
    chaster is offline Member
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    Mar 2008
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    What a surprise :) a and b are objects of calsses...
    Have you tried:
    TypeOfB = new TypeOfB(params);
    That will initialize variable b, which is not null anymore.

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