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I’m trying to set an attribute that’s a vector, and it’s in a class y, but I have a class x, which consists of this class y.
At the time I write the code there is no error, but when executing the following error appears to me:
error: Exception in thread "main" java.lang.Nullpointerexception at Ordering.milkMassas(Request.java:80)
how can I fix this?
Class y:
Class x:
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The mistake:
Exception in thread "main" java.lang.Nullpointerexception at Ordering.milkMassas(Request.java:80)
means that you are trying to do some operation on an object that is null! I usually say that it is the simplest error to be corrected in java, because it directs us exactly to that object! ;)
In the case of your code, your object "massas", in row 80 of the "Order" class (Class X) is void and you are trying to add a description to it.
Since I couldn’t test your code, I can just give you the hint to initialize your object before setting attributes on it.
A simple Massas massas = new Massas(); before the 80 line would solve your problem.
Good afternoon Dante, Thank you very much for the information, that’s right. Problem solved. I’m sorry I didn’t put the code, I’m new here and I didn’t know, but next time I do. !
You’re welcome, man! Mark my answer as correct and go? ;)
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Where the variable
massasis it stated? What does it do? Please post your entire code, and for God’s sake post your code as text and not as images!– Victor Stafusa
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