I am currently
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NullPointerException when using methods to find matching chars in two arrays.
I am currently
Last edited by Javaisfrustrating; November 22nd, 2011 at 10:55 PM.
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Re: NullPointerException when using methods to find matching chars in two arrays.
This error message says you are trying to use a variable with a null value at line 52.Exception in thread "main" java.lang.NullPointerException
at DMVExam.getNumCorrect(DMVExam.java:52)
Look at line 52 and see what variable is null and backtrack to see why it does not have a valid value.
If you can not see what variable is null, add a println just before line 52 and print out the values of all the variables used in line 52.
Re: NullPointerException when using methods to find matching chars in two arrays.
You should follow Norm's advice as it explains how to track down your problems in the future without relying on others. However I have given you a hint.public DMVExam() { char[] solution =
Improving the world one idiot at a time!
Re: NullPointerException when using methods to find matching chars in two arrays.
Why don't IDEs and compilers give warnings for shadowed variable definitions?
So many students have that problem.
Re: NullPointerException when using methods to find matching chars in two arrays.
More closer hint:
class A{ private int variable; A(){ int variable; } }
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