Processing-NullPointerException when converting string to char

Question

So I have a set of different strings made if a certain key is pressed using keyPressed(), but some of those strings i want to convert to characters and tried doing so like this:

char keyChar = keyChanged.charAt(0);

except now i get a nullpointerexpression. if it matters, keyChanged would be a 1 letter string like "r".

Possible duplicate of [What is a Null Pointer Exception, and how do I fix it?](http://stackoverflow.com/questions/218384/what-is-a-null-pointer-exception-and-how-do-i-fix-it) — Yosef Weiner, Dec 04 '15 at 13:08

score 0 · Accepted Answer · answered Dec 04 '15 at 13:22

0

You can avoid a NullPointerException like this:

if (keyChanged != null){   
  char keyChar = keyChanged.charAt(0); 
}

answered Dec 04 '15 at 13:22

Andrea Dusza

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I found a simpler solution but this wouldve worked too i believe! – Muhammad Shahab Dec 04 '15 at 13:24

score 0 · Answer 2 · answered Dec 04 '15 at 13:23

0

Solved it, It was pretty stupid on my part, I just set the original keyChanged variable as a character instead.

answered Dec 04 '15 at 13:23

Muhammad Shahab

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Processing-NullPointerException when converting string to char

2 Answers2