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Increment a character...

 
Michael Mendelson
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Here's a relatively simple question:
I'm writing a test class for a HashMap. I would like to generate sequential keys "A", "B", "C" etc...
Although the String and Character have a wide variety of methods, I have not found a good way to do this. Suggestions?
(If anyone was wondering, the way to do this in VB is s = chr(asc(s)+1). Thanks for helping with my retooling efforts.)
 
Matthew Jones
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I beleive you can just increment a char type variable using:
char letters;
letters++;
char is kind of a weird data type, you can increment it like an int, but when you use it, it will find the char value for the int, using Unicode values (I believe).
Hope this helps!
 
David Harrigan
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Matthew is correct. You can increment a char like a normal int. So,
char c = 'A';
c++;
will work.
Don't forget, if you want to use the char as a key in a hashmap, you need to convert it to an object first! Here is a bit of code to do so:-
--
HashMap h = new HashMap();
char c = 'A';
Character co = Character(c);
h.put(co, "Hello There!");
--
David.
 
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