Count similar characters in a String

[Anjali S Sharma]

I have a String such as

String s = "sssssaaagg";

I need to count the number ot times each character is repreated. In this case
s-5
a-3
g-2
Please give me some pointers as to how should I proceed it.

[Ulf Dittmer]

You can iterate through all the characters like this:

for (int i=0; i<s.length; i++) {
char ch = s.charAt(i);
...
}

For the result, keep a HashMap with the character as key and the number of its occurrences as the value.

[madhup narain]

hi..
ever heard of charAt in the String class ....

try it
Regards

[Jeffrey Spaulding]

You could

* travel through the String char-per-char,
* use the char you have in hand as a key to a Hashmap
* and store the tally for this key as value in the Hashmap

But i'm sure there are a million other possibilities

What do the other cowboys think ?

J.

[Anjali S Sharma]

Thanks a lot.

[Layne Lund]

Do you need to count the occurence of adjacent repeated characters? Or just the count of each unique character in the word? Either way, the above hints should provide a place to start. If you get stuck, please let us know what you have tried and we can help from there.

Layne