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Thread: Java letter frequency

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    Default Java letter frequency

    Could someone give me some suggestions on how I could code a program that go through a string and determine the frequency of each letters? I can't use char so the only thing I have left is array. I was thinking of going comparing the substring of the string 1 by 1 and each time it match a letter in the alphabet array, I would make the letter counter to be ++. But this would mean I have to create 26 different int variable to keep count of the individual letters. Any ideals on how I can avoid making 26 counter variable for the letter? Thanks. (I would provide the code but the current code I have consist of the 26 variable which is not much useful)

    ** I thought of something, I will edit the post with the code in a few min.


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    Default Re: Java letter frequency

    how I can avoid making 26 counter variable
    Use an array.

    I can't use char
    Does that mean you can only work with Strings?

    Are you using java version 1.7? It allows Strings in switch statements.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Java letter frequency

    I used your suggestion of using an array. It worked. Thanks you so much for the suggestion!

    -Can you help me figure out why percent[x] is giving me 0.00? Thanks
     int total = 0 ;
            for(int i = 0 ; i < rate.length; i++)
            {
                total += rate[i];
            }
            double [] percent = new double[26];
            System.out.println("Total is "+total);
            System.out.println("Rate at [0] is " + rate[0]);
            for(int x = 0 ; x < rate.length;x++)
            {   
                percent[x] = (rate[x] / total);          
            }
     
            System.out.println("Percent at [0] is "+percent[0]);

    Total is 52
    Rate at [0] is 7
    Percent at [0] is 0.0

    ** It work when I cast rate[] to an int but why does this occur? Isn't the percent[] is a double so wouldn't it result in a double without me casting the rate[]?

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