java Run-length encoding

Question

I have no idea how to start my assignment.

We got to make a Run-length encoding program,

for example, the users enters this string:

aaaaPPPrrrrr

Answer 1

For example, if the input string is “wwwwaaadexxxxxx”, then the function should return “w4a3d1e1x6”.

Source Code (Java):-

package com.algo.runlengthencoding;


public class RunlengthEncoding 
{

    // For example, if the input string is “wwwwaaadexxxxxx”,
    // then the function should return “w4a3d1e1x6”.

    public static void main(String args[]) {

        String str = "aaaabbbccffffdffffddeeffffff";

        String value = getRunLengthEncodingForGivenString(str);
        System.out.println(value);
    }

    public static String getRunLengthEncodingForGivenString(String str) {
        String value = "", compare = "";

        for (int i = 0; i < str.length(); i++) {
            CharSequence seq = str.charAt(i) + "";

            if (compare.contains(seq))
                continue;

            compare = compare + str.charAt(i);

            int count = 0;
            for (int j = 0; j < str.length(); j++) {
                if (str.charAt(i) == str.charAt(j))
                    count = count + 1;
            }

            value = value + str.charAt(i) + Integer.toString(count);
        }
        return value;
    }

}