compressTheString.java

/*
Write a program to do basic string compression. For a character which is consecutively repeated more than once, replace consecutive duplicate occurrences with the count of repetitions.
Example:
If a string has 'x' repeated 5 times, replace this "xxxxx" with "x5".

The string is compressed only when the repeated character count is more than 1.
Note:
Consecutive count of every character in the input string is less than or equal to 9.
Input Format:
The first and only line of input contains a string without any leading and trailing spaces.
Output Format:
The output contains the string after compression printed in single line.
Note:
You are not required to print anything. It has already been taken care of. Just implement the given function.
Constraints:
0 <= N <= 10^6

Where 'N' is the length of the input string.

Time Limit: 1 sec
Sample Input 1:
aaabbccdsa
Sample Output 1:
a3b2c2dsa
Explanation for Sample Output 1:
In the given string 'a' is repeated 3 times, 'b' is repeated 2 times, 'c' is repeated 2 times and 'd', 's' and 'a' and occuring 1 time hence no compression for last 3 characters.
Sample Input 2:
aaabbcddeeeee
Sample Output 2:
a3b2cd2e5
Explanation for Sample Output 2:
In the given string 'a' is repeated 3 times, 'b' is repeated 2 times, 'c' is occuring single time, 'd' is repeating 2 times and 'e' is repeating 5times.
*/
public class Solution
{
    public static String getCompressedString(String str) {
        // Write your code here.
        String words = "";
        if(str.length() == 0)
        {
            return "";
        }
        else
        {
            char check = str.charAt(0);
            int count = 0;

            for(int i = 0; i < str.length(); i++)
            {
                if(str.charAt(i) == check)
                {
                    count++;
                }
                else if(str.charAt(i) != check)
                {
                    if(count > 1)
                    {
                        words += Character.toString(check) + (count);
                    }
                    else
                        words += Character.toString(check);

                    check = str.charAt(i);
                    count = 1;
                }
            }
            if(count > 1)
            {
                words += Character.toString(check) + (count);
            }
            else
                words += Character.toString(check);
        }
        return words;
    }
}