Java compressing Strings

Question

I need to create a method that receives a String and also returns a String.

Ex input: AAABBBBCC

Ex output: 3A4B2C

Well, this is quite embarrassing a

Answer 1

The easiest approach:- Time Complexity - O(n)

public static void main(String[] args) {
    String str = "AAABBBBCC";       //input String
    int length = str.length();      //length of a String

    //Created an object of a StringBuilder class        
    StringBuilder sb = new StringBuilder(); 

    int count=1;   //counter for counting number of occurances

    for(int i=0; i