Count and Say problem.java

public class Solution {
    public String countAndSay(int n) {
        // Start typing your Java solution below
        // DO NOT write main() function
       String result="1";
       while(n>1)
       {
           int length=result.length(); 
           StringBuffer sb=new StringBuffer(); 
           int count=1; 
           for(int i=1; i<length; i++)
           {
               if(result.charAt(i)==result.charAt(i-1)) count++; 
               else {
                   sb.append(Integer.toString(count)); sb.append(result.charAt(i-1)); count=1; 
               }
           }
           sb.append(Integer.toString(count)); sb.append(result.charAt(length-1));
           n--; 
           result=sb.toString();
       }
       return result; 
    }
}