StringCompression.java

public class StringCompression {
	
	public String compression(String s1){
		
		StringBuffer sb = new StringBuffer();
		int count =1;
		char prev = s1.charAt(0);
		for(int i=1;i<s1.length();i++){
			char curr =s1.charAt(i); 
			if(prev==curr){
				count++;
			}else{
				sb.append(prev);
				sb.append(count);
				prev = curr;
				count=1;
			}
		}
		sb.append(prev);
		sb.append(count);
		if(s1.length()<sb.length()){
			return s1;
		}else{
			return sb.toString();
		}
	}
	public static void main(String args[]){
		String s1 = "ssssuuuummmmmmiiiittttttttttttt";
		StringCompression sc = new StringCompression();
		System.out.println("Compression of " + s1 + " is : " +sc.compression(s1));
		s1 = "Jaain";
		System.out.println("Compression of " + s1 + " is : " +sc.compression(s1));
	}
}