Pattern generating algorithm. eg: abcd -> A-Bb-Ccc-Dddd

stammeringPattern.java

public class Accumul {
    public static String accum(String s){
        StringBuilder stBuild = new StringBuilder();
        for(int i = 0; i < s.length(); i++){
            for(int j = 0; j <= i; j++) {
                if (j==0){
                    stBuild.append(s.toUpperCase().charAt(i));
                }
                else {
                    stBuild.append(s.toLowerCase().charAt(i));
                }
            }
            stBuild.append('-');
        }
        stBuild.delete(stBuild.length()-1,stBuild.length());
        return stBuild.toString();
    }
}