Java String Manipulation : Comparing adjacent Characters in Java

Question

i have the following problem
Given a string, return a \"cleaned\" string where adjacent chars that are the same have been reduced to a single char. So \"yyzzza\"

Answer 1

Looks like you are solving codingbat problems, it is good,

I m a beginner too. This exercise is supposed to be just using recursion

This is my solution:

public String stringClean(String str) {
  if (str.length() <= 1)
      return str;

  String adj1 = str.substring(0,1);
  String adj2 = str.substring(1,2);

  String rest = str.substring(1);

  if (adj1.equals(adj2)) {
      return stringClean(rest);
  } else
      return adj1 + stringClean(rest);
}

Hope it helps