Finding a substring in a string

public static boolean substr(String inputStr, String subStr){
  int length = inputStr.length();
  int index = 0;
  int check = 0;
  boolean found = false;
  StringBuffer newString = new StringBuffer();
  while (index < length) {
    try {
      if (inputStr.charAt(index) == subStr.charAt(check)) {
        newString.append(inputStr.charAt(index));
        check++;
        if (newString.toString().equals(subStr)) {
          found = true;
          break;
        }
      }
    } catch (Exception ex){}
    index++;
  }
  return found;
}

Update: The code is also available in Python in this entry