Check see if string passed in param matches with substring in the data str

Question

     // method that check to see if the string passed as the param appears as a
     // substring in the data string
     public boolean lookSubstring(String _data)
          for(int i = 0; i < _data.length(); i++)
               if(_data.equals(dataString.substring(0, _data.length())))
                    return true;     
          return false;
     }I still can't get it right... everything i type in is false...

Answer 1

    /** Returns true iff _data is a substring of the data string. */
public boolean lookSubstring(String _data)
    return dataString.indexOf(_data) != -1;
}indexOf() actually returns the index at which _data appears as a
substring. But, since it returns -1 if _data cannot be found, we can use
it to check.