Use StringBuilder to pad String with blank spaces or other characters

Question

I\'m a beginner to java and this is my first post on Stackoverflow. Although my initial code is similar to other posts here, my question relates to implementing StringBuilde

Answer 1

How about simplifying this?

• padnum is the maximal length of your String
• result.length is the length already used

• so you can calculate how many placeholders you need align the string right by substracting the alligned string from the overall size.

  StringBuilder sb = new StringBuilder();
  int rest = padnum - result.length();
  for(int i = 1; i < rest; i++)
      {
           sb.append(" ");
      }
  sb.append(result);
  return sb.toString();
  

This calculates how many spaces have to be added and adds them. (with a StringBuilder, this is relatively fast) at the end it adds your result.