Create a string with n characters

Question

Is there a way in java to create a string with a specified number of a specified character? In my case, I would need to create a string with 10 spaces. My current code is:

Answer 1

Just replace your StringBuffer with a StringBuilder. Hard to beat that.

If your length is a big number, you might implement some more efficient (but more clumsy) self-appendding, duplicating the length in each iteration:

 public static String dummyString(char c, int len) {
  if( len < 1 ) return "";
  StringBuilder sb = new StringBuilder(len).append(c);
  int remnant = len - sb.length();
  while(remnant  > 0) {
   if( remnant  >= sb.length() ) sb.append(sb);
   else sb.append(sb.subSequence(0, remnant));
   remnant  = len - sb.length();
  }
  return sb.toString();
 }

Also, you might try the Arrays.fill() aproach (FrustratedWithFormsDesigner's answer).