1 class Str {
 2     public String strBuilderRepro() {
 3         return new StringBuilder(10).toString();
 4     }
 5 
 6     public static void main(String[] args)  {
 7         Str s = new Str();
 8         String foo = "";
 9         for (int i = 0; i < 20000; ++i) {
10             foo = s.strBuilderRepro();
11         }
12         System.out.println(foo);
13     }
14 }