StringBuffer.reverse();

public class MainClass {
  public static void main(String args[]) {
    StringBuffer sb1 = new StringBuffer("abcde");
    sb1.append("abcdefghij");
    StringBuffer sb2 = sb1.reverse();
    System.out.println(sb1);
    System.out.println(sb2);
  }
}

Why the fuck is jihgfedcbaedcba also being assigned to sb1?

>>8
I thought it was smart enough to walk all the way down to sb (or whichever the first actual object is) if the return type is void. Isn't it?