下面代码执行后,正确的输出结果包括( )
public class FinalFinallyFinalize {

final StringBuilder sb = new StringBuilder("init");

public static void main(String[] args) {

FinalFinallyFinalize fff = new FinalFinallyFinalize();

System.out.println(fff.sb.toString());
fff.sb.append(" changed");

System.out.println(fff.sb.toString());}}