What is the result(final class reference)? : Questions « Utility Classes « SCJP

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public class MainClass {
  int x = 5;

  public static void main(String[] args) {
    final MainClass f1 = new MainClass();
    MainClass f2 = new MainClass();
    MainClass f3 = MainClassSwitch(f1, f2);
    System.out.println((f1 == f3) + " " + (f1.x == f3.x));
  }

  static MainClass MainClassSwitch(MainClass x, MainClass y) {
    final MainClass z = x;
    z.x = 6;
    return z;
  }
}