第40題 SCJP 6.0 認證教戰手冊 黃彬華著 碁峰出版 21 Given: 1. class Foo{ 2. private int x; 3. public Foo(int x){this.x = x;} 4. public void setX(int x){this.x = x;} 5. public int getX(){return x;} 6. } 7. 8. public class Gamma{ 9. static Foo fooBar(Foo foo){ 10. foo = new Foo(100); 11. return foo; 12. } 13. public static void main(String[] args){ 14. Foo foo = new Foo(300); 15. System.out.print(foo.getX() + "-"); 16. 17. Foo fooFoo = fooBar(foo); 18. System.out.print(foo.getX() + "-"); 19. System.out.print(fooFoo.getX() + "-"); 20. 21. foo = fooBar(fooFoo); 22. System.out.print(foo.getX() + "-"); 23. System.out.print(fooFoo.getX()); 24. } 25. } What is the output?
(A) 300-100-100-100-100
(B) 300-300-100-100-100
(C) 300-300-300-100-100
(D) 300-300-300-300-100