试题详情
单项选择题 1. class SuperClass {  2. public a geta() {  3. return new a();  4. }  5. }  6. class SubClass extends SuperClass {  7. public b geta() {  8. return new b();  9. }  10. }  Which is true?() 

A、 Compilation will succeed if a extends b.

B、 Compilation will succeed if b extends a.

C、 Compilation will always fail because of an error in line 7.

D、 Compilation will always fail because of an error in line 8.

  • B
  • 关注下方微信公众号,在线模考后查看

热门试题