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- 单项选择题 1. class A { 2. public String toString () { 3. return “4”; 4. } 5. } 6. class B extends A { 7. public String toString () { 8. return super.toString() + “3”; 9. } 10. } 11. public class Test { 12. public static void main(String[]args) { 13. System.out.printIn(new B()); 14. } 15. } What is the result?()
A、 Compilation succeeds and 4 is printed.
B、 Compilation succeeds and 43 is printed.
C、 An error on line 9 causes compilation to fail.
D、 An error on line 14 causes compilation to fail.
E、 Compilation succeeds but an exception is thrown at line 9.
- B
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