单项选择题
20. public float getSalary(Employee e) {
21. assert validEmployee(e);
22. float sal = lookupSalary(e);
23. assert (sal>0);
24. return sal;
25. }
26. private int getAge(Employee e) {
27. assert validEmployee(e);
28. int age = lookupAge(e);
29. assert (age>0);
30. return age;
31. }
Which line is a violation of appropriate use of the assertion mechanism?()
A. line 21
B. line 23
C. line 27
D. line 29
相关考题
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单项选择题
1. class Exc0 extends Exception { } 2. class Exc1 extends Exc0 { } 3. public class Test { 4. public static void main(String args[]) { 5. try { 6. throw new Exc1(); 7. } catch (Exc0 e0) { 8. System.out.println(“Ex0 caught”); 9. } catch (Exception e) { 10. System.out.println(“exception caught”); 11. } 12. } 13. } What is the result?()
A. Ex0 caught
B. exception caught
C. Compilation fails because of an error at line 2.
D. Compilation fails because of an error at line 6. -
单项选择题
Youwantsubclassesinanypackagetohaveaccesstomembersofasuperclass.Whichisthemostrestrictiveaccessthataccomplishesthisobjective?()
A. public
B. private
C. protected
D. transient
E. default access -
单项选择题
public class X { public static void main(String [] args) { try { badMethod(); System.out.print(“A”); } catch (Exception ex) { System.out.print(“C”); } finally { System.out.print(“B”); } System.out.print(“D”); } public static void badMethod() { throw new Error(); } } What is the result?()
A. ABCD
B. Compilation fails.
C. C is printed before exiting with an error message.
D. BC is printed before exiting with an error message.
E. BCD is printed before exiting with an error message.
