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Given:
10. interface A { void x(); }
11. class B implements A { public void x() { } public
voidy() { } }
12. class C extends B { public void x() {} }
And:
20. java.util.List list = new java.util.ArrayList();
21. list.add(new B());
22. list.add(new C());
23. for (A a:list) {
24. a.x();
25. a.y();;
26. }
What is the result?
1 Compilation fails because of an error in
line 25.
2 The code runs with no output.
3 An exception is thrown at runtime.
4 Compilation fails because of an error in
line 20.
- 3 Answers
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Answers were Sorted based on User's Feedback
Answer / neil
Compilation fails because of an error in
line 25.
| Is This Answer Correct ? | 44 Yes | 2 No |
Answer / pankaj malik
Compilation Error will be thrown at line 23 :
Type Mismatch: cannot convert from elemnt type Object to A.
| Is This Answer Correct ? | 9 Yes | 0 No |
Answer / r.jainrocks@gmail.com
Compilation fails because of an error in
line 25.
because interface A has no method definition for method y()
....
| Is This Answer Correct ? | 9 Yes | 4 No |
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This is my code i have a doubt class ab implements a,b { public void add() { System.out.println("Hi") } } interface a { public void add(); } interface b { public void add(); } in this code i have two interface implemented in the class has same method.just i want to know which method of interface implemented in the class. interface a or interface b? confused me .
Core Java 
