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.
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 |
What is the order of method invocation in an Applet?
If I will write String s=new String("XYZ"); String s1=new String("XYZ"); if(s.equals(s1)){ sop("True"); } else{ sop("False"); } This program will give me "True". But When I am creating my own class suppose class Employee{ public Employee(String name); } Employee e= new Employee("XYZ"); Employee e1 = neew Employee("XYZ"); if(e.equals(e1)){ sop("True"); } else{ sop("False"); } Then it will give the output as "False". Can I know what is happening internally?
What happens if we override private method?
what is difference between Exception and Error?
What is the synchronized method modifier?
What is defined as false sharing in the context of multithreading?
How to make a read-only class in java?
Explain method local inner classes ?
When is the finally clause of a try-catch-finally statement executed?
Print Vertical traversal of a Binary Tree.
What is the set interface in java programming?
What is lazy initialization in java?