What is the output for the below code?
interface A{
public void printValue();
}
public class Test{
public static void main (String[] args){
A a1 = new A(){
public void printValue(){
System.out.println("A");
}
};
a1.printValue();
}
}
interface A{
public void printValue();
}
public class Test{
public static void main (String[] args){
A a1 = new A(){
public void printValue(){
System.out.println("A");
}
};
a1.printValue();
}
}A. Compilation fails due to an error on line 3
B. A
C. Compilation fails due to an error on line 8
D. null
E. None of these
Answer: Option B
Solution(By Examveda Team)
The A a1 reference variable refers not to an instance of interface A, but to an instance of an anonymous (unnamed) class. So there is no compilation error.
This Question Belongs to Java Program >> Interfaces And Abstract Classes
A. A contract specifying a set of methods that a class must implement
B. A class that cannot be instantiated
C. A class that contains only static methods
D. A subclass of the Object class
In Java, can a class implement multiple interfaces?
A. Interfaces cannot be implemented by classes
B. Only abstract classes can implement interfaces
C. No, a class can only implement one interface
D. Yes, a class can implement multiple interfaces
What is the purpose of an abstract class in Java?
A. To declare abstract methods
B. To provide a base class with common methods and fields
C. To make a class final
D. To declare abstract methods
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