Part 1
Interview questions on Java 8 Static Method for experienced covered in this post:
What are the static methods in functional interface?
-
Static method declared inside the interface is called the static
method.
-
We can have the implementation of static class inside the interface.
-
Static methods can invoke with the Interface name. No need to instantiate
the class.
What is the purpose of static methods in functional interface?
-
Just to define utility methods in the interface then we can go for static
methods.
-
The main purpose of the static method is, we can invoke static methods
like the utility class method. No need to create an instance of that
class.
 
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How will you invoke static methods from class?
-
We can invoke the static method using the interface name. No need to
create an instance of the class.
- Please refer to the below example.
|
package simplifiedjava.crackedInterview.java8; public interface InterfaceForStaticMethod {
public
static
void
m1() {
System.out.println("m1() method called.");
} } package simplifiedjava.crackedInterview.java8; public class StaticMethodDemo {
public
static
void
main(String[] args) {
InterfaceForStaticMethod.m1();
}
}
Output:
m1() method called. |
Can you declare public static void main() method inside functional interface?
-
Yes, we can declare the main() method inside the functional interface and
invoke the main() method from class with the interface name.
-
But, It will be treated as a normal method.
-
JVM always invoked the main method of a class not declared in the
interface.
-
Please refer to the below example.
|
package simplifiedjava.crackedInterview.java8; public interface InterfaceForStaticMethod {
public
static
void
m1() {
System.out.println("m1() method called."); }
public
static
void
main(String[] args) {
System.out.println("Main method called.");
} } package simplifiedjava.crackedInterview.java8; public class StaticMethodDemo {
public
static
void
main(String[] args) {
InterfaceForStaticMethod.m1();
InterfaceForStaticMethod.main(args);
}
}
Output:
m1() method called. Main method called. |
- Java interview questions and answers all MNC - Click here
-
Basic core java interview questions and answers for freshers - Click here
-
Core java interview questions for 3 years experience - Click here
-
Core java interview questions and answers for 3-5 years exp - Click here
-
Core java interview questions and Answers for 5 - 7 Years exp - Click here
-
Basic Java Interview Questions and Answers - Click here
-
Java interview questions and answers on oops - Click here
-
Java interview questions and answers on Strings - Click here
-
Java interview questions on exception handling - Click here
-
Interview questions on multithreading in java for experienced - Click here
-
Interview questions on serialization in java for experienced
- Click here
-
Interview questions on inner class in java for experienced
- Click here
-
Interview questions on Collections in java for experienced
- Click here
|
Thank you techies for visiting this blog. I hope you enjoyed this blog and got more technical knowledge. I have tried to cover all types of questions and provided examples tested on eclipse as much as I can. Guys, please don’t just mug up the questions and answers. Try to clear your concepts with examples. Try to write a code on eclipse once you read the concepts. It will help you to memorize the concepts for a very long time. Simultaneously you will be prepared for interview programs as well. It will help you to survive in the IT sector for a long time. It may be easy to crack an interview but it's really tough to survive in the IT industry with inadequate knowledge and skills. I have collected all the questions from actual interviews attended by my friends, colleagues, college mate and classmate. I have covered frequently asked questions as well as challenging questions. I have included many programs to understand the concept thoroughly. I will try to explain the concept with the help of a real-time program in eclipse. You can share more questions which are not covered in this blog or post. Always welcome your suggestions and queries. I will definitely try to resolve it. Please comment your queries and new set of questions under the comment sections. I will create a new post for those questions.
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