Implement java 8 functional interface using lambda example program

• Functional interfaces introduces in java 8 .
• Functional interfaces will have single abstract method in it.
• Check here for full details on Java 8 functional interface with example.
• Functional interfaces will be implemented by java 8 Lamda expressions.
• Lets see an example program on how can we use functional interfaces or how can we implement functional interfaces using Lamda expression in java 8.
• Create one functional interface with one abstract method in it.
• Create a class and implement this abstract method using Lamda Expressions.

#1: Java example program to create functional interface.

#2: Java example program to implement functional interface using Lamda expressions in java 8.

2. package com.instanceofjava.java8;
3. /**
4.  * @author www.Instanceofjava.com
5.  * @category interview programming questions
6.  * 
7.  * Description: java 8 Lamda expressions
8.  *
9.  */
10. public class LamdaExpressions {
11. 
    
12. public static void main(String[] args) {
14. FunctionalInterfaceExample obj = ()->{
15. System.out.println("hello world");
16. };
17. 
    
18. obj.show();
19. }
20. 
    
21. }

Output:

2. hello world