package Java8;

import java.util.ArrayList;

import java.util.Collections;

import java.util.Comparator;

import java.util.List;

@FunctionalInterface

interface MyFunctionalInterface {

public int addMethod(int a, int b);

}

public class Java8FunctionalInterfaceExample {

public static void main(String args[]) {

List<String> names1 = new ArrayList<>();

names1.add("Dilip ");

names1.add("Diwas ");

names1.add("Abhir ");

names1.add("Rahul ");

names1.add("Kabir ");

List<String> names2 = new ArrayList<>();

names2.add("Dilip ");

names2.add("Diwas ");

names2.add("Abhir ");

names2.add("Rahul ");

names2.add("kabir ");

List<String> names3 = new ArrayList<>();

names3.add("Dilip ");

names3.add("Diwas ");

names3.add("Abhir ");

names3.add("Rahul ");

names3.add("kabir ");

//sorting using java7

Collections.sort(names1, new Comparator<String>() {

@Override

public int compare(String s1, String s2) {

return s1.compareTo(s2);

}

});

System.out.println(names1);

//sorting using java 8 using member reference

Collections.sort(names2, String::compareTo);

System.out.println(names1);

//sorting using java 8 using Lambda Expression

Collections.sort(names3, (s1, s2) -> s1.compareTo(s2));

System.out.println(names3);

// Using Labda Expression via own functional interface

MyFunctionalInterface sum = (a, b) -> a + b;

System.out.println("Result: " +sum.addMethod(12, 188));

}

}