core-java-concepts/lambda-expression-examples/src/Main.java at main · basecs101/core-java-concepts · GitHub

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import java.util.ArrayList;

import java.util.List;

/**

* Functional Interface

interface FuncInterfaceExample {

int display(int a);

}

/**

* Class implementing functional interface

//class TestClass implements Test {

// @Override

// public int display(int a) {

// return a*a;

// }

//} //similar overridden method written as lambda expression

/**

* Driver class for above functional interface

public class Main {

public static void main(String[] args) {

//FuncInterfaceExample test = a -> a*a;

//Lambda expression can be used for providing

//method implementation for functional interface.

FuncInterfaceExample funcInterfaceExample = a -> {

System.out.println("Inside Display method");

return a*a;

};//this is implementations of display method.

int result = funcInterfaceExample.display(10);

System.out.println("Result from display method : "+result);

//Another example for lambda expression

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

guestList.add("Vikram");

guestList.add("Vivek");

guestList.add("Sam");

//Print all elements of guestList using for loop

for (String guestName : guestList){

System.out.println(guestName);

}

//Print all elements of guestList using forEach loop and Lambda exp

guestList.forEach(guestName -> System.out.println(guestName));

}

core-java-concepts/lambda-expression-examples/src/Main.java at main · basecs101/core-java-concepts · GitHub

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