Lambda expression in java | Java Lambda expressions[Lambda expression example - Math Operation] ~ foundjava

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https://www.youtube.com/watch?v=fOhA0LsU9zc&list=UUhwKlOVR041tngjerWxVccw


LambdaDemo.java

@FunctionalInterface
interface MathOperation
{
    int operation(int a, int b);
}

public class LambdaDemo
{

    public static void main(String[] args)
    {

        LambdaDemo lambdaDemo = new LambdaDemo();

        // with type declaration
        MathOperation addition = (int a, int b) -> a + b;

        // with out type declaration
        MathOperation subtraction = (a, b) -> a - b;

        // with return statement along with curly braces
        MathOperation multiplication = (int a, int b) -> {
            return a * b;
        };

        // without return statement and without curly braces
        MathOperation division = (int a, int b) -> a / b;

        System.out.println("10 + 5 = " + lambdaDemo.operate(10, 5, addition));

        System.out.println("10 - 5 = " + lambdaDemo.operate(10, 5, subtraction));
        
        System.out.println("10 x 5 = " + lambdaDemo.operate(10, 5, multiplication));
        
        System.out.println("10 / 5 = " + lambdaDemo.operate(10, 5, division));
    }

    private int operate(int a, int b, MathOperation mathOperation)
    {
        return mathOperation.operation(a, b);
    }

}

Output

10 + 5 = 15
10 - 5 = 5
10 x 5 = 50
10 / 5 = 2

Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/LambdaDemo_math_App.zip?attredirects=0&d=1