JAVA EE: Java Tutorial: Lambda expression in java | Java Lambda expressions[Lambda expressions introduction]

Wednesday, 17 May 2017

Java Tutorial: Lambda expression in java | Java Lambda expressions[Lambda expressions introduction]

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Java Tutorial: Lambda expression in java | Java Lambda expressions[Lambda expressions introduction]

Dog.java

@FunctionalInterface //It is optional
public interface Dog
{
    public void eat();
}

NoLambdaDemo.java

public class NoLambdaDemo
{

    public static void main(String[] args)
    {

        /*
         * Without lambda, Dog implementation using anonymous class
         */
        Dog dog = new Dog()
        {
            @Override
            public void eat()
            {
                System.out.println("eating chicken");
            }
        };
        dog.eat();
    }

}

Output

eating chicken

LambdaDemo.java

public class LambdaDemo
{

    public static void main(String[] args)
    {

        /*
         * With lambda
         */
        Dog dog = () ->
        {
            System.out.println("eating chicken");
        };

        dog.eat();

    }

}