Can we declare a method inside another method..??means nested methods..

Question

I saw 👀 Java version 7 and below were not allowed to do nested methods then how can we achieve this...

class MyClass
{
public static void main(String[] args)
{
public static void display()
{
// something like this...
}
}

IS IT CORRECT...🧐

Answer 1

♡Nani《 King Of Pain 》♡
Yes you can but not "directly"

https://www.xspdf.com/resolution/10302515.html

Answer 2

Java does not support “directly” nested methods. Many functional programming languages support method within method. But you can achieve nested method functionality in Java 7 or older version by define local classes, class within method so this does compile. And in java 8 and newer version you achieve it by lambda expression.

Answer 3

public class Test {

    static void Foo()

    {

        // local class

        class Local {

            void print()

            {

                System.out.println("works!");

            }

        }

        new Local().print();

    }

    public static void main(String[] args)

    {

        Foo();

    }

}
https://code.sololearn.com/cebZYP3KZ1dw/?ref=app
This would be a possible way or in lambda
public class Test {

    interface myInterface {

        void run();

    }

    // run() using Lambda expression

    static void Foo()

    {

        // Lambda expression

        myInterface r = () ->

        {

            System.out.println("works");

        };

        r.run();

    }

    public static void main(String[] args)

    {

        Foo();

    }

}

Answer 4

Piyush Thank you 😊

Answer 5

Julian Bents thanks 🙏 for help

Answer 6

Runnable method = () -> System.out.println("method");
method.run();

Answer 7

Yes you can