Java Lambda Expressions 1 - Understanding Lambda Expression in Java with an Example

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What is Lambda Expression in Java?

A lambda expression implements a functional interface. 

Another way to look at it is, a lambda expression is an anonymous method that you can pass to other methods.

In Functional Programming - the idea is that we can treat code/function just like data and that we can pass a piece of code or function to another method. This is the main concept of functional programming. Lambda expressions help you to adopt the functional programming style in Java.

00:00 What is Lambda Expressions in Java
02:23 Understanding Lambda Expression in Java with an Example

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Комментарии
Автор

Very detailed explanation. I ended up watching all the videos in this course. Thanks for this free course.

fullstack
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Thanks for amazing explanation, If you dont mind could you please share the sources code for the examples? thanks in advance

mel
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Is helpful to zoom in the expression of lambda code

edwinarias
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Very good explanation. Maybe you can help me out with my Lambda. It's like this.

private String[] getFolderNames(String basePath) {
URL resource =
File file = new File(resource.getFile());
return file.list((current, name) -> new File(current, name).isDirectory());
}

I get null pointer not for file, but for the return. Any solutions?

TerminallyUnique