What & Why do we need Lambda Expressions in Java? | Tech Primers 

haha, true. I was discouraged by many people VPs, CTO while reviewing code and keep asking me to get rid of my stream apis and use simple for loop. I still use streams when required.

It is hard at first, specially if you are used to work with imperative progamming

yes vivek. just got carried away with the cricket players. :)

Drop me a mail to techprimerschannel@gmail.com I will send the invite

Nope. NOt necessarily.

You can just wrap it up into a function and use it

Functional interfaces can have only 1 method. This is to leverage the lambda usage. If there are 2 or more you can use it normally like you would before

Tech Primers thank you for quick response Yes one abstract method And non abstract can be any number of can be considered

+Wajahat Siddiqui just wanted to print it. Anyways foreach will be hit only once

Hmm.. Explanation is bit confusing

+naga g thanks naga. Glad that was useful

+Tech Primers

I have been using IntelliJ for the past 6 years and never turned back

@@TechPrimers IntelliJ is a commercial/paid IDE unless it is the Community Edition which removes some features. Eclipse is free, fully functional and extensible (Yes IntelliJ too but Eclipse was around so long and is so popular that it has a ton of extensions).

you'll get a compilation error

Lambda expression can be used for interfaces which have only one method.

He didn't write Game football =new Game(); but this, Game football =new Game(){ public void play(){ sop("something") } }); This is how we define an anonymous inner class. It simply means that whatever you write inside new Game(){ you are creating a class which implements Game interface and you are overriding play method and giving implementation details. You may want to look into anonymous inner classes in detail since they are the basis of lambdas.

@@tominpmarkose very good explanation... thankyou

you're not creating an instance of the interface. Rather, the code defines an anonymous class that implements the interface, and instantiates that class.

stackoverflow.com/questions/9157784/java-interface-with-new-keyword-how-is-that-possible

@@neshant89 I had the same question, thanks for clarifying.