Generics in Java

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In a nutshell, generics enable types (classes and interfaces) to be parameters when defining classes, interfaces and methods.
Much like the more familiar formal parameters used in method declarations, type parameters provide a way for you to re-use the same code with different inputs.
The difference is that the inputs to formal parameters are values, while the inputs to type parameters are types.

Code that uses generics has many benefits over non-generic code:
- Stronger type checks at compile time.
A Java compiler applies strong type checking to generic code and issues errors if the code violates type safety.
Fixing compile-time errors is easier than fixing runtime errors, which can be difficult to find.
- Elimination of casts.
- Enabling programmers to implement generic algorithms.
By using generics, programmers can implement generic algorithms that work on collections of different types, can be customized, and are type safe and easier to read.

In this video we will see :
- What is Generics
- What is Type-safe Language
- How to achieve type safety
- An example or program of Generics implementation in Java

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[arkojyotisen]

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[crankMiHoffer]

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[queenskeleton]

Best Java channel. Straightforward explanation, with code live demonstrated. You are sure to learn just by watching this. I learned from you in Spring Boot, REST services, and Java core APIs. Thank you so much!

[nasreenmohsin]

he explained it in very simple manner now i understand this concept hope he will upload more complex way to define generic

[anthonycarella]

Very straight-forward and easy to understand. Thanks for the content!

[willyang]

Thank you so much! I've been looking all over the internet for this and none of them were as good and straightforward as this! Thank You SO MUCH!

[MsElsospechoso]

This guy is awesome, he really likes teaching which is highly appreciate it.

[aishwaryadash]

This is the single most important video if you want to be clear about Generics...Thank you!!

[gajeshtripathi]

I was always confused with "? extends ..." & "? super ...." but now it is clear to me. Thanks Navin Sir.

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The beauty of java is that before solving clients problem you have to solve java problems.

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[farhaankazi]

in method definition of public void demo(ArrayList<? extends T> obj), you have use wildcard upper bound of T but actually It does not require because T itself is bound with Number.

[nicksonmakama]

This really is the best video on Generics, I love it!

[anupamkumar]

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[divyeshkumarbalar]

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[Layarion]

Now this was a good video. You didn't cut it too short and leave out some of the nuances like others do. Now i'ma go lookup that ? thing and Super.

[Harry-St-john]

u have some enormous talent sir...plz continue this job..all the best

[zhongweimao]

Thank you so much Bro for your explanation. Your video resolved many of my confusion that even my lecturer was not able to solve coz she did not understand my confusion. Generics is much more clear now for me.

[aminesfahani]

The best explanation for Generics and Collection interface and Collections classes

[manwithaction]

Awesome bro... Best Video I ever saw for Generics... Thanx man.