Java 8 New Features Tutorials - 08 : Method reference | Static Method Reference | Part - 1 смотреть онлайн

In this video we are discussing about Method Reference .
Types of Method References :
Static Method Reference
Non Static Method Refrence
Bound Reciever
Unbound Reciever
Constructor Reference
This Refrence
Super Reference

Functional Interface : https://youtu.be/UEKtVuT3zVU

Lambda Expression Part -1 : https://youtu.be/G-E1ckPfFgw

Lambda Expression Part -2 : https://youtu.be/4mhig3H-Z2o

Lambda as Method parameter : https://youtu.be/qoLfEoWNsm0



Passing Lambda function as Method parameter :

static predicateCheck(int a, MyPredicate ref){
ref.test(a);
}
Case- 1 :
MyPredicate pred =(a)-a%2==0;
predicateCheck(10, pred);
Case- 2 :
predicateCheck(10, (a)-a%2==0);

Problem Statement :
we have a list of interger and wanted to perform some operations
1 - Sum of all numbers
2 - Sum of all Even Numbers
3 - Sum of all Odd Numbers


Lambda Expression is enabling Functional Programming in java 8.
Through Lambda Expression we can pass block of code as parameter of a method.
Lambda Expression is also known as Method Anonymous implementation.
Lambda Supports Higher Order Function implementation and Lazy Evaluation methods.

Lambda Expression :
- Block of code which take some inputs and return output.
- Enabling Functional Programming.
- Anonymous Method implementation.

Pre-Condition :
can work on FunctionalInterface only

Pro :
More readable code
Store block of code in a variable
we can pass an implentation as an argument of a method

Cons : in some cases we dont get methods in IDE

==========================================================
Lambda Expression Syntax :: (args)-{stmnt};
==========================================================

Lambda Expression works with Functional Interface only .

Case -1 :a) No Method Argument with no return type (void method_name();)
b) No Method Argument with return type (R method_name();)

Case -2 :a) One Method Argument with no return type (void method_name(T t);)
b) One Method Argument with return type (R method_name(T t);)

Case -3 :a) More Than One Arguments with no return type (void method_name(args...);)
b) More Than One Arguments with return type (R method_name(arg..);)


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