- release March 14

Features:

1. forEach() method

- Iterable interface

2. default & static methods in interface

default method:

- allow interface to have methods with implementation without affecting the classes

that implement the interface

- Default methods are also known as Defender methods or virtual extension methods

- provide backward compatibility so existing interfaces can use without implementing the

default methods in the class

static method:

- can not be overridden

3. Functional Interface & Lambda Expressions

- an interface with exactly one abstract method

- it is not mandatory to use annotation but we can use functional interface to avoid

addition of extra abstract methods

- benefit of java 8 functional interfaces is that we can use lambda expressions

- used to refer method of functional interface

4. Method Reference

- prerequisites are functional interface & lambda exp

- we can replace lambda exp with method ref

- used to refer method of functional interface

Types of Method References

1. Reference to a static method

2. Reference to an instance method

3. Reference to a constructor

5. Optional

- it's a final class

- to deal with NullPointerException

- to avoid abnormal termination of application

- java.util package

6. Stream API

- from java.util.stream package

- it does not store elements

7. Java Time API

8. Collection API improvement

9. Concurrency API improvement

8. I/O improvement

Base64

- java.util

Interfaces:

1. Consumer

- represents a function which accepts in one arguments and returns no result

- functional interface

2. BiConsumer

- represents a function which accepts in two arguments and returns no result

3. Function

- Represents a function that accepts one argument and produces a result

- java.util.Objects

Homework:

1.

interface I1{

default void display(){

// lines of code

}

}

interface I2{

default void display(){

// lines of code

}

}

class TestInterface implements I1,I2{

main(){

//lines of code

}

}

Addition of two nos using java 8

class Employee{

name,

id,

salary

}