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Java 8

Java 8 introduces in 18th march 2014, It comes for concise the code with the help of functional programming. the new features in java 8 are:-

Lambda expressions:-

We can use functional programming with the help of Lambda expressions it is very easy to use.
It implements a specific interface called functional interface.
Lambda expressions is a function that does not have any name,return type and modifer or it is a nameless function so we called Lambda expressions is an Anonymous function.
A function that can be created without belonging to any class.

Syntax of lambda expression-





(parameters) -> function body;

Code Without Lambda Expression to print Hello world





public class Test
{
  public static void main(String args[])
  {
    System.out.println("Hello World..");
  }
}

Code With Lambda Expression to print Hello world





import java.util.function.*;
interface HelloWorldLambdaExpression
{
  void print();
}
public class HelloWorld 
{
  public static void main(String[] args) 
  {
    HelloWorldLambdaExpression obj=()->{System.out.println("Hello World...");}; // lambda expression to define the calculate method 
    obj.print();  // parameter passed and return type must be same 
  }
}

Code Without Lambda Expression to print Addition value





public class Test
{
  public static void main(String args[])
  {
    int a=10,b=20;
    System.out.println(a+b);
  }
}

Code Witht Lambda Expression to print Addition value





import java.util.function.*;
interface Sum
{
  int sumCalculation(int a, int b);
}

public class ExampleOfFunctionalInterfaceAnnotation 
{
  public static void main(String[] args) 
  {
    int m=10; int n=20;
    Sum sum=(int a, int b)->a+b; // lambda expression to define the calculate method
    int result=sum.sumCalculation(m, n);  // parameter passed and return type must be same
    System.out.println("Result: "+result); 
  }
}

JAVA 8

Java 8

Lambda expressions:-

Syntax of lambda expression-

Code Without Lambda Expression to print Hello world

Code With Lambda Expression to print Hello world

Code Without Lambda Expression to print Addition value

Code Witht Lambda Expression to print Addition value

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