Learn Core Java with Free Lessons & Tips

Sample program:

class Sample {

        public static void main(String args[ ] ) {

             System.out.println("Sample") ;

          }

}

Program explanation:

Keyword used in line 1- class

The name of the class(Identifier) - Sample

Class enclosed in -  {  }

Program execution begins with- main() 

Access modifier-public

static-allows main() method to be called without having an instance of class. 

void-main() doesn't have a return value. 

main() - called when java application begins execution

String args[]- args is a parameter-array of instances of class String

args- receives command line arguments. 

System- predefined class

out - output stream connected to console

Println- displays strings passed to it. 

;  - semicolon ends the statement. 

Hi Mrinal,

There are multiple frameworks came and gone and new are also coming up.

BUt choosing a Java framework depends upon the stability of it in the market and ease of use to the developers.

The best combination is Spring with Hibernate- it is there since several years but very statble and easy to learn and use.

Java is still relevant and Most important Language in 2021 too.

Highly Fexible and platform Independent.

Currently Java is the preferred option for creating Android apps, desktop applications, e-commerce programming, and  web enterprise applications.

As per job market All novice web developers need to learn Java and JavaScript, which helps them polish their coding skills. 

Hey,

The best way to learn Core Java is to learn from Java itself.

Offically, java is owned by Oracle and oracle provides Java tutorials at  https://docs.oracle.com/javase/tutorial/

Other good option is w3schools.com for Java and many other programming languages!

Hi Iqbal,Here i am going share some sites from were you can learn programming and coding for free.

1) codecademy: Learn to Code - for Free | Codecademy

2) Tutorialspoint java online tutorial : Java Tutorial

3) Udemy : Free Java Tutorial - Free Java Tutorial - Learning Java for Complete Beginners

4) Educative: Learn Java from Scratch - Free Interactive Course

5) Javatpoint http://javatpoint.org

To know more about Java the language, read the tutorial at http://www.oracle.com

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