Java full stack and manual testing and automation testing 

Object Orientation - Explore the inside of an object, however, make sure to protect it from the garbage collector thread.

Data types - Make storage of data more efficient, learn the wiz art of typecasting.

Control Constructs - Believer in smart work instead of hard work? Control Constructs are a MUST in your logic armory.

Arrays - Use a SINGLE variable name to access tonnes of data. But wait, there are some limitations!

Strings - Who doesn’t wish to play strings? But not everyone knows how to! Watch String, StringBuffer and StringBuilder fight for significance.

Methods - Methods live for the team. Fundamentals of almost every modern programming language, methods are born on the stack, execute and diminish.

Method Overloading - Multiple methods with the same name - sounds polymorphism but is it?

Encapsulation - Well project also need some security. Learn how to create bodyguards to secure the java project.

Constructors- Protect your private data using public getters and setters. Don’t like the name setters? How about Constructors? Interested in constructor chaining and local chaining, constructor overloading?

Static Keyword - Awesome concept for utilization of memory efficiently.

Inheritance - Acquire the properties and behavior of the parents, but, for what? Save time using inheritance, code less and earn more.

Method Overriding - If a subclass has the same method as declared in the parent class, it is known as method overriding in Java.

Final Keyword - Want to stop inheritance, want to create constant, how about stopping overriding? Make a method final in the abstract class and check!

Polymorphism - 1 to many! Use polymorphism concepts to not only reduce the length of your code and make it compact but also make it super flexible

Abstraction - Want to display only essential details to user? You are in correct concept.

Interfaces - There must be something special about these interfaces that along with class names and constructors, they are also allowed Upper case initials. Are they of equal significance as a class?

Packages - Who all should know the location of the locker? Who should have the keys? Specify access by practicing the concept of packages. Do we have a standard format for creating a package? How many inbuilt packages do you know and why is the package kept so?

Exception Handling - We are mere programmers and bugs are bound to occur even after utmost sincerity. Handle exceptions as prevention is better than cure.

Multithreading - Speed is essential in today’s world. Give your application an extra wheel by using the concepts of multi-threading.

Collections - Warned you about the limitations of arrays, didn’t we? Well, why fear when collections are here. Make storage, retrieval as well as searching efficient by using the gifts of the Collections framework.

Generics - Make your life more easier by using generics.

Networking - Learn how to make communication happen between two processes via socket programming.

Serialization and Deserialization - Interested in making the object’s state persistent? well, learn how?

Input/output in java - Learn to provide input and get outputs to a java program.

Latest Release new additions in jdk - Always updating ourself is the best thing, well make yourself ready to get updated with the latest updates of jdk.

JDBC - Make the communication between your java code and database possible by using the concepts of JDBC.

Servlets - Look and feel of a web app is all-important but this is how and where you write the business logic. The BACK END- Servlets.

JSP - Learn this amazing server page technology JSP and ensure the user wants to visit your web app again and again.

Hibernate - Facing difficulty in learning SQL or fed up with writing repetitive JDBC code? Then learn hibernate.

Spring and Spring Boot - Learn this to solve difficulties in Enterprise application development.

APIs - Ever wondered, how two software’s or computers communicate? Make your life easy with Rest API and Web API.