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A Complete Guide to Advanced Java Programming

Introduction

In today's technology-driven world, learning a programming language can be a game-changer for your career. And in programming languages, Java is one of the most popular and influential languages in the software development landscape. Whether you're a professional or just starting your career path, understanding Java and its benefits can open up many opportunities.

Java has earned its reputation for good reason. It is a versatile, powerful, widely adopted programming language with a vast ecosystem. In this blog, we will explore online java certification from core Java and advanced java programming features and why learning Java can immensely benefit your career, regardless of the industry or domain you're interested in.

Java Programming Language

Java is a high-level, general-purpose programming language developed by Sun Microsystems (now owned by Oracle Corporation) in the mid-1990s. It was designed to be platform-independent, meaning that Java programs can run on any device or operating system with a Java Virtual Machine (JVM) installed. As a result, Java has gained immense popularity and is widely used in various domains, including web and mobile application development, enterprise software, scientific computing, and more. According to Statista, Java is currently the fifth most used programming language globally. That says a lot.

Java Programming Language

What Are The Key Features of Java

Java programming language offers some unique features that are important in the programming world. Let’s look at some of these key features and how they can affect your programming needs: Key Features of Java

  1. Simple and Easy to Learn: Java was designed to be beginner-friendly, with a syntax similar to the C++ programming language. It eliminates complex features like explicit memory management and operator overloading, making writing, reading, and maintaining code more accessible.
  2.  Object-Oriented Programming (OOP): Java is a fully object-oriented language that follows the principles of encapsulation, inheritance, polymorphism, and abstraction. It allows developers to structure their code into modular and reusable objects, promoting code organization and maintainability.
  3.  Platform Independence: Java's "write once, run anywhere" capability is a significant advantage. Java source code is compiled into bytecode, which can be executed on any device or operating system that has a JVM. This portability makes Java suitable for developing applications that can run on diverse platforms.
  4. Automatic Memory Management: Java features automatic memory management through garbage collection. Developers do not need to manually allocate and deallocate memory, as the JVM manages memory. This reduces the risk of memory leaks and makes Java programs more reliable and efficient.
  5. Strong Standard Library: Java has a vast and comprehensive standard library called the Java Development Kit (JDK). It provides classes and APIs for everyday programming tasks, such as string manipulation, file I/O, networking, and more. In addition, the standard library simplifies development and saves time by offering pre-built functionality.
  6. Multithreading and Concurrency Support: Java has built-in support for multithreading, allowing developers to create concurrent and parallel applications. The language provides mechanisms to handle multiple threads, synchronization, and inter-thread communication, enabling efficient utilization of system resources and improved application performance.
  7.  Robust Exception Handling: Java incorporates robust exception handling mechanisms. Developers can catch and handle exceptions, preventing program crashes and improving code reliability. Exception handling helps to identify and recover from errors, ensuring the smooth execution of Java programs.
  8. Security: Java has built-in features that protect against common vulnerabilities, making it a trusted choice for developing secure applications. The language includes bytecode verification, class loading restrictions, and a security manager to prevent unauthorized access and malicious activities.
  9. Rich Ecosystem and Community Support: Java benefits from a vast ecosystem of libraries, frameworks, and tools developed by the Java community. Popular frameworks like Spring, Hibernate, and JavaFX provide extensive capabilities for building enterprise applications, web services, and user interfaces. In addition, the active Java community offers support, documentation, and continuous improvements to the language.

Java's combination of simplicity, platform independence, robust standard library, and robustness has contributed to its widespread adoption and popularity among developers. These features make Java suitable for a wide range of applications and have established it as one of the most influential programming languages in the software development industry.

Parts of Java Programming Language

Java programming language provides interoperability, scalability, and adaptability. There are certain level of this programming language deepnding on the software it supports and develops. Mainly Java supports two level of programming level: Core and Advanced Java. Let’s learn about these levels of Java in details: 

1. Core Java:

Core Java refers to the basic features and functionalities of the Java programming language. It includes the fundamental concepts and libraries that form the foundation of Java development. Core Java focuses on the language syntax, object-oriented programming principles, and the core libraries provided by the Java Development Kit (JDK). It is the starting point for learning Java and building applications.

Benefits of Core Java:

Core Java is used in developing the web applcations and applets. This programming language provide the essential features including, data types, statements, and expression required in Java programming language. Core Java language provide certain benefits to the user and the developer simultaneously.  Here are some of the key benefits of using Core Java programming language: 

  1.  Platform Independence: Core Java programs can run on any platform that supports Java Virtual Machine (JVM), making them highly portable.
  2.  Object-Oriented Programming: Core Java follows the object-oriented programming (OOP) paradigm, enabling modular and reusable code development.
  3.  Robustness: Core Java provides built-in exception handling and memory management mechanisms, enhancing the robustness and reliability of applications.
  4. Rich API: Core Java offers a vast collection of APIs (Application Programming Interfaces) for tasks such as input/output, networking, database connectivity, and more.
  5. Wide Community Support: Java has a large and active community, which means extensive documentation, online resources, and support are readily available.

Core Java Features:

Core Java programming language is mostly used in client-side application as it offers variety of features and ease of accessibility to their users. Here are some key features of core java programming language: 

  1.  Simple Syntax: Core Java has a clean and easy-to-understand syntax, making it beginner-friendly.
  2.  Object Orientation: Core Java features supports the principles of encapsulation, inheritance, and polymorphism, enabling developers to write modular and reusable code.
  3. Multithreading: Java provides built-in support for concurrent programming with threads, allowing developers to create multithreaded applications.
  4.  Exception Handling: Core Java features offers a robust exception-handling mechanism that helps in detecting and handling runtime errors effectively.
  5. Garbage Collection: Java includes automatic memory management through garbage collection, relieving developers from manual memory deallocation.

2. Advanced Java:

To learn Advanced Java and  more advanced concepts and frameworks built on Core Java, it is important to know what is Advanced Java. It includes technologies and APIs that extend the capabilities of Core Java and facilitate the development of enterprise-level applications. Advanced Java programming covers web development, distributed computing, database connectivity, and more.

Benefits of Advanced Java:

Advanced Java programming language mainly expands on core java features such as, networking or multi-threading. It also works wel with teh graphical user interface(GUI) components such as buttons and windows. There are numerous benefits of incorporating Advanced java programming language in your next project: 

  1.  Web Development: Advanced Java programming language provides frameworks like Servlets, JavaServer Pages (JSP), and JavaServer Faces (JSF) that simplify web application development.
  2. Database Connectivity: Advanced Java offers APIs like Java Database Connectivity (JDBC) for seamless database interaction, enabling efficient data storage and retrieval.
  3.  Enterprise Application Development: Advanced Java supports technologies like Enterprise JavaBeans (EJB) and Java Message Service (JMS) for building scalable and robust enterprise applications.
  4.  Security: Advanced Java includes features for implementing secure authentication and authorization mechanisms, protecting sensitive data, and ensuring application security.
  5. Integration Capabilities: Advanced Java supports integration with other technologies and frameworks, enabling seamless communication between systems and components.

Advanced Java Features 

Advanced Java is a level ahead of Core Java, and it helps tackle the advanced concepts such as web technologies and datbase accessing. Here are some of the key benefits of using Advanced Java programming language:

  1. Web Application Development: Advanced Java features includes frameworks like Servlets, JSP, and JSF, providing tools for building dynamic and interactive web applications.
  2.  Enterprise Application Development: Advanced Java programming offers technologies like EJB, JMS, and Java Transaction API (JTA) to develop distributed and scalable enterprise applications.
  3. Persistence: Advanced Java provides frameworks like Java Persistence API (JPA) and Hibernate for object-relational mapping and database persistence.
  4.  XML Processing: Advanced Java includes APIs like Java API for XML Processing (JAXP) and Java Architecture for XML Binding (JAXB) for parsing and manipulating XML data.
  5. 5. Web Services: Advanced Java supports technologies such as Java API for XML Web Services (JAX-WS) and Java API for RESTful Web Services (JAX-RS) for developing web services and enabling interoperability between different systems.

Note: The specific Advance Java features and technologies in Advanced Java programming may vary depending on the version of Java and the frameworks used. If you learn Advanced Java you get to learn all the unprecedented aspects.

Difference Between Core Java and Advance Java

Core Java and Advance JavaThe distinction between Core Java and Advanced Java programming lies in their scope, complexity, and the concepts they cover. Here are the key differences:

Parameter 

Core Java 

Advance Java

Definition

Core Java serves as the foundation or basis for any advanced or elevated versions of Java. When someone learn Advanced Java it’s curriculum encompasses this as well. Without a solid grasp of the fundamental principles and basic concepts of Core Java, users will be unable to develop or comprehend any applications utilizing JAVA EE (Java Enterprise Edition). Java encompasses a comprehensive range of concepts, commencing from the fundamental principles of objects, classes, hierarchy, inheritance, and data types.

Advanced Java programming provides focused instruction on the specialized concepts encompassed within Core Java. Advanced Java is capable of performing various database manipulations, including complex ones, and developing sophisticated web pages. Advanced Java is a programming language that is primarily based on Core Java. However, it emphasizes the intricate principles necessary for the development of large-scale applications.

Uses 

Core Java facilitates the development of multiple types of apps. These programs rarely require a specific operating system to function. Multimedia games like Snake, calculators, and event organizers are just a few examples.

More complex applications often call for the kind of enterprise-level software that can only be built with the help of advanced Java. For one thing, it facilitates the development of both mobile and web-based applications. Since these apps typically run on complex servers and require data extraction from databases, advanced Java is a good fit.

Scope

Core Java covers the fundamental features and concepts of the Java programming language, including language syntax, basic libraries, object-oriented programming, multithreading, and exception handling.

Advanced Java builds upon Core Java and encompasses different technologies, frameworks, and APIs that extend the capabilities of Java for enterprise-level development. It includes web development, database connectivity, distributed computing, and integration with other technologies.

Complexity

Core Java focuses on the essential building blocks of the language and provides a solid foundation for Java development. It is relatively more straightforward to learn, making it suitable for beginners.

Advanced Java deals with more complex concepts and requires a good understanding of Core Java. It involves learning advanced frameworks, design patterns, and techniques for developing sophisticated applications.

Concepts Covered

Core Java covers language fundamentals, object-oriented programming, basic I/O operations, collections, exception handling, multithreading, and basic networking. It provides the core features required for general-purpose programming.

Advanced Java covers topics such as web development using Servlets, JavaServer Pages (JSP), and JavaServer Faces (JSF); database connectivity with JDBC and ORM frameworks like Hibernate; enterprise application development with technologies like Enterprise JavaBeans (EJB) and Java Message Service (JMS); XML processing; web services; and more. It focuses on specialized areas of Java development.

Application Development

Core Java is suitable for developing standalone applications, command-line utilities, basic desktop applications, and simple server-side programs.

Advanced Java is geared towards developing more advanced and complex applications, especially web-based applications, enterprise-level systems, distributed systems, and applications that require integration with databases and external services.

Type of Application

This programming basically covers the socket, swings, AWT, classes, collection objects, and thread concepts.

Advanced java programming only works for enterprise and web-based applications.

Edition/Version of Java

The J2SE (Java Standard Edition) falls under Core Java.

The J2EE (Java Enterprise Edition) falls under Advanced Java.

Coding Platform

Core Java normally comes into play when writing on Java Standard Edition (Java SE).

Advanced Java is useful when coding on the Java Enterprise Edition (Java EE).

Purpose

Core Java does not deal with socket programming, databases, etc.

Advanced Java deals with DOM, socket programming, and network applications.

Package

This programming language provides the java.lang.* package.

This programming language provides the java.servlet.* package.

Core Java provides the foundational knowledge and skills required to start programming in Java. At the same time, Advanced Java expands upon that foundation and equips developers with specialized tools and frameworks for building sophisticated applications in specific domains.

Career Scope for Core Java Learners

Core Java offers various career opportunities in software development and programming. Some of the potential career paths and job roles related to Core Java include:

  1.  Java Developer: Core Java is essential for becoming a Java developer. Java developers are responsible for designing, coding, and testing Java applications. In addition, they work on various software projects, including web applications, mobile apps, and enterprise systems.
  2.  Software Engineer: Software engineering roles highly value core Java knowledge. Software engineers use Java to develop robust and scalable software solutions, focusing on designing and implementing efficient algorithms and data structures.
  3. Application Developer: Core Java skills are crucial for building applications across different platforms. Application developers use Java to create software applications for desktop, web, and mobile devices, catering to diverse user requirements.
  4. BackendBackend Developer: Core Java is commonly used for backend development. BackendBackend developers build server-side components and APIs that power web applications, integrate databases, handle business logic, and ensure smooth data flow.
  5. Software Architect: Core Java proficiency is valuable for software architects who design and oversee the structure and organization of complex software systems. They leverage Java's object-oriented programming capabilities to create scalable and maintainable architectures.
  6.  Test Automation Engineer: Core Java is widely employed in test automation frameworks. Test automation engineers utilize Java to write automated tests, ensuring the quality and reliability of software applications through continuous testing.
  7.  Technical Consultant: Core Java expertise allows individuals to work as technical consultants, providing guidance and solutions to clients on Java-based projects, optimizing code performance, troubleshooting issues, and advising on best practices.
  8. Java Instructor/Trainer: Those proficient in Core Java can pursue teaching roles as Java instructors or trainers. They can impart their knowledge and expertise to aspiring developers through educational institutions or by conducting training programs.
  9. Freelance/Independent Developer: Core Java skills provide the flexibility to work as a freelance or independent Java developer, taking on projects, developing custom software solutions, and catering to specific client requirements.
  10.  Research and Development: Core Java knowledge is valuable for research and development (R&D) roles, especially in developing new Java frameworks, libraries, and technologies or in academia to advance the field of Java programming.

These are just a few examples of career opportunities with Core Java skills. The demand for Java professionals remains high across various industries, making Core Java a valuable asset for those interested in software development and programming careers.

Career Scope for Advanced Java Developers

An advanced Java developer possesses additional expertise in frameworks, technologies, and concepts beyond Core Java, which opens up a more comprehensive range of career opportunities. Here are some potential career paths and job roles for advanced Java developers:

  1. Java Web Developer: Advanced Java developers can specialize in web development using frameworks like Servlets, JavaServer Pages (JSP), JavaServer Faces (JSF), and Spring MVC. They create dynamic and interactive web applications, work on front-end and backend development, and integrate databases and external services.
  2. Full Stack Java Developer: Full stack developers are proficient in front-end and backend development. Advanced Java developers with knowledge of web frameworks, front-end technologies (HTML, CSS, JavaScript), and backend frameworks (Spring Boot, Hibernate) can work as full-stack Java developers, building end-to-end applications.
  3. Enterprise Java Developer: Advanced Java developers with expertise in technologies like Enterprise JavaBeans (EJB), Java Persistence API (JPA), Java Message Service (JMS), and Java Transaction API (JTA) can specialize in developing scalable enterprise-level applications. They work on distributed systems, integration with legacy systems, and enterprise software architectures.
  4.  Java Framework Developer: Advanced Java developers can contribute to developing and enhancing Java frameworks and libraries. They work on open-source projects, contribute to community-driven frameworks like Spring, Hibernate, or Apache Struts, and improve existing functionalities or develop new features.
  5.  Big Data Developer: Advanced Java developers can use big data technologies like Apache Hadoop and Apache Spark, leveraging Java for data processing, analysis, and building scalable data-driven applications. They work with large datasets, develop algorithms, and implement distributed computing solutions.
  6.  Cloud Developer: Advanced Java developers with knowledge of cloud technologies like Amazon Web Services (AWS), Microsoft Azure, or Google Cloud Platform (GCP) can build cloud-native applications, deploy and manage applications on cloud infrastructure, and leverage cloud services for scalability and resilience.
  7. DevOps Engineer: Advanced Java developers can specialize in DevOps practices, using tools like Jenkins, Docker, and Kubernetes for continuous integration, deployment, and monitoring of Java applications. They automate build processes, manage infrastructure, and ensure smooth application delivery.
  8.  Technical Lead/Architect: Advanced Java developers with significant experience and expertise can progress to technical lead or architect roles. They oversee the technical aspects of projects, design software architectures, guide development teams, and make high-level decisions regarding technology choices and system designs.
  9. Consultant/Advisor: Advanced Java developers can work as consultants or advisors, providing technical guidance and solutions to clients or organizations. They offer expertise in Java-related technologies, help with code optimization and performance tuning, and advise on best practices and architectural decisions.
  10.  Entrepreneurship: Advanced Java developers can leverage their skills to start their own software development company, offering custom Java-based solutions, application development services, or specialized products in niche domains.

These are just a few examples of the career paths available for advanced Java developers. With in-depth knowledge of Java frameworks, technologies, and industry trends, advanced Java developers are well-positioned for challenging and rewarding roles in software development, enterprise solutions, and cutting-edge technologies.

A Comprehensive Guide to Java Database Connectivity

JDBC (Java Database Connectivity) is a Java API that provides a standard way to interact with databases. It allows Java applications to connect to different database systems, execute SQL queries, retrieve and manipulate data, and manage database transactions. JDBC acts as a bridge between Java programs and databases, enabling seamless database integration in Java applications.

Architecture Of JDBC

The architecture of JDBC (Java Database Connectivity) consists of three main components: the JDBC API, the JDBC Driver Manager, and the JDBC Driver. Let's take a closer look at each element:

1. JDBC API:

The JDBC API provides a set of interfaces and classes that define the methods and functionality for interacting with databases. It acts as a bridge between the Java application and the database. The key interfaces and courses in the JDBC API include the following:

  • Connection: The Connection interface represents a connection to the database. It provides methods for establishing a connection, executing SQL statements, managing transactions, and retrieving metadata about the database.
  • Statement: The Statement interface executes SQL statements and retrieves results. It supports three types of statements: Statement (for basic SQL statements), PreparedStatement (for parameterized SQL statements), and CallableStatement (for executing stored procedures).
  • ResultSet: The ResultSet interface represents the result of a database query. It provides methods for traversing and manipulating the data returned by a SQL query. For example, developers can retrieve data from the result set using methods like next(), getString(), agent (), etc.

2. JDBC Driver Manager:

The JDBC Driver Manager is responsible for managing the JDBC drivers. It provides methods to load and select an appropriate driver and establish connections to the database. The critical role of the Driver Manager includes:

  • Loading drivers: The DriverManager class provides the registered driver () method to load and write JDBC drivers. This allows the JVM to recognize and use the specified driver class.
  • Selecting a driver: The DriverManager class maintains a list of registered drivers and selects an appropriate driver based on the database URL provided. The driver that can handle the URL is chosen to establish a connection.
  • Establishing a connection: The DriverManager class provides the getConnection() method to connect to the database using the selected driver. It requires the database URL, username, and password as parameters.

3. JDBC Driver:

The JDBC Driver is a software component that implements the JDBC API for a specific database system. Different types of JDBC drivers are available, including:

  • JDBC-ODBC Bridge: This driver allows Java applications to connect to databases through ODBC (Open Database Connectivity) drivers. It acts as a bridge between the JDBC API and the ODBC API.
  • Native API Driver: This driver uses the native API provided by the database system to establish a connection. It communicates directly with the database server using system-specific protocols.
  • Network Protocol Driver: This driver uses a network protocol, such as TCP/IP, to connect to a database server. It sends requests over the network to the database server and receives responses.
  • Thin Driver: This pure Java implementation communicates with the database server using a specific network protocol. It does not require any additional software installation.
  • Each type of JDBC driver has advantages and considerations, depending on factors such as performance, platform compatibility, and database system support.

The JDBC architecture consists of the JDBC API, which defines the interfaces and classes for interacting with databases; the JDBC Driver Manager, which manages the JDBC drivers; and the JDBC Driver, which implements a specific database system. These components enable Java applications to connect to databases, execute SQL queries, and manipulate data efficiently.

Easy Tips to create JDBC Application

To create a JDBC (Java Database Connectivity) application, you need to follow several steps. Here's a general outline:

1. Load the JDBC driver: Before establishing a connection to the database, you need to load the JDBC driver class. This step is necessary for older versions of JDBC. For newer versions (JDBC 4.0 and above), the driver is automatically loaded. Use the `Class.forName()` method to dynamically load the driver class.

 For example:

```java

Class.forName("com.mysql.jdbc.Driver");

```

2. Establish a database connection: Use the `DriverManager.getConnection()` method to establish a connection to the database. Provide the appropriate database URL, username, and password as parameters. 

For example:

```java

String url = "jdbc:mysql://localhost:3306/mydatabase";

String username = "your_username";

String password = "your_password";

Connection connection = DriverManager.getConnection(url, username, password);

```

java

Replace "localhost:3306" with the actual database host and port, and "mydatabase" with the name of your database.

3. Create a statement: Once the connection is established, create a `Statement`, `PreparedStatement`, or `CallableStatement` object. These objects allow you to execute SQL queries and interact with the database. For example:

```java

Statement statement = connection.createStatement();

```

Alternatively, you can use a `PreparedStatement` for parameterized queries or a `CallableStatement` for executing stored procedures.

4. Execute SQL queries: Use the statement object to execute SQL queries by calling the appropriate methods. For example, to execute a SELECT query and retrieve results:

```java

ResultSet resultSet = statement.executeQuery("SELECT * FROM your_table");

```

For other types of queries (e.g., INSERT, UPDATE, DELETE), use the `executeUpdate()` method instead.

5. Process the results: If executing a SELECT query, iterate over the `ResultSet` object to retrieve and process the returned data. Use the appropriate methods, such as `getString()`, `getInt()`, etc., to retrieve values from the result set. For example:

```java

while (resultSet.next()) {

    String column1Value = resultSet.getString("column1");

    int column2Value = resultSet.getInt("column2");

    // Process the retrieved values

}

```

6. Close resources: It is important to free up resources and close the database-related objects once you're done. Close the `ResultSet`, `Statement`, and `Connection` objects in reverse order. For example:

```java

resultSet.close();

statement.close();

connection.close();

```

Closing resources ensures proper cleanup and releases database connections back to the connection pool.

7. Handle exceptions: Wrap the JDBC code in a `try-catch` block to handle any potential exceptions that may occur during database operations. Handle exceptions appropriately, whether by logging errors, displaying error messages, or taking alternative actions.

Remember to include the necessary JDBC driver JAR file in your project's classpath. The driver JAR file is specific to the database you're connecting to.

These steps provide a general framework for creating a JDBC application. However, depending on your specific requirements and the type of queries you want to execute, you may need to adjust and extend the code accordingly.

Conclusion

Learning Java can be a smart investment for your career, there are numerous java tutorial for beginner programmers offering a wide range of benefits and opportunities. Whether you aim to become a full-stack developer, work on enterprise solutions, or delve into cutting-edge technologies like machine learning or blockchain, a solid understanding of Java will provide a strong foundation. The popularity, versatility, and robustness of Java make it a sought-after skill in the job market, enabling you to pursue a rewarding and fulfilling career in the ever-evolving field of software development. So, seize the opportunity and embark on your journey to master Java programming language.  

FAQs

Q1. Is it important to learn both core and advanced Java features?

Ans:- Learning both core and advanced Java features is crucial for becoming a proficient Java developer. Core Java provides a solid understanding of the language's fundamentals, allowing developers to write basic programs and grasp object-oriented programming concepts. Advanced Java features expand upon this foundation, enabling developers to tackle more complex tasks and develop applications for specific domains such as web development, enterprise systems, or graphical interfaces.

Q2. How can I learn Java programming effectively?

Ans:- To learn Java programming effectively, it is recommended to start with a strong foundation in core Java concepts. Understand variables, data types, control structures, and object-oriented principles. Practice writing code, solve programming exercises, and work on small projects to reinforce your learning. Once comfortable with core Java, gradually explore advanced topics based on your interests and goals, such as GUI programming, web development, or database connectivity.

Q3. Are there any resources available for learning Java programming?

Ans:- Yes, there are numerous resources available for learning Java programming. You can refer to online java tutorials for advanced programmers , Java programming books, video courses, and interactive coding platforms. Additionally, joining Java programming communities and participating in forums can help you connect with experienced developers and gain insights and guidance throughout your learning journey. The tutorial also helps in preparing a candidate for a job interview.

Q4. Can Java be used for mobile app development?

Ans:- Yes, Java can be used for mobile app development, specifically for Android applications. Android apps are primarily developed using Java programming language, along with the Android Software Development Kit (SDK) and specific Android APIs. Java syntax and concepts are used to build the logic and functionality of the app.

Q5. Are online Java learning courses suitable for beginners?

Ans:- Yes, online Java learning courses are suitable for beginners. Many online tutorials for java are designed to start from the basics and gradually progress to advanced topics. They provide clear explanations, step-by-step instructions, and practical examples to help beginners grasp the fundamentals of Java programming.


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    JanBask Training

    A dynamic, highly professional, and a global online training course provider committed to propelling the next generation of technology learners with a whole new way of training experience.


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