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How to Learn Java

Java is an object-oriented coding language. It’s brought notable interactivity to the web. Today, Java is used in cell phones, financial computers, app development and more.

Java is unique from other coding languages because it allows code to be written once and run anywhere. Other coding languages may need to be translated by a compiler and put into instructions for devices, but Java may be written the same way for various platforms. While some people may confuse Java and JavaScript due to a similar name, they are not related. Though JavaScript was first created as a companion to Java, the two don’t have any modern-day connections.

Keep reading to find out how Java is used and tips for how to learn the computer language.

How Is Java Language Used?

Java is the server-side language used for most back-end development projects. It’s also used for numerical computing in big data projects, gaming, and desktop and mobile computing.

Some of the basic aspects of Java language include variables, operators, expressions, statements and blocks, and control flow statements.

Software developers enjoy Java for a variety of reasons. First, it’s highly portable, which makes it easy to use it on a variety of platforms and applications. Second, as an object-oriented language, it makes complex problems easier to solve by providing a modular format that’s reusable. This makes testing and troubleshooting easier. Next, its code is reliable, secure and robust because it isn’t prone to errors. Finally, it’s arguably simpler to learn than other languages like C and C++.

Java works by creating objects using classes defined by attributes (data) and behaviors (methods). These data sets may be replicated. Other features like inheritance help simplify the code. Inheritance works by linking similar but different objects with common attributes and behaviors. This way, common code may be used while notating differences.

Overall, Java is a useful language for creating code that’s stable across many uses. That’s why it’s the backbone of many back-end website development projects and used in Android app development, game development, desktop applications and more.

For aspiring data scientists specifically, Java is also worth knowing because much of the big data ecosystem is built on it. Apache Hadoop and Apache Spark, two of the most widely used tools for processing large datasets, both run on the Java Virtual Machine, and many data engineering roles expect at least a working familiarity with Java or a closely related JVM language like Scala or Kotlin.

For those looking into how to learn Java, some basic coding skills may be helpful. These technological and educational prerequisites may be beneficial:

  1. 1

    Download the right technology.

  2. 2

    Keep your problem-solving, reasoning and math skills sharp.

  3. 3

    Learn the basics of an object-oriented language.

  4. 4

    Go to the source.

  5. 5

    Attend a Bootcamp.

  6. 6

    Find the right learning environment for you.

Learning any new skill can be difficult. With a few simple strategies, how to learn Java may become a bit easier. Here are some strategies to help you learn Java:

  1. 1

    Code on paper.

  2. 2

    Focus on fundamentals.

  3. 3

    Seek out online resources.

  4. 4

    Practice teaching.

  5. 5

    Maintain a fast typing speed.

Frequently Asked Questions

Are you ready to investigate how to learn Java and gain valuable skills related to a popular programming language? This section covers frequently asked questions related to Java.

If you have additional questions about Java or are interested in other programming languages, explore the best programming language to learn for you.

While it’s possible to teach yourself coding, it may be quicker to join a class, bootcamp or formal learning program. Before diving into a class or bootcamp, you may consider teaching yourself some Java fundamentals. You may even continue teaching yourself supplemental concepts as you study through a formal program. If you decide to teach yourself Java, be mindful of knowledge gaps; you simply don’t know what you don’t know. Another difficult aspect of self-teaching is making sure your sources are reliable. There’s a number of information sources available so be sure to find credible ones.

Information last updated: July 2026