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What Is Java?

Java is a general-purpose, class-based, object-oriented programming language that features fewer implementation dependencies than other languages. Java offers a high degree of reliability and platform independence, which makes it one of the most widely used programming languages in the world. It was first released by Sun Microsystems in 1995.

Related Reading on Built In21 Java Interview Questions for Junior and Senior Developers

 

What Is Java Used For?

Java is a general-purpose programming language used for developing software applications, Android apps, server-side technology and more.

Java is one of the world’s most widely used programming languages, designed to have as few implementation dependencies as possible to allow compiled Java code the ability to run on all platforms that support Java, without the need for recompilation. 

Due to Java’s widespread support and object-oriented capabilities, it’s used for a wide range of purposes, such as client-server web applications, Android applications and analytic data processing. The programming language, as well as the accompanying software that helps developers write and operate it effectively, offers a high degree of versatility and has continually adapted over the years to remain consistent with developer demands. On the other hand, highly efficient and recently developed languages have emerged to replace Java for certain use cases. For example, Kotlin has largely replaced Java as the language used in Android application development.

Java Tutorial for Beginners. | Video: Programming With Mosh

 

Is Java Still Popular?

Despite being more than 20 years old, Java remains one of the most widely used programming languages in the world. 

Countless programs have been written in Java over the last 25 years, and that alone makes it an important language. According to a 2020 StackOverflow survey of professional developers, Java is the fourth most popular primary programming language, used by 38.4 percent of respondents.

Going hand-in-hand with its ubiquity, Java has been widely used over many generations of software, which has allowed developers to continue updating their applications rather than having to rewrite their code in emerging languages. Java still sees widespread use in server-side development and enterprise systems. Android’s recent departure to Kotlin, however, may present a challenge in maintaining Java’s longevity.

 

How Safe Is Java?

Java is considered to be one of the safest programming languages, but security challenges still exist. 

Due to the fact that nearly half of all software applications have been written in Java over the last two decades, security vulnerabilities are a reality when interacting with many third-party Java applications.

Java itself contains many built-in features to eliminate programming errors that may open up vulnerabilities, such as its type-safe design and automatic memory management that reduces the risk of having too many objects in memory. That said, developers must use secure coding principles like input validation, security audits and consistent code review to ensure application security.

Courses

Expand Your Java Career Opportunities

Solve new challenges and increase your skills with top Java courses from Udemy.

Udemy

Topic:

Java Programming Course for Beginners to Java Object Oriented Programming. BONUS: Build REST API with Spring Boot.

 

What you'll learn:

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4.5
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Udemy

Topic:

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4.6
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Udemy

Topic:

Learn Java In This Course And Become a Computer Programmer. Obtain valuable Core Java Skills And Java Certification

 

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4.6
(154972)
Udemy

Topic:

Become a confident industry ready core Java developer and get certified as a Java professional!

 

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Certifications

Java Certifications + Programs

Udactiy’s top Java certifications can set you on the right course to finding your next career opportunity.

Learn back-end development with the Java programming language, one of the most popular programming languages in the world and one a majority of large enterprises rely on for their infrastructure.

Udacity
Beginner
3 months
10 hours

This Nanodegree program is intended to elevate your Java abilities and teach you the fundamental skills used by Java developers to design, code, test and deploy cutting-edge Java software. It is ideal for programming beginners with little or no Java experience who want to set themselves up for success as a professional Java developer and deploy functional Java-based applications of their own creation.

Udacity
Beginner
3 months
10 hours
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