Java

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What this language is used for:

E-commerce
Finance
App development

Java is a general use and object-oriented programming language. In object-oriented programming, developers create objects that encompass functions and data, which can then be used to provide structure for programs and applications.

Java currently ranks as the third-most sought-after programming language for hiring managers globally (PDF, 2.4 MB) and has held the #5 spot on Stack Overflow’s list of the most commonly used languages for two years.

Java’s popularity is for good reason; this language is relatively easy to learn and use, boasts incredible security and can handle massive amounts of data. These features make Java an ideal language for the online finance sector, and it is often applied in industries such as banking, billing and the stock market.

The versatility of the language, however, is what learners find really appealing. Touted as a “write-once, run-anywhere” language, Java can effectively run on any operating system, regardless of which OS was used to write the original code. It is thus ideal for writing apps not only for mobile phones and computers, but also remote processors, sensors and a variety of other consumer products.