Java is a general-purpose, object-oriented programming language. It’s designed to be a “write once, run anywhere” (WORA) language, which means that its compiled code can run on any platform that supports Java.
Java has been at the prominence of tech development long ago. In 2019, it is still amazingly popular amidst a multiplicity of groups — many corporate applications demand its fixity and dependability.
Start-up companies also obviously strive to hire Java developers, as their products are often interesting. As for the field of implementation it is used for such complex web applications as Google Documents and many others. Android is also particularly dependent on Java-related technologies.