Java is an object-oriented programming language released in 1995. It is compiled and uses mainly JVM (Java Virtual Machine) to execute code. Java supports the static type of checking for programs, so the mistakes and other issues are revealed during the compilation.
It is mostly used for back-end development and is the official language of Android App Development (and also the most popular for developing Android apps). The source code is compiled into an unreadable byte code which enhances its security.
Java is a great option for application development: mobile for Android, desktop and web enterprise apps. You can go with Java in case there is a need for big data analytics and server-side development.
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