Java is a general-purpose, concurrent, class-based, object-oriented programming language specifically designed to have as few implementation dependencies as possible. It lets application developers 'write once, run anywhere' (WORA), meaning that coders can write a single application and compile it on many platforms without rewriting it. These targeted applications include enterprise software systems, applets, browser plugins, J2ME apps, and other applications that have already driven the popularity of Java technology on the server and the embedded platform.
Nix package manager solves the problem of inconsistent, incomplete package state by enforcing complete state by default. Nix provides atomic upgrades and rollbacks, side-by-side installation of multiple versions of a package, multi-user support, per-user profiles, and improved conflicts resolution. It also has powerful user environment management which makes it easy to work with multiple profiles.
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