JCreator is not available for Linux but there are some alternatives that runs on Linux with similar functionality. The best Linux alternative is Eclipse, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 10 alternatives to JCreator and six of them are available for Linux so hopefully you can find a suitable replacement. Other interesting Linux alternatives to JCreator are IntelliJ IDEA (Freemium), Apache NetBeans (Free, Open Source), MonoDevelop (Free, Open Source) and BlueJ (Free, Open Source).
IntelliJ IDEA is an integrated development environment (IDE) written in Java for developing computer software. It is developed by JetBrains, and is available as an Apache 2 Licensed community edition, and in a proprietary commercial edition.
MonoDevelop enables developers to write desktop and web applications on Linux, Windows and Mac OS X. It also makes it easy to port .NET applications created with Visual Studio to Linux and Mac OS X maintaining a single code base for all platforms.