Browse free open source Java Code Editors and projects below. Use the toggles on the left to filter open source Java Code Editors by OS, license, language, programming language, and project status.

  • Custom VMs From 1 to 96 vCPUs With 99.95% Uptime Icon
    Custom VMs From 1 to 96 vCPUs With 99.95% Uptime

    General-purpose, compute-optimized, or GPU/TPU-accelerated. Built to your exact specs.

    Live migration and automatic failover keep workloads online through maintenance. One free e2-micro VM every month.
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  • Ship Agents Faster Icon
    Ship Agents Faster

    Transform your applications and workflows into powerful agentic systems at global scale.

    Gemini Enterprise Agent Platform lets you rapidly build, scale, govern and optimize production-ready agents grounded in your organization's data. The platform enables developers to build custom or pre-built agents for virtually any use case. New customers get $300 in free credits.
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  • 1
    NullAway

    NullAway

    A tool to help eliminate NullPointerExceptions (NPEs) in your code

    NullAway is a tool to help eliminate NullPointerExceptions (NPEs) in your Java code. To use NullAway, first add @Nullable annotations in your code wherever a field, method parameter, or return value may be null. Given these annotations, NullAway performs a series of type-based, local checks to ensure that any pointer that gets dereferenced in your code cannot be null. NullAway is similar to the type-based nullability checking in the Kotlin and Swift languages, and the Checker Framework and Eradicate null checkers for Java. NullAway is fast. It is built as a plugin to Error Prone and can run on every single build of your code. In our measurements, the build-time overhead of running NullAway is usually less than 10%. NullAway is also practical: it does not prevent all possible NPEs in your code, but it catches most of the NPEs we have observed in production while imposing a reasonable annotation burden, giving a great "bang for your buck."
    Downloads: 0 This Week
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  • 2
    Oracle Database Front-End with database navigation, code editor, syntax highlighting and tab completion for database objects.
    Downloads: 0 This Week
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  • 3
    Octclipse

    Octclipse

    Octave Eclipse GUI

    Octave development environment built upon Eclipse's Dynamic Languages Toolkit (http://www.eclipse.org/dltk/). Distributed as an Update site for Eclipse 3.7 Indigo and Indigo-based package for several platforms. Supports search, autocompletion, launching scripts, interactive console, debug and integrated plotting on Octave versions 3.2.x, 3.4.x and 3.6.x. The current goal is to make it running out-of-box on multiple platforms. Currently only Linux and Windows are supported. Mac support is possible. The project needs a maintainer for Mac version, since I don't have Mac to build Octclipse and test it on this platform. Also, it is worth to support Eclipse 4.0 Juno with DLTK 4.
    Downloads: 0 This Week
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  • 4
    Swing Artist

    Swing Artist

    Mini Java IDE and Swing builder

    The aim of this project is to build an IDE for Java language which can be used to develop GUI based applications easily without knowing about the GUI components in detail. The idea is to enable users to make GUI as if they are using paint application to draw a design and later generating the code for it. The project also includes a built in Code Editor for editing Java applications. The code editor can also be used to edit file of any supported text file format. The work is focused on the layout of the components that gives the interface a clear and consistent look, conforming to specifiable interface guidelines, in an application and across applications. This interface builder provides an environment for specifying component and layout specifications for the interface of Java applets and applications. The tool enables anyone who knows the semantics of the Java Abstract Windowing Toolkit (java.awt) to build quality interfaces. This is achieved by integrating general design principles
    Downloads: 0 This Week
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  • Go from Code to Production URL in Seconds Icon
    Go from Code to Production URL in Seconds

    Cloud Run deploys apps in any language instantly. Scales to zero. Pay only when code runs.

    Skip the Kubernetes configs. Cloud Run handles HTTPS, scaling, and infrastructure automatically. Two million requests free per month.
    Try it free
  • 5
    codeSlinger is source code editor / integrated development environment designed for programmers. It is flexible enough to be used with virtually any programming language, yet powerful enough to develop large projects. codeSlinger itself, for instance was
    Downloads: 0 This Week
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  • 6
    Tje is an java source code editor written in java using SWT. The main goal is to have a small and fast editor with some nice features as code completion, source browsing ...
    Downloads: 0 This Week
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