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STM32Java development environment for STM32
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Take advantage of the benefits of object-oriented programming in Java to develop general purpose STM32 applications, in particular, applications with a smartphone-like look and feel graphical user interface (GUI) with STM32Java.

All of the well known advantages of the Java design concepts are available: interface versus implementation, inheritance and composition, polymorphism, garbage collector (GC), multi-tasking, etc.

Software productivity, agility, scalability and security are improved compared to traditional developments in C/C++ code.

Applications can mix C code (legacy control/command code for example) with code developed in Java. STM32Java provides efficient mechanisms to interface the 2 worlds, Simple Native Interface to call C functions from Java code and Shielded Plug to exchange data between the 2 worlds.

STM32Java provides everything required to easily and very quickly develop feature-rich GUIs, relying on the Model-View-Controller (MVC) triad, the best known solution to design flexible and easy to maintain GUIs.

Running STM32Java programs, requires features that are embedded on special STM32 MCU series. There are two sets of special part numbers enabled for Java: MCU part numbers ending with the letter ‘J’ (for mass production) and MCU part numbers ending with the letter ‘U’ (can only be ordered as samples).

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Data Brief

Key Features

  • A single DVD-ROM incorporating:
  • STM32Java Software Development Kit built on MicroEJ®, extending the Eclipse™ IDE
  • Several Java Platforms (JPFs) for STM32: Quick Start JPFs and Production JPFs
  • JPFs can be extended to support specific hardware of the application board
  • Embedded (EmbJPF) and Simulation (SimJPF): the very same Java binary code functionally validated on the SimJPF runs on the sibling EmbJPF
  • MicroUI (Micro User Interface) and MWT (Micro Widget Toolkit) graphical libraries:
  • Targets all major graphical display buffer organizations, monochrome and full color displays
  • Event engine to handle very efficiently and at high speed haptic sensor drivers: buttons, joystick, touch panel, etc.
  • MicroUI (Micro User Interface) and MWT (Micro Widget Toolkit) new graphical libraries available from version 3:
  • UI Layer library: Chrom-ART Accelerator™ management for rich user interfaces.
  • UI Motion, UI transition libraries: to create specific pages motion (linear, ease, bounce, elastic)
  • Tools included:
  • Font designer to design fonts in many ways
  • Story Board designer to quickly specify possible human-machine interaction with the application
  • Front Panel designer to extend the Java platform simulator
  • Very small and efficient Java virtual machine:
  • Flash: less than 30 KB
  • RAM: less than 1.5 KB
  • Startup time: less than 2 ms at 120 MHz
  • 1-year subscription, with hardware dongle


Design Resources


Technical Documentation

Product Specifications

Description Version Size
DB1839: Fully-integrated Java development environment and solution for STM32 MCUs
4.0 79 KB

Technical Notes & Articles

Description Version Size
TN0072: Software toolchains and STM32 features
2.4 98 KB

Presentations & Training Material


Description Version Size
STM32Java offer overall presentation
339 KB

Related Tools and Software

Related Tools and Software

Part Number Description
STM3240G-EVAL Evaluation board with STM32F407IG MCU

Publications and Collaterals


Description Version Size
STM32Cube eases STM32 development
16.01 464 KB

Get Software

Part Number Marketing StatusOrder From STUnit Price (US$)*
@ 1
Distributor Availability
STM32-JAVAActiveBuy Direct2572.5
Distributor NameRegionStockMin. order
Farnell Element14Order NowEUROPE11

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
(**) The Material Declaration forms available on may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
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