Java Platform, Micro Edition
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| Java Platform, Micro Edition | |
|---|---|
| Name | Java Platform, Micro Edition |
| Developer | Oracle Corporation |
| Initial release | 1999 |
| Latest release | Platform Maintenance Updates |
| Programming language | Java |
| Operating system | Cross-platform |
| License | GNU General Public License (for some implementations) |
Java Platform, Micro Edition is a modular computing platform designed for embedded and mobile devices, facilitating application development for constrained hardware. It provides a set of APIs and runtime libraries targeting appliances, sensor nodes, feature phones, and consumer electronics, and has been used in products by companies such as Nokia, Sony Ericsson, Samsung Electronics, Motorola, and BlackBerry Limited. The platform has intersected with standards and organizations like the Java Community Process, the Eclipse Foundation, the OpenJDK Project, and the Linux Foundation through implementations and tooling.
Overview
The platform originated to enable applications on devices from vendors including Ericsson, Siemens, LG Corporation, Panasonic, and Sharp Corporation, and aligned with mobile ecosystems exemplified by Symbian Ltd., Palm, Inc., Microsoft Windows Mobile, Apple Inc., and Google. Its ecosystem involved chipmakers such as Qualcomm, Texas Instruments, Broadcom, and Intel Corporation, along with semiconductor foundries like TSMC and GlobalFoundries. Mobile carriers and service providers including Vodafone Group, AT&T, Deutsche Telekom, China Mobile, and Telefónica deployed applications built on the platform in conjunction with handset manufacturers and application stores operated by companies like Nokia Ovi Store and BlackBerry World.
Architecture and Components
Core components of the platform map to specifications defined by organizations such as the Java Community Process and reference implementations maintained by projects like OpenJDK Project and the Eclipse Foundation's Java ME workgroups. The architecture separates a minimal runtime similar to concepts used by HotSpot Virtual Machine and GraalVM from optional APIs modeled after libraries from Apache Software Foundation projects including Apache Harmony efforts. Security and cryptography integration referenced standards from IETF, PKCS#11, and algorithms implemented by vendors like RSA Security and Nokia Siemens Networks. Connectivity stacks used protocols from 3GPP, IEEE 802.11, Bluetooth SIG, and IETF specifications, while media frameworks took cues from MPEG, 3GPP, and RealNetworks codecs.
Editions and Profiles
The platform historically offered modular profiles akin to application profiles in standards such as POSIX and containerized models championed by Docker, Inc.. Profiles and configurations were developed to support device classes represented by vendors like Siemens, Alcatel-Lucent, and HTC Corporation. Targeted profiles supported technologies and services tied to WAP Forum, OMA, and content distribution systems like Ringtone formats used by Nokia and Motorola. The platform's modular editions enabled interoperability with ecosystems maintained by firms such as Sony, LG, Panasonic, and middleware providers like TIBCO Software.
Development and Tooling
Developers relied on integrated development environments and tools produced by Sun Microsystems, Oracle Corporation, Eclipse Foundation, NetBeans, IBM, Microsoft, and independent vendors including IntelliJ IDEA maker JetBrains. Build systems and continuous integration used platforms and services from Apache Maven, Gradle, Jenkins, Travis CI, and GitHub. Debugging and profiling leveraged tools and techniques pioneered by gdb, Valgrind, and virtual machine tooling from HotSpot Virtual Machine and GraalVM. The developer community organized around events and standards meetings hosted by JavaOne, FOSDEM, Black Hat USA, Mobile World Congress, and regional conferences such as CEATEC and IFA Berlin.
Deployment and Implementations
Commercial and open implementations emerged from vendors including Oracle Corporation, IBM, Nokia, Sun Microsystems, Esmertec, Phone.com, Aplix Corporation, and MIPS Technologies. Device firmware containing the platform shipped in products by Sony, Samsung Electronics, LG Corporation, Panasonic, Philips, and Toshiba Corporation, while embedded use cases appeared in automotive systems from Bosch, Continental AG, and Denso. Middleware and application distribution involved companies like Opera Software, Adobe Systems, Google, and Apple Inc. where interoperation with platform APIs intersected with services from Amazon.com and eBay. Telecom standard bodies such as 3GPP, ETSI, and ITU influenced deployment constraints and certification regimes adopted by carriers like Vodafone Group and Orange S.A..
History and Standardization
The platform's standards were advanced through the Java Community Process with involvement from corporations such as Sun Microsystems, IBM, Oracle Corporation, Nokia, Motorola', and Sony Ericsson. The path included interactions with open source initiatives such as OpenJDK Project and Apache Software Foundation, and formal standardization discussions touching ISO and regional standards bodies. Key industry milestones overlapped with product launches from Nokia Communicator, Sony Ericsson P900, Motorola RAZR, BlackBerry Pearl, and market shifts introduced by Apple iPhone and Google Android that reshaped mobile application platforms. Over time, stewardship transitioned among entities including Sun Microsystems and Oracle Corporation, while community efforts continued through organizations like the Eclipse Foundation and the Linux Foundation.