Mika VM is an open-source implementation of the Java virtual machine specification, together with class libraries which implement the

Connected Device Configuration The Connected Device Configuration (CDC) is a specification of a framework for Java ME applications describing the basic set of libraries and virtual-machine features that must be present in an implementation. The CDC is combined with one or more pr ...

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. Mika VM is based on Wonka VM, which was developed independently of any other implementation, including Sun Microsystem's RI. The same is true of most of the class libraries, but in this case some code is drawn from the

GNU Classpath GNU Classpath is a free software implementation of the standard class library for the Java programming language. Most classes from J2SE 1.4 and 5.0 are implemented. Classpath can thus be used to run Java-based applications. GNU Classpath is a p ...

and Apache Harmony projects. MikaVM support MIDP (Mobile Information Device Profile) 1.0 and 2.0, CDC (Connected Device Configuration)

Personal Profile Personal may refer to: Aspects of persons' respective individualities * Privacy * Personality * Personal, personal advertisement, variety of classified advertisement used to find romance or friendship Companies * Personal, Inc., a Washington, ...

. Mika VM was created by one of the original Wonka VM developers after Acunia's demise and the acquisition of its assets by Punch International. The original intention was to create a smaller VM (a mini- or micro-Wonka, hence the name) which would be useful for example on

ARM7TDMI ARM7 is a group of 32-bit reduced instruction set computer, RISC ARM architecture, ARM processor cores licensed by ARM Holdings for microcontroller use. The ARM7 core family consists of ARM700, ARM710, ARM7DI, ARM710a, ARM720T, ARM740T, ARM71 ...

devices with no MMU. In time however Mika became a full replacement for Wonka, and may be considered as its successor. Mika is based on the Wonka codebase, and is also open source under the

BSD license BSD licenses are a family of permissive free software licenses, imposing minimal restrictions on the use and distribution of covered software. This is in contrast to copyleft licenses, which have share-alike requirements. The original BSD lice ...

. Like Wonka, Mika is intended for use in embedded devices. The VM and class libraries are therefore purposely limited to the packages required by the

OSGi OSGi is an open specification and open source project under the Eclipse Foundation. It is a continuation of the work done by the OSGi Alliance (formerly known as the Open Services Gateway initiative), which was an open standards organization fo ...

Execution Environment, and features introduced in Java5 or later are not supported. This results in a smaller footprint, with non-AWT versions requiring less than 2 MB of persistent storage. Supported operating systems are

Linux Linux ( or ) is a family of open-source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991, by Linus Torvalds. Linux is typically packaged as a Linux distribution, w ...

and uClinux (a proof-of-concept port to

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has also been made), and supported architectures include x86, arm, mips, and powerpc, including non-MMU variants where applicable. In principle it should be possible to build Mika for any 32-bit CPU for which a GNU toolchain is available.

References

{{Java Virtual Machine Java virtual machine Software using the BSD license

See also

References