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A Java processor is the implementation of the Java virtual machine (JVM)

in hardware. In other words, the Java bytecode that makes up the

instruction set of the abstract machine becomes the instruction set of a

concrete machine. These were the most popular form of a

high-level language computer architecture, and were "an attractive

choice for building embedded and real-time systems that are programmed

in Java".cite-ref-binder-1-0[1] However, as of 2017, embedded Java is no longer common and

no realtime Java chip vendors exist.cite-ref-2[2]

• Implementations

• See also

• References

There are several research Java processors tested on FPGA, including:

• picoJava was the first attempt to build a Java processor, by

Sun Microsystems. Its successor picoJava-II was freely available under

the Sun Community Source License,cite-ref-binder-1-1[1] and is still available from some

archives.

• jHISCcite-ref-3[3] provides hardware support for object-oriented functions

• Java Optimized Processorcite-ref-4[4] for FPGAs. A PhD thesis is available, and

it has been used in several commercial applications.cite-ref-binder-1-2[1] In 2019 it was

extended to be energy aware (EAJOP).cite-ref-5[5]

Some commercial implementations included:

• The aJile processor was the most successful ASIC Java processor.cite-ref-binder-1-3[1]

• Cjip from Imsys Technologies. Available on boards and with wireless

radios from AVIDwirelesscite-ref-6[6]

• ARM926EJ-S was an ARM processor able to run Java bytecode, this

technology being named Jazelle.

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