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Compared to the Java SE environment, several APIs are absent entirely, and some APIs are altered such that code requires explicit changes to support CLDC. In particular, certain changes are not just the absence of classes or interfaces, but actually change the signatures of existing classes in the base class library.
cross-compile from Windows to Java ME: Yes No No GPL: Morfik: Morfik Technology Pty Ltd. 2.0.5.27 Yes Yes Yes compiles to HTML+CSS+XML+JavaScript (web apps) Yes Yes Yes Proprietary: MSEide: Martin Schreiber 4.6 / 2017-11-24 Yes Yes No FreeBSD: Yes Yes Yes GPL; LGPL with static linking exception for the library MSEgui Understand: SciTools 4.0 ...
1.8 No Yes Yes No Yes HotSpot, Oracle JDK edition Reference implementation. 1.8 No Yes Yes No Yes HotSpot, Java SE embedded edition ? No Yes Yes No Yes HotSpot, Zero port Interpreter-only port of OpenJDK using almost no assembly language and designed to be very portable. 1.7 No Yes Yes No No IKVM.NET? ? ? Whatever the .NET runtime uses JAmiga ...
The Java virtual machine is an abstract (virtual) computer defined by a specification. It is a part of the Java runtime environment. The garbage collection algorithm used and any internal optimization of the Java virtual machine instructions (their translation into machine code) are not specified. The main reason for this omission is to not ...
The Java platform is a suite of programs that facilitate developing and running programs written in the Java programming language. A Java platform includes an execution engine (called a virtual machine), a compiler and a set of libraries; there may also be additional servers and alternative libraries that depend on the requirements.
GCJ the GCC Java compiler, that compiles either to bytecode or to native machine code. As of GCC 7, gcj and associated libjava runtime library have been removed from GCC. [1] IKVM.NET – Java for Mono and the Microsoft .NET Framework. Uses OpenJDK. Zlib License. JamVM – developed to be an extremely small
As green threads have some limitations compared to native threads, subsequent Java versions dropped them in favor of native threads. [9] [10] An exception to this is the Squawk virtual machine, which is a mixture between an operating system for low-power devices and a Java virtual machine.
For instance, a Java program has to be written to use the Java virtual machine (JVM) and associated libraries as a platform but does not have to be adapted to run on the Windows, Linux or Macintosh OS platforms. However, the JVM, the layer beneath the application, does have to be built separately for each OS. [8]