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The Java language has undergone several changes since JDK 1.0 as well as numerous additions of classes and packages to the standard library.Since J2SE 1.4, the evolution of the Java language has been governed by the Java Community Process (JCP), which uses Java Specification Requests (JSRs) to propose and specify additions and changes to the Java platform.
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.
Sun introduced version 1.0 of Web Start in March 2001, [5] while 64-bit Windows support was added only in Java 6 [6] (later than 64-bit Java was first available). Since J2SE 1.4 Web Start comes as a default part of Java Runtime Environment (JRE) called javaws , computer administrators no longer have to install it separately.
This had a large performance penalty of between a factor 10 and 20 for Java versus C in average applications. [5] To combat this, a just-in-time (JIT) compiler was introduced into Java 1.1. Due to the high cost of compiling, an added system called HotSpot was introduced in Java 1.2 and was made the default in Java 1.3.
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 virtual machine
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