Example: For Java 8 Update 65 (8u65) the file to download is jre-8u65-macosx-x64.pkg. Notifications about disabled Java and restoring prompts. The installer notifies you if Java content is disabled in web browsers, and provides instructions for enabling it.
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Java can run applications developed using the java programming language and set of development tools. The JVM is a crucial component of the Java platform. The availability of JVMs on many types of hardware and software platforms enables Java to function both as middleware and a platform in its own right.
Hence the expression 'Write once, run anywhere.' Starting with J2SE 5.0, changes to the JVM specification have been developed under the Java Community Process as JSR 924.
As of 2006, changes to specification to support changes proposed to the class file format (JSR 202) are being done as a maintenance release of JSR 924. The specification for the JVM is published in book form, known as 'blue book'.