Java
旧版本 Java 7 Update 21
所选取版本
Java 7 Update 21
支持的系统
旧的系统版本
Windows ME, 2000, XP, Vista, 7, 8
许可
Proprietary
发布日期
17 April, 2013 (1 year ago )

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下载 Java 7 Update 21
Java 7 Update 21

Java 7 Update 21 (30.2 MB)

okay 46 scans reported this version clean

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系统要求 Java 7 Update 21
  • Windows XP
  • Windows XP x64
  • Windows Vista
  • Windows Vista x64
  • Windows 7
  • Windows 7 x64
  • Windows Server 2003
  • Windows Server 2008
  • Windows Server 2003 x64
  • Windows 8
  • Windows 8 x64
程序信息 Java 7 Update 21
版本名称:
Java 7 Update 21

文件大小:
30.2 MB

发布日期:
17 April, 2013 (1 year ago)

MD5 校验码:
0B6E48314406E571AE9E4F09BABE94F8

SHA1 校验码:
620472DC1E7D015ED9A7700B846565A707946FCB

版本历史 Java 7 Update 21
Java™ SE Development Kit 7, Update 21 (JDK 7u21) The full version string for this update release is 1.7.0_21-b11 (where "b" means "build") except for Mac OS X for which it is 1.7.0_21-b12. The version number is 7u21.…

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关于 Java

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".


更新 : Java 更新

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Java software allows you to run applications called "applets" that are written in the Java programming language. These applets allow you to have a much richer experience online than simply interacting with static HTML pages.