运行JAVA程序不可缺少的环境Java SE Runtime。一旦拥有 Java 软件，您即会进入一个全新的jre8互动世界。
Java语言恐怕是稳居网路应用程序语言的首选了，这都要归功于它高度的安全性以及跨平台的特性，几乎在目前所有的电脑平台上您都可以见得到Java的芳踪。过去很可能会有不少人抱怨Java虽然有著相当不错的跨平台以及安全防护等特性，但是它的执行速度远远不及C++等各种传统惯用的程序语言。不过这次Sun Microsystem可是有备而来的，不仅在执行速度上有大幅度的改革，而且在内容上也有做了一些修改以及增强。最新JAVA运行库，建立一个运行JAVA的环境。这一升级版对Java Plug­in进行了功能增强，提供了对Netscape 6 Open JVM整合支持等等。由于JRE新增的功能以及程序修正之处相当多
JavaFS Release Notes: JavaFS is now part of JDK. JDK 7u51 release includes JavaFS version 2.2.51. New Features and Changes: Jarsigner updated to encourage>
timestamping Timestamping for a signed jar is now strongly recommended. The Jarsigner tool will print out an informational warning at signing or verifying when timestamp is missing. Changes to Security Slider: [b]The following changes to Security Slider were included in this release(7u51) Block Self­Signed and Unsigned applets on High Security Setting Require Permissions Attribute for High Security Setting Warn users of missing Permissions Attributes for Medium Security Setting Change in Default Socket Permissions: The default socket permissions assigned to all code including untrusted code have been changed in this release. Previously, all code was able to bind any socket type to any port number greater than or equal to 1024. It is still possible to bind sockets to the ephemeral port range on each system.
