軟體下載 Java JDK 17.0.4 (64-bit)

• 1

  版本確認

• 2

  檔案準備中

• 3

  檔案下載

What's new in this version:

New Features:
Core-libs/java.net:
HTTPS Channel Binding Support for Java GSS/Kerberos:
- Support has been added for TLS channel binding tokens for Negotiate/Kerberos authentication over HTTPS through javax.net.HttpsURLConnection.
- Channel binding tokens are increasingly required as an enhanced form of security which can mitigate certain kinds of socially engineered, man in the middle (MITM) attacks. They work by communicating from a client to a server the client's understanding of the binding between connection security (as represented by a TLS server cert) and higher level authentication credentials (such as a username and password). The server can then detect if the client has been fooled by a MITM and shutdown the session/connection.
- The feature is controlled through a new system property jdk.https.negotiate.cbt which is described fully in the Networking Properties page.

Other Notes:
Core-libs/java.util.jar:
Default JDK Compressor Will Be Closed when IOException Is Encountered:
- DeflaterOutputStream.close() and GZIPOutputStream.finish() methods have been modified to close out the associated default JDK compressor before propagating a Throwable up the stack. ZIPOutputStream.closeEntry() method has been modified to close out the associated default JDK compressor before propagating an IOException, not of type ZipException, up the stack.

Hotspot/runtime:
CPU Shares Ignored When Computing Active Processor Count:
- Previous JDK releases used an incorrect interpretation of the Linux cgroups parameter "cpu.shares". This might cause the JVM to use fewer CPUs than available, leading to an under utilization of CPU resources when the JVM is used inside a container.
- Starting from this JDK release, by default, the JVM no longer considers "cpu.shares" when deciding the number of threads to be used by the various thread pools. The -XX:+UseContainerCpuShares command-line option can be used to revert to the previous behavior. This option is deprecated and may be removed in a future JDK release.