![]() Developers can explore two incubating modules: the Vector API (JEP 417) and the Foreign Function and Memory API (JEP 419), as well as a preview feature: Pattern Matching for Switch (JEP 420). These include the capability to add Code Snippets in Java API Documentation (JEP 413), which simplifies the addition of sample source code in API documentation, and Simple Web Server (JEP 408) for prototyping and testing. The latest Java Development Kit (JDK) provides updates and improvements with nine JDK Enhancement Proposals (JEPs). Java 18 (Oracle JDK 18) delivers thousands of performance, stability, and security improvements, including nine enhancements to the platform that will further improve developer productivity. Oracle today announced the availability of Java 18, the latest version of the world's number one programming language and development platform. Note the classfiles need to be recompiled to allow the deserialization. Tools/javac ➜ Lambda Deserialization Fails for Object Method References on Interfacesĭeserialization of serialized method references to Object methods, which was using an interface as the type on which the method is invoked, can now be deserialized again. This option is deprecated and may be removed in a future JDK release. The -XX:+UseContainerCpuShares command-line option can be used to revert to the previous behavior. 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. 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. Previous JDK releases used an incorrect interpretation of the Linux cgroups parameter "cpu.shares". Hotspot/runtime ➜ CPU Shares Ignored When Computing Active Processor Count To disable this check, the new "" system property can be set to "true". The InetAddress class methods are updated to throw an for invalid IPv4 address literals. The class has been updated to strictly accept IPv4 address literals in decimal quad notation. The default implementation of these APIs is still supported.Ĭore-libs/ ➜ Update to Detect Ambiguous IPv4 Address Literals The ".useTL" system property and the alternate ThreadLocal implementation of the Subject::current and Subject::callAs APIs have been removed. ➜ Remove the Alternate ThreadLocal Implementation of the Subject::current and Subject::callAs APIs ![]() Installation instructions are located on the Java SE documentation site. Some compatibility-breaking changes were required to close potential security holes or to fix implementation or design bugs. Most failures to do so are considered bugs, except for a small number of cases where compatibility was deliberately broken, as described on our compatibility web page. Although some incompatible changes were necessary, most software should migrate to the current version with no changes. Every effort has been made to support programs written for previous versions of the Java platform. See the JDK 18 Migration Guide for a list of known compatibility issues. These files are not intended for external use.
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