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JDK 15: The new features in Java 15
=>The next version of standard Java will feature text blocks, garbage collectors, hidden classes, and previews of pattern matching and records
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- A second incubator of a foreign-memory access API for accessing foreign memory in a satisfactory manner
- A preview of sealed class which restricts which other classes or interfaces may extend it.
- Removal of code for Solaris/SPARC, Solaris/x64, and Linux/SPARC ports
- A second preview version of Records which is a restricted form of class
- Add of Edwards-Curve Digital Signature Algorithm (EdDSA) signatures
- Reimplementing the legacy DatagramSocket API
- Disabling biased locking, used in the HotSpot Virtual Machine to reduce the overhead of uncontended locking
- A second preview of pattern matching for instanceof
- Add of Hidden classes which are classes that cannot be used directly by the bytecode of other classes
- Z Garbage Collector & Shenandoah low-pause-time garbage collector as feature proposals
- Text blocks which consists of zero or more content characters, enclosed by opening and closing delimiters
- Removal of Nashorn
- Deprecation of the RMI Activation mechanism