#Java-15

Topic	Content
Sealed class	Before Java 15, developers could only use final keyword or scope modifiers to control inheritance. So, sealed classes brings the added flexibility for Java developers when defining class hierarchies. Permitted subclass A permitted subclass that's declared final cannot be extended further. It can be extended further but only by classes that are permitted by the subclass. It may be declared non-sealed can be extended further by any class. The superclass cannot restrict the subclasses further down this class hierarchy. Java's Reflection API also gets two new methods for dealing with sealed classes
Pattern Matching for instanceOF	A type test pattern (used in instanceof) consists of a predicate that specifies a type, along with a single binding variable
Text Blocks	A text block is a multi-line string literal While using text blocks, we do not need to provide explicit line terminators, string concatenations, and delimiters otherwise used for writing the normal string literals.
Records	The record is a new type of class in Java that makes it easy to create immutable data objects Originally introduced in Java 14. Java 15 aims to refine a few aspects before becoming an official product feature. It automatically implement data-driven methods such as constructors, accessors, equals(), hashCode() and toString(). Local Records
EdDSA Algorithm	EdDSA (Edwards-Curve Digital Signature Algorithm) is another additional digital signature scheme added Does not change the execution time based on the length of secret key.