Java source structure - Java program structure, Import Statement, Types of import statement, packages

Project Valhalla provides a venue to explore and incubate advanced Java and language feature candidates such as - Inline Types, Generic Specialization, Enhanced volatile and more and Project Leyden’s major role will be to address the long-term pain points of java like slow startup time , slow time to pick performance and large footprint.

Java 15 features – text blocks, hidden classes, a foreign-memory access API, preview of sealed classes, and second preview of records.