Alex Buckley, David Holmes, John Rose, Maurizio Cimadamore, Paul Sandoz Summary Introduce hidden classes, which are classes that cannot be used directly by the bytecode of other classes. Hidden classes are intended for use by frameworks that generate classes at run time and use them indirectly, via reflection. A hidden class may be defined as a member of an access control nest, and may be unloaded

Summary Introduce nests, an access-control context that aligns with the existing notion of nested types in the Java programming language. Nests allow classes that are logically part of the same code entity, but which are compiled to distinct class files, to access each other's private members without the need for compilers to insert accessibility-broadening bridge methods. Non-Goals This JEP is no

Introduction Java SE 10 introduced type inference for local variables. Previously, all local variable declarations required an explicit (manifest) type on the left-hand side. With type inference, the explicit type can be replaced by the reserved type name var for local variable declarations that have initializers. The type of the variable is inferred from the type of the initializer. There is a ce

This is the second edition of this document. Relative to the initial edition this edition introduces material on compatibility and migration, revises the description of reflective readability, reorders the text to improve the flow of the narrative, and is organized into a two-level hierarchy of sections and subsections for easier navigation. There are still many open issues in the design, the reso

JMH is a Java harness for building, running, and analysing nano/micro/milli/macro benchmarks written in Java and other languages targetting the JVM. Links Source Repository Mailing List (archive) Bugs

Graal Project a quest for the JVM to leverage its own J Mission The Graal OpenJDK project grew out of the Maxine VM project. In the context of the Maxine VM, Graal demonstrated that a compiler written in Java (with all its software engineering advantages) could generate highly optimized code without compromising on compile times. Graal was then spun off as an OpenJDK project in 2012 to bring these

Summary Define a standard means to invoke the equivalents of various java.util.concurrent.atomic and sun.misc.Unsafe operations upon object fields and array elements, a standard set of fence operations for fine-grained control of memory ordering, and a standard reachability-fence operation to ensure that a referenced object remains strongly reachable. Goals The following are required goals: Safety

JSR 335 (Lambda Expressions for the Java Programming Language) supports programming in a multicore environment by adding closures and related features to the Java language. The JSR has reached its Final Release; these changes to the platform are part of the umbrella JSR 337 and have been integrated into Java SE 8 (modifying the language, JVM, and library specifications). Project Lambda produced th