Eclipse and Java 9

Manoj & SarikaIBM

Agenda

Introduction to Java 9 feature JRT

Eclipse JDT Core support

Eclipse JDT Debug Support

Demo

Modular Images

Modules

List of modules in release file

rt.jar removed

Implementation specific internal format

Jimages

How is JDT Core affected?

IDEs and other kinds of development tools require the ability to enumerate the class and resource files stored in a run-time image, and to read their contents. Today they often do this directly by opening and reading rt.jar and similar files. This will, of course, not be possible with a modular image.

jrt:/[$MODULE[/$PATH]]

jrt:/$MODULE/$PATH refers to the specific class or resource file named $PATH within the given $MODULE.

jrt:/$MODULE refers to all of the class and resource files in the module $MODULE.

jrt:/ refers to the entire collection of class and resource files stored in the current run-time image.

Enumeration

Enumeration and reading of classes is provided by a built-in filesystem provider.

A copy of this filesystem provider suitable for use on JDK 8 will be placed in the root directory of JDK 9 run-time images, in a file named jrt-fs.jar.

Eclipse - Java 9 Package Explorer

Eclipse Java 9 Package Explorer -2

Eclipse Java 9 Search plus PE

JDT Details & Future Work

Parallel branch BETA_Java9

MODULES/PACKAGES ongoing.

Java Model enhancements under discussion

JEP availability other Java 9 features

Performance/Opt at a stable state

Java 9 Execution Environment

New run-time image structure

Removal of the endorsement-standards override and the extension mechanism

JDT Debug

Thank You

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