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JDT Core/Java8

This page summarizes the work that is being done to add Java™ 8 support into Eclipse.

Java 8 features that are complete and ready to be tested (save for some very minor defects)

  • JSR 308 - Type Annotations
  • Meta data enhancement specification:
    • JEP120: Repeating annotations
    • JEP118: Runtime access to parameter names
  • JSR269 Enhancements for Pluggable Annotation Processor API and javax.lang.model APIs
  • Formatter, Code completion, code navigation, search & indexing, Reconciler support for all the above
  • Basic IDE enablement (AST APIs) for all of Java 8
  • JSR308 type annotations based null analysis (substantially complete - some open issues exist)
  • Default & static Methods in interfaces (part of JSR 335)
  • JSR 335 features are substantially in place except in the areas of overload resolution and type inference.

What work is pending ?

Updates are filed in the top level bug [380190 - Add support for Java SE 8]

JDT UI changes are tracked in JDT UI/Java8

Java 8 features
Lambda Expressions Method references Default Methods Overload resolution Type Inference
Grammar / Parser NA NA
Reconciler NA NA
Error recovery NA NA
Class file generation NA NA
Search Engine (Manoj) NA NA
Code select (Anirban) NA NA
Code completion (Anirban) NA NA

   Substantially complete, with open items
   In Progress

Not Started yet
NA Not Applicable


  • The following lines must be added in all headers of modified files for Java™ 8 implementation:
 * This is an implementation of an early-draft specification developed under the Java
 * Community Process (JCP) and is made available for testing and evaluation purposes
 * only. The code is not compatible with any specification of the JCP.

  • Use the following @since tag on all newly added members: "3.9 BETA_JAVA8"

What to do to set up the IDE

  • You need to install a JDK 8 build as an installed JRE in order to run the tests using the JavaSE-1.8 Execution Environment.
  • If you are going to be running Ant builds (stand-alone or as project builders) using the 1.8 javac target, you should read the following wiki: Ant / Java 8.

Configure a project to use Java 8 features

If you have JDT UI from the BETA_JAVA8 branch, you can simply set the compliance to 1.8. Otherwise you have to manually set the following properties in <project>/.settings/org.eclipse.jdt.core.prefs:



This is a work in progress. The contents of the BETA_JAVA8 branch will be updated as the changes are made to the JSR Specification.

If you need any help with this, please contact the JDT/Core team through either the forum or Bugzilla.

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