Countdown to June for Juno

Eclipse Juno Milestone 5 arrives

Chris Mayer

Another milestone down for Eclipse 3.8 and 4.2. Juno is close. This update brings forth key Java Development Tool add-ons

The milestones are coming thick and fast for Eclipse’s next release train Juno. The latest, Milestone 5 was released this week and has added a number of vital functions needed for the 4.2 release of the Eclipse platform.

These include improvements to the platform itself, Java Development Tools (JDT), Plug-in Development Environment (PDE) and Equinox, the OSGi side of the operation. Here’s just a taster of what is New and Noteworthy within Eclipse 3.8 and 4.2 M5.


  • JDT will now raise null related errors/warnings for fields. It has three states in which these errors are raised:

Null pointer access warning


Potential null pointer access warning

Redundant null check warnings

  • The batch compiler can be configured to use annotations for null analysis by passing the token nullAnnot(nullable|nonnull|nonnullbydefault) to the -warn option, where nullable, nonnull and nonnullbydefault are the fully qualified names of the annotation types to be used for null analysis. You can use nullAnnot alone to use JDT’s default annotations.
  • JDT now performs smarter analysis so that resource leak related errors/warnings are ignored in unimportant cases.
  • It is also now possible to encrypt source attachments of libraries.


  • Navigation arrows have been implemented to switch between tabs in the shared area far easier.


  • A new preference page is available to dynamically set the debug-tracing options for Eclipse, through the Tracing Preference page.


  • There is now customisable storage for preference scopes. When defining your own preference scope, you can now extend a simple storage customisation class rather than implementing all the preference logic yourself. In this class you simply define the code to read and write a preference node to whatever backing store you want to use.

For those wanting to go deeper into what has been implemented into Juno so far, the release notes provide all the details you need. With the next milestone scheduled for March 16, we are well on the way to Juno’s judgment day in June. It appears that the bulk has been done towards Juno and we’re excited to see what else is in store for the release.

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