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How can I get the execution environment JavaSE-1.8 in Eclipse? [message #976646]

Thu, 08 November 2012 18:50

Mohsen Vakilian

Messages: 11
Registered: June 2011

Junior Member

I'd like to bring the question at http://stackoverflow.com/q/13295275/130224 to the attention of this forum. If you know the answer, please reply either on this forum or stackoverflow.com.

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Re: How can I get the execution environment JavaSE-1.8 in Eclipse? [message #976666 is a reply to message #976646]

Thu, 08 November 2012 19:05

Thomas Schindl

Messages: 6651
Registered: July 2009

Senior Member

There's not Java8 execution env (EE) yet specified by OSGi as far as I
know!

Beside that there are more EE to speced for Java8 because we'll have the
Compact1, Compact2, Compat3 (=Java8 SE) EEs because of the missing jigsaw.

Ideally your EE and compiler settings are equal but that's not a must so
you can set your compiler Java8 and use the syntax.

Tom

Am 08.11.12 19:50, schrieb Mohsen Vakilian:
> I'd like to bring the question at
> http://stackoverflow.com/q/13295275/130224 to the attention of this
> forum. If you know the answer, please reply either on this forum or
> stackoverflow.com.

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Re: How can I get the execution environment JavaSE-1.8 in Eclipse? [message #976679 is a reply to message #976666]

Thu, 08 November 2012 19:24

Mohsen Vakilian

Messages: 11
Registered: June 2011

Junior Member

Tom,

1. How can I set the source code level to 1.8 without having an EE?
2. Please note that the instructions at http://wiki.eclipse.org/JDT_Core/Java8#What_to_do_to_set_up_the_IDE indicate that I have to install the EE for JavaSE-1.8. However, the instructions don't specify how to get the EE.

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Re: How can I get the execution environment JavaSE-1.8 in Eclipse? [message #976693 is a reply to message #976679]

Thu, 08 November 2012 19:38

Stephan Herrmann

Messages: 1853
Registered: July 2009

Senior Member

For the time being, where neither OSGi nor JDT/UI support 1.8, please manually change your file <project>/.settings/org.eclipse.jdt.core.prefs to contain these lines:

org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
org.eclipse.jdt.core.compiler.compliance=1.8
org.eclipse.jdt.core.compiler.source=1.8

HTH,
Stephan

PS: beware that all this is incomplete work in progress.

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Re: How can I get the execution environment JavaSE-1.8 in Eclipse? [message #976698 is a reply to message #976693]

Thu, 08 November 2012 19:42

Mohsen Vakilian

Messages: 11
Registered: June 2011

Junior Member

Stephan,

Thanks! I just edited org.eclipse.jdt.core.prefs seconds before seeing the responses on this forum and stackoverflow.

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Re: How can I get the execution environment JavaSE-1.8 in Eclipse? [message #976865 is a reply to message #976666]

Thu, 08 November 2012 22:43

Stephan Herrmann

Messages: 1853
Registered: July 2009

Senior Member

Thomas Schindl wrote on Thu, 08 November 2012 20:05

Ideally your EE and compiler settings are equal but that's not a must so
you can set your compiler Java8 and use the syntax.

Depends on the kind of experiment. The new default methods, e.g., require a new JRE for running.

And as soon as the new class file version is used (not yet) older VMs will not accept the class files we create from 1.8 sources.

best,
Stephan

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