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Bug 271333

Summary:	Missing hint for interface default method (since Java 8)
Product:	java	Reporter:	Peter Nabbefeld <epdv>
Component:	Hints	Assignee:	Svata Dedic <sdedic>
Status:	NEW ---
Severity:	normal	CC:	dtrebbien
Priority:	P3
Version:	Dev
Hardware:	PC
OS:	Linux
Issue Type:	DEFECT	Exception Reporter:

Description Peter Nabbefeld 2017-08-20 20:31:09 UTC

If an interface method contains a body but is missing the "default" keyword, there's an error mark with a hint "interface abstract methods cannot have a body".

This is true before Java 8, but since then it should be sth. like "interface methods may only have a body when declared as default", providing the possibility to add the keyword.

Comment 1 Peter Nabbefeld 2017-08-21 05:45:07 UTC

Hm, probably this bug is related to maven, as I've found some other problems now when trying to compile (source format and compiler set to Java 8):
- "PluginConfig.java:[19,8] PluginConfig is not abstract and does not override abstract method getSpringConfigurationDelegate() in ServerPluginConfig"
- Due to some tutorials, without the "default" keyword the method should just be static.

So it seems, though I've set the project properties to use Java 8, maven doesn't use the correct Java version. Maybe a problem with the Super POM?

Comment 2 Peter Nabbefeld 2017-08-21 06:21:47 UTC

The description of static interface methods I found was incorrect, so interface methods for Java 8 should have a hint to either add "default" or "static".

Comment 3 Peter Nabbefeld 2017-08-21 06:55:36 UTC

Hm, the maven-only problem with compiling is no more reproducible, so only the hint should still be fixed.