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https://issues.apache.org/jira/browse/MRESOLVER-85?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17945690#comment-17945690
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Piotr Zygielo commented on MRESOLVER-85:
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{quote} If you use -source 9 -target 8 then javac should produce working code.
{quote}
Yeah. But no:
{code}
$ javac -source 9 -target 8 C.java
warning: source release 9 requires target release 1.9
{code}
> Avoid ByteBuffer incompatibility when compiling with JDK9+
> ----------------------------------------------------------
>
> Key: MRESOLVER-85
> URL: https://issues.apache.org/jira/browse/MRESOLVER-85
> Project: Maven Resolver
> Issue Type: Improvement
> Affects Versions: 1.3.2, 1.3.3
> Reporter: Sylwester Lachiewicz
> Priority: Minor
> Time Spent: 20m
> Remaining Estimate: 0h
>
> Restore possibility to create a release with Java9+
>
> The explanation for this is given in
> [apache/felix#114|https://github.com/apache/felix/pull/114] :
> Java 9 introduces overridden methods with covariant return types for the
> following methods in java.nio.ByteBuffer:
> position (int newPosition)
> limit (int newLimit)
> flip ()
> clear ()
> mark ()
> reset ()
> rewind ()
> In Java 9 they all now return ByteBuffer, whereas the methods they override
> return Buffer,
> resulting in exceptions like this when executing on Java 8 and lower:
> {{java.lang.NoSuchMethodError:
> java.nio.ByteBuffer.limit(I)Ljava/nio/ByteBuffer}}
> This is because the generated byte code includes the static return type of
> the method, which is not found on Java 8 and lower because the overloaded
> methods with covariant return types don't exist (the issue appears even with
> source and target 8 or lower in compilation parameters).
> The solution is to cast ByteBuffer instances to Buffer before calling the
> method.
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