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https://issues.apache.org/jira/browse/DERBY-6998?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16639139#comment-16639139
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Rick Hillegas commented on DERBY-6998:
--------------------------------------
Good point. That code should be whacked since recent versions of Derby won't
run on anything before Java 8. But I didn't take the time to whack the dead
code--I just wanted the tests to run on Java 11. Cheers!
> Make it possible to build Derby cleanly using JDK 10
> ----------------------------------------------------
>
> Key: DERBY-6998
> URL: https://issues.apache.org/jira/browse/DERBY-6998
> Project: Derby
> Issue Type: Bug
> Components: Build tools
> Affects Versions: 10.15.0.0
> Reporter: Rick Hillegas
> Priority: Major
> Attachments: derby-6998-01-ab-tightenReturnType.diff,
> derby-6998-02-aa-supportForJDK11.diff,
> derby-6998-03-aa-reenableEncryptionTestsOnJDK11.diff,
> derby-6998-04-aa-increaseCertificateLifetime.diff, sslHandshake.tar
>
>
> When I build Derby using JDK 10, I get the following warning:
> {noformat}
> [javac]
> /Users/rhillegas/derby/mainline/trunk/java/engine/org/apache/derby/iapi/types/SqlXmlUtil.java:728:
> warning: [unchecked] getPrefixes(String) in NullNamespaceContext implements
> getPrefixes(String) in NamespaceContext
> [javac] public Iterator getPrefixes(String namespaceURI) {
> [javac] ^
> [javac] return type requires unchecked conversion from Iterator to
> Iterator<String>
> [javac] 1 warning
> {noformat}
> I will clean this up.
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