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Bryan Pendleton commented on DERBY-6856: ---------------------------------------- Hi Rick, Knut Anders: Danoja Dias was studying the auto-boxing changes in the context of DERBY-6391, and found an interesting bit of code in SQLChar.java: {code} --- java/engine/org/apache/derby/iapi/types/SQLChar.java (revision 1754401) +++ java/engine/org/apache/derby/iapi/types/SQLChar.java (working copy) @@ -2333,7 +2333,7 @@ { throw StandardException.newException( SQLState.LANG_INVALID_ESCAPE_CHARACTER, - new String(escapeCharArray)); + String.valueOf(escapeCharArray)); } likeResult = Like.like(evalCharArray, getLength(), {code} Do either of you have some thoughts about why the Java 9 auto-boxing system didn't detect this case and issue the warning? Would it be appropriate to remove the new String instance in this case as part of the auto-boxing changes? > Make it possible to build Derby using JDK 9 > ------------------------------------------- > > Key: DERBY-6856 > URL: https://issues.apache.org/jira/browse/DERBY-6856 > Project: Derby > Issue Type: Improvement > Components: Build tools > Affects Versions: 10.12.1.1 > Reporter: Rick Hillegas > Attachments: derby-6856-01-ab-addShardingKey.diff, > derby-6856-01-ac-cleanup.diff, derby-6856-02-aa-addShardingKey.diff, > derby-6856-03-aa-autoboxingDeprecationWarnings.diff, > derby-6856-03-ab-autoboxingDeprecationWarnings.diff, > derby-6856-04-aa-autoboxingDeprecationWarnings-part2.diff, > derby-6856-04-ab-autoboxingDeprecationWarnings-part2.diff, > derby-6856-05-ac-roundingMode-Class.newInstance.diff, > derby-6856-05-af-roundingMode-Class.getDeclaredConstructor.diff, > derby-6856-05-ag-roundingMode-Class.newInstance.diff, > derby-6856-06-aa-observable.diff, derby-6856-07-aa-oneMoreNewInstance.diff, > derby-6856-08-aa-cleanupJavadoc.diff, derby-6856-09-aa-javadocEntities.diff, > derby-6856-XX-ab-base.diff, derby-6856-XX-ac-base.diff > > > Derby can't be built with JDK 9. Java 9 introduces new JDBC classes like > java.sql.ShardingKey and methods which refer to these new classes. > In addition, project Jigsaw has created a new way to name classes (see > http://openjdk.java.net/jeps/220). This breaks the PropertySetter build tool > which we use so that old JVMs can compile Derby and so that Derby can be > compiled to run on old JVMs. > It is likely that we will need to leave this issue open throughout the > development cycle of Java 9. -- This message was sent by Atlassian JIRA (v6.3.4#6332)