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https://issues.apache.org/jira/browse/MAHOUT-618?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13003291#comment-13003291
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Sean Owen commented on MAHOUT-618:
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We had made mahout-math require only Java 1.5 simply for broader compatibility.
It is equally easily possible to remove usages of those offending methods.
However at this stage I am personally comfortable with using Java 6 everywhere
simply for consistency. But it's worth asking if anyone really needs 1.5
compatibility?
> mahout-math's pom.xml should be configured to compile in Java6
> --------------------------------------------------------------
>
> Key: MAHOUT-618
> URL: https://issues.apache.org/jira/browse/MAHOUT-618
> Project: Mahout
> Issue Type: Bug
> Components: Math
> Reporter: Daisuke Miyamoto
> Attachments: mahout-618.patch
>
> Original Estimate: 5m
> Remaining Estimate: 5m
>
> Though Mahout requires JDK6, mahout-math's pom.xml contains plugin
> configuration which direct compile for Java5 as following:
> {code}
> <plugin>
> <groupId>org.apache.maven.plugins</groupId>
> <artifactId>maven-compiler-plugin</artifactId>
> <configuration>
> <source>1.5</source>
> <target>1.5</target>
> </configuration>
> </plugin>
> {code}
> Furthermore RandomWrapper and DistributionChecks uses
> String#getBytes(Charset) and Arrays#copyOf() method.
> These methods are not supported in JDK5.
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