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https://issues.apache.org/jira/browse/DERBY-7126?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17445307#comment-17445307
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Richard N. Hillegas commented on DERBY-7126:
--------------------------------------------

When I build Derby with JDK build 18-ea+23-1525, I get the following new 
warnings:

{noformat}
    [javac] 
/Users/rhillegas/derby/mainline/trunk/generated/java/org.apache.derby.tools/org/apache/derby/impl/tools/ij/ij.java:2776:
 warning: [deprecation] exec(String) in Runtime has been deprecated
    [javac]                 Process p = 
Runtime.getRuntime().exec(stringValue(cmd.image));
    [javac]                                                 ^
    [javac] 1 warning
    [javac] 
/Users/rhillegas/derby/mainline/trunk/java/org.apache.derby.tests/org/apache/derbyTesting/functionTests/harness/FileCompare.java:279:
 warning: [deprecation] exec(String) in Runtime has been deprecated
    [javac]             pr = Runtime.getRuntime().exec(diffCmd);
    [javac]                                      ^
    [javac] 
/Users/rhillegas/derby/mainline/trunk/java/org.apache.derby.tests/org/apache/derbyTesting/functionTests/harness/RunList.java:647:
 warning: [deprecation] exec(String) in Runtime has been deprecated
    [javac]                 Process prstop = Runtime.getRuntime().exec(stopCmd);
    [javac]                                                      ^
    [javac] 
/Users/rhillegas/derby/mainline/trunk/java/org.apache.derby.tests/org/apache/derbyTesting/functionTests/harness/UnJar.java:79:
 warning: [deprecation] exec(String) in Runtime has been deprecated
    [javac]                 pr = Runtime.getRuntime().exec(jarCmd);
    [javac]                                          ^
    [javac] 
/Users/rhillegas/derby/mainline/trunk/java/org.apache.derby.tests/org/apache/derbyTesting/functionTests/tests/replicationTests/ReplicationRun.java:1509:
 warning: [deprecation] exec(String) in Runtime has been deprecated
    [javac]             Process proc = rt.exec(localCommand);
    [javac]                              ^
    [javac] 
/Users/rhillegas/derby/mainline/trunk/java/org.apache.derby.tests/org/apache/derbyTesting/functionTests/util/JarUtil.java:59:
 warning: [deprecation] exec(String) in Runtime has been deprecated
    [javac]             pr = Runtime.getRuntime().exec(jarCmd);
    [javac]                                      ^
    [javac] 5 warnings
{noformat}


> Make it possible to build and test Derby cleanly with OpenJDK 18
> ----------------------------------------------------------------
>
>                 Key: DERBY-7126
>                 URL: https://issues.apache.org/jira/browse/DERBY-7126
>             Project: Derby
>          Issue Type: Task
>          Components: Build tools
>    Affects Versions: 10.16.0.0
>            Reporter: Richard N. Hillegas
>            Assignee: Richard N. Hillegas
>            Priority: Major
>         Attachments: DERBY_7126_A.java, dcl_emc2sm.jar, 
> derby-7126-01-aa-regenerateSignedJars.diff
>
>
> Releases of Open JDK 18 can be found at https://jdk.java.net/178. We should 
> adjust Derby as necessary so that it builds cleanly (including javadoc) and 
> tests cleanly with this version of the platform.



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