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annotate content/Maven/default-jdk-for-cross-jdk-profiles.md @ 72:c2b99e876559 pelican_comment_system

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use the pelican_plugin_system from the standard pelican plugins instead of my own simple_comments
author Dirk Olmes <dirk@xanthippe.ping.de>
date Sat, 02 Jan 2016 04:47:39 +0100
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1 Title: Default JDK for cross JDK project profiles with Maven
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2 Date: 2009-04-25
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3 Lang: en
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5 In my [previous blog post about Cross JDK project files with Maven](|filename|./cross-jdk-project-files-continued.md) I described a way to generate a custom JDK name into the Eclipse project files using the `maven-eclipse-plugin`.
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7 That approach still had one shortcoming: you would either have to rename your JDK to match the default configured in the POM or you would have to give the JDK name on the commandline. Now I stumbled over a [good tip on the maven user's list](http://maven.40175.n5.nabble.com/org-apache-maven-plugins-maven-eclipse-plugin-2-7-SNAPSHOT-ignores-maven-compiler-plugin-td120284.html#a120285) that allows you to configure a sensible, cross platform default for the JDK.
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9 In short, the trick is not to use a concrete name of a JDK but to specify the name of a Java runtime environment. Eclipse automatically tries to match any configured JDK to an internal list of runtime environments.
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11 So if you put the following into your pom:
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13 :::xml
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14 <properties>
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15 <vmtype>org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType</vmtype>
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16 <jdk5Name>J2SE-1.5</jdk5Name>
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17 </properties>
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18 ...
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19 <plugin>
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20 <groupId>org.apache.maven.plugins</groupId>
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21 <artifactId>maven-eclipse-plugin</artifactId>
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22 <version>2.5.1</version>
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23 <configuration>
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24 <downloadSources>true</downloadSources>
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25 <classpathContainers>
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26 <classpathContainer>org.eclipse.jdt.launching.JRE_CONTAINER/${vmtype}/${jdk5Name}</classpathContainer>
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27 </classpathContainers>
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28 </configuration>
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29 </plugin>
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31 Eclipse will assign a JDK5 runtime environment to the project (if it has a matching one configured, of course).