CODEWITHSUNDEEP
javamaveneclipse-plugineclipse-rcptycho
cbd
cbd

Reputation: 646

Maven Tycho compilation failure

I am using maven and tycho plug-in to build an eclipse RCP application. I use some java 8 features like lambda expression, but it could not build correctly because of compilation failure.

[ERROR] Failed to execute goal org.eclipse.tycho:tycho-compiler-plugin:1.0.0:compile (default-compile) on project ***.***: Compilation failure: Compilation failure:      
[ERROR]     .filter(Objects::nonNull)
[ERROR]             ^^^^^^^^^^^^^^^^
[ERROR] Method references are allowed only at source level 1.8 or above
[ERROR] 2 problems (2 errors)
[ERROR] -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException

My questions are:

Upvotes: 3

Views: 2429

Answers (3)

Ralf Renz
Ralf Renz

Reputation: 1061

I had the same problem and the solution was to set JAVA_HOME to the right JDK.

Upvotes: 0

cbd
cbd

Reputation: 646

As mentioned in the tycho-compiler-plugin documentation, the information in file .settings/org.eclipse.jdt.core.prefs will be passed to the compiler.

It is necessary then to update the file as follow:

org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
org.eclipse.jdt.core.compiler.compliance=1.8
org.eclipse.jdt.core.compiler.source=1.8

Upvotes: 6

Ahmad Shahwan
Ahmad Shahwan

Reputation: 1984

You have to specify the source level in your pom.xml file:

<project>
  <properties>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
  </properties>
</project>

This has nothing to do with tycho, it is the compiler plugin.

You can alternatively configure the plugin itself.

Please refer to this page.

Upvotes: 0

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