Add support for Java 15

[eric-milles]

https://www.oracle.com/news/announcement/oracle-announces-java-15-091520.html

https://www.eclipse.org/eclipse/news/4.17/jdt.php#Java15

[mojo2012]

Hi all,

I'm currently trying to transition to java 15 (from 14) but the groovy compiler plugin seems to have problems with java 15. This is my compiler config.

<groovy.version>3.0.7</groovy.version>

<plugin>
	<artifactId>maven-compiler-plugin</artifactId>
	<extensions>true</extensions>
	<dependencies>
		<dependency>
			<groupId>org.codehaus.groovy</groupId>
			<artifactId>groovy-eclipse-compiler</artifactId>
			<version>3.6.0-03</version>
		</dependency>
		<dependency>
			<groupId>org.codehaus.groovy</groupId>
			<artifactId>groovy-eclipse-batch</artifactId>
			<version>3.0.7-01</version>
		</dependency>
		<dependency>
			<groupId>org.codehaus.groovy</groupId>
			<artifactId>groovy</artifactId>
			<version>${groovy.version}</version>
			<classifier>indy</classifier>
		</dependency>
	</dependencies>
	<configuration>
		<compilerId>groovy-eclipse-compiler</compilerId>
		<compilerArguments>
			<indy />
			<configScript>${pom.basedir}/config.groovy</configScript>
		</compilerArguments>
		<failOnWarning>false</failOnWarning>
		<showWarnings>false</showWarnings>
		<verbose>false</verbose>
	</configuration>
</plugin>

I'm using the latest version of all dependencies. Still I get an error that only java up til 14 is supported. Any idea when the java 15 compiler will be supported?

[eric-milles]

Eclipse 4.18 releases today and then the batch compiler needs to be built. You can build your own version of the batch compiler at any time using these steps: https://github.com/groovy/groovy-eclipse/wiki/Building-Maven-Batch-Compiler

[eric-milles]

https://bintray.com/groovy/maven/groovy-eclipse-batch/3.0.7-02