IDE module not compiling with JDK 1.8 due to lack of desktop package in awt

[raiman]

IDE module not compiling with JDK 1.8 due to lack of desktop package in awt

[RaiMan]

Sorry, I do not support 1.1.3 anymore.

But yes: you have to build with at least Java 9 (recommended Java 11).
... but the artefacts run on Java 8+

[RaiMan]

BTW: In the java source you can find:

/**
 * This class only compiles with Java 9+
 * If you want to compile with Java 8, you have to hide this classfile<br>
 * (is possible, because it is accessed in Java 9 only using reflection)
 */

[paul-hammant]

There's a couple of ways that the POM can explicitly note JDK 9+. Here's one:

<build>
        <pluginManagement>
            <plugins>
                <plugin>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <version>3.8.0</version>
                    <configuration>
                        <source>1.9</source>
                        <target>1.9</target>
                    </configuration>
                </plugin>

[RaiMan]

@paul-hammant
Thanks for the hint, but that is not what is needed.
Both source and target have to be Java 8

What is needed is an option to exclude the mentioned classfile from compilation, when the build runs on Java 8. I did not find such an option until now.

so only hiding the classfile in this case IMHO helps.

[paul-hammant]

Towards tactical exclusion: One or both of Joe Walnes' QDox or XStream does stages of JDK compilation into the same jar, in order to take advantage of JDK-specific classes in JDK 5, 6, 7+. Well I say Joe, but there were multiple contributors towards that. Specifically, multiple runs through with Javac, then a single zipping into a Jar that's adaptive between those JDKs. That was 10 years ago, and the need for that homogenization may be gone now.