I have a toy program that has a compilation error only in Eclipse when I try to use a Chronicle import and compile to language level 11. The program compiles and runs in maven, and also in IntelliJ (with the same maven and JDK).
The versions I have are:
- maven 3.6.1
- jdk openjdk version "11" 2018-09-25
- eclipse 2020-03-R
- chronicle-bom 2.19.199 (supported java11 since 2.17)
This is my pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>testjava11</groupId>
<artifactId>chronicle-test</artifactId>
<version>0.0.1-SNAPSHOT</version>
<properties>
<maven.compiler.source>11</maven.compiler.source>
<maven.compiler.target>11</maven.compiler.target>
</properties>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>net.openhft</groupId>
<artifactId>chronicle-bom</artifactId>
<version>2.19.199</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>net.openhft</groupId>
<artifactId>chronicle-map</artifactId>
</dependency>
</dependencies>
</project>
And here is my simple test class:
import net.openhft.chronicle.bytes.BytesMarshallable;
public class App {
public static void main(String[] args) {
System.out.println("BytesMarshallable: " + new BytesMarshallable() {});
}
}
The output when running exec:java directly with maven is
[INFO] Scanning for projects...
[INFO]
[INFO] ---------------------< testjava11:chronicle-test >----------------------
[INFO] Building chronicle-test 0.0.1-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ chronicle-test ---
[INFO] Deleting C:\Users\eclipse-workspace\chronicle-test\target
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ chronicle-test ---
[WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] Copying 0 resource
[INFO]
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ chronicle-test ---
[INFO] Changes detected - recompiling the module!
[WARNING] File encoding has not been set, using platform encoding Cp1252, i.e. build is platform dependent!
[INFO] Compiling 1 source file to C:\Users\eclipse-workspace\chronicle-test\target\classes
[INFO]
[INFO] --- exec-maven-plugin:3.0.0:java (default-cli) @ chronicle-test ---
BytesMarshallable: App$1@309d6b5b
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2.400 s
[INFO] Finished at: 2020-06-11T15:04:53+02:00
[INFO] ------------------------------------------------------------------------
It compiles in IntelliJ and this is the output when I run as a Java Application:
BytesMarshallable: App$1@39fb3ab6
Process finished with exit code 0
However, in Eclipse the class App will not compile. The error is on the import line and says:
The type java.lang.String cannot be resolved. It is indirectly referenced from required .class files
There is an additional message in the Problems panel:
The project was not built since its build path is incomplete.
Cannot find the class file for java.lang.String.
Fix the build path then try building this project
But I don't see what the issue is in my build path:
Furthermore, I can see java.lang is present in the package explorer:
(Note that if I change the language level to 8, but still using JDK 11, it will work in Eclipse.)
I have checked for obvious issues (build path, maven/jdk path) and everything appears correct to me. Why do I get this error in Eclipse and how can I fix it?
