The include directory is for header files, such as jni.h, that are needed when compiling C/C++ code that uses JNI and other native interfaces. It’s nothing to do with jlink. The jlink tool can create a run-time image for another platform (cross targeting). You need to download two JDKs to do this. One for the … Read more
Module: A new language feature introduced in Java 9 (similar to class, interface, package, etc.) that consists of a collection of packages, similar to how a package consists of a collection of types. JAR: An archive file format that bundles code and resources and which can be loaded by the JVM. More specifically, a module … Read more
You can make use of the Collectors.filtering API introduced since Java-9 for this: Map<String, List<Employee>> output = list.stream() .collect(Collectors.groupingBy(Employee::getDepartment, Collectors.filtering(e -> e.getSalary() > 2000, Collectors.toList()))); Important from the API note : The filtering() collectors are most useful when used in a multi-level reduction, such as downstream of a groupingBy or partitioningBy. A filtering collector differs … Read more
After some research I believe we can rule this out as a Junit or hamcrest issue. Indeed, this seems to be a JDK bug. The following code will not compile in JDK > 8: AnyOf<Iterable<? super String>> matcher = CoreMatchers.anyOf( CoreMatchers.hasItem(“d”), CoreMatchers.hasItem(“e”), CoreMatchers.hasItem(“f”)); Error:(23, 63) java: incompatible types: inference variable T has incompatible bounds equality … Read more
Based on your demo project, I was able to duplicate your error. That said, here are the revised changes I made, after my first failed attempt, to be able to build the project: I added the maven-compiler-plugin version 3.8.0 to all the modules. You need a version of 3.7 or higher to compile modules with … Read more
I have solved it by downgrading Gradle JVM to 8. It is not perfect but keeps you going while jdk9 and gradle and intellij stabilises. Intellij View
I had exactly the same issue: Can’t start Cassandra (Single-Node Cluster on CentOS7) If it is an option for you, using Java 8, instead of 9, is the simplest way to solve the issue.
You can use the jshell-maven-plugin: mvn com.github.johnpoth:jshell-maven-plugin:1.3:run which will fire up a JShell session with your project’s runtime path. If you want to include your test dependencies just add -DtestClasspath to the command. NOTE: the plugin expects the project to be built already. If not, invoke the appropriate Maven build phase before the plugin e.g: … Read more
You can use class path and module path in parallel, but there are a few details to consider. Dependency Module Path ~> Class Path Explicit modules (JARs with a module descriptor on the module path) can not read the unnamed module (JARs on the class path) – that was done on purpose to prevent modular … Read more
First, to set the record straight, I neither said nor wrote the text quoted above. I’d never have put it that way. That’s just sloppy reporting on the part of the publications involved. The most important thing to understand about class loading and resource lookup in Java 9 is that, at a fundamental level, they … Read more