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
Compressed strings (Java 6) and compact strings (Java 9) both have the same motivation (strings are often effectively Latin-1, so half the space is wasted) and goal (make those strings small) but the implementations differ a lot. Compressed Strings In an interview Aleksey Shipilëv (who was in charge of implementing the Java 9 feature) had … Read more
I assume you are running this under Java 9? You are not altering the SIZED property of the stream, so there is no need to execute either map or peek at all. In other words all you care is about count as the final result, but in the meanwhile you do not alter the initial … Read more
The purpose of JMODs are not well documented and existing documentation is rather sparse. Here is an in-depth explanation of system, from my understanding. Parts of this answer are rather long, verbose, partially redundant, and a tough read. Constructive, structural, or grammatical edits are more than welcome to improve readability for future readers. Short(er) Answer … Read more
When compiling an unnamed module, java.xml.bind is not accessible by default, but in a modular project (as in this question) failing to resolve reference to module java.xml.bind was a bug (see edit below). To work around this until the bug is fixed, you can explicitly include module java.xml.bind by double click on Is modular (see … Read more
The module system does not distinguish between production code and test code, so if you choose to modularize test code, the prod.module and the test.module cannot share the same package com.acme.project, as described in the specs: Non-interference — The Java compiler, virtual machine, and run-time system must ensure that modules that contain packages of the … Read more
There are ways to disable illegal access warning, though I do not recommend doing this. 1. Simple approach Since the warning is printed to the default error stream, you can simply close this stream and redirect stderr to stdout. public static void disableWarning() { System.err.close(); System.setErr(System.out); } Notes: This approach merges error and output streams. … Read more
Found the answer based on intellij output:) I had to add the location of the classes to the vm arguments in the run configurations as well as the module name/path to main. like below. See the java -help command for more info regarding -m and -p
Just add this <forceJavacCompilerUse>true</forceJavacCompilerUse> to your maven compiler build plugin in your POM and you’ll see all the javac errors! Source with more details
The short answer is that, yes, you’ll have to convert the libraries to explicit modules. The jlink tool is intended to provide a trimmed binary image that has only the required modules. The issue is that automatic modules have access to the classpath (aka the unnamed module) which can read all JDK modules. So nothing … Read more