Here is the migration guide for Java 9, New Class Loader Implementations JDK 9 maintains the hierarchy of class loaders that existed since the 1.2 release. However, the following changes have been made to implement the module system: The application class loader is no longer an instance of URLClassLoader but, rather, of an internal class. … 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
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
Well it turns out there is another reason for the randomized iteration order. It’s not a big secret or anything. I thought I had explained it in that talk, but maybe not. I probably mentioned it on the OpenJDK mailing lists or perhaps in internal discussions. In any case, another reason for randomized iteration order … 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
Arrays.asList returns a mutable list while the list returned by List.of is immutable: List<Integer> list = Arrays.asList(1, 2, null); list.set(1, 10); // OK List<Integer> list = List.of(1, 2, 3); list.set(1, 10); // Fails with UnsupportedOperationException Arrays.asList allows null elements while List.of doesn’t: List<Integer> list = Arrays.asList(1, 2, null); // OK List<Integer> list = List.of(1, 2, … Read more
Although the question was asking about the Object.finalize method, the subject really is about the finalization mechanism as a whole. This mechanism includes not only the surface API Object.finalize, but it also includes specifications of the programming language about the life cycle of objects, and practical impact on garbage collector implementations in JVMs. Much has … Read more
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
You’ll have to hack the script bin/catalina.sh to get this to work. There are a bunch of lines like this in bin/catalina.sh: exec “$_RUNJDB” “$LOGGING_CONFIG” $LOGGING_MANAGER $JAVA_OPTS $CATALINA_OPTS \ -Djava.endorsed.dirs=”$JAVA_ENDORSED_DIRS” -classpath “$CLASSPATH” \ … Just remove the second of those lines (the one with -Djava.endorsed.dirs) in each case and you should be back in business. … Read more