I’m currently trying to fiddle with images, specifically convert images from JPEG, WEBP, and BMP forms to PNG forms and my method uses the javax.imageio.ImageIO class. When I tried importing it, Eclipse yelled that the package that the type was not accessible. I thought that was weird and went digging t…
Tag: java-16
Minor question about Segmented Code Cache (http://openjdk.java.net/jeps/197)
I see that this JEP (http://openjdk.java.net/jeps/197) introduced 3 types of code caches. The most obvious one to me is -XX:NonNMethodCodeHeapSize. This is the one that deals with JVM internal data. What I do not understand is what is the difference between NonProfiledCodeHeapSize and ProfiledCodeHeapSize. Th…
How do I create a jar file via the command line?
Lets say I have these .java files: MainClass.java 2ndClass.java BarClass.java FooClass.java Then I turn them into .class files: MainClass.class 2ndClass.class BarClass.class FooClass.class How would I make it a jar file, and have MainClass.class be the first to be loaded? Answer Observing what Elliott said ab…
How to provide JAXB dependency via Gradle package?
TLDR: Which packages (and with which scopes) does one has to include for: using JAXB in a library using XJC in a library running tests in that library include the library as a dependency into another library without having JAXB related runtime errors Details: I’m working with JAXB and XJC with JDK 16 an…
Install Java 16 on Raspberry Pi 4
I have tried multiple releases from here using : But after java -version I always get: Which means I have chosen the wrong release/architecture. Is there a release that works with Raspberry Pi’s or is there another way to install Java 16? Answer Answering my own question. cd [minecraft directory here] w…
IOException in Java 8 when reading PKCS12 keystore created with keytool from OpenJDK16
TL;DR keytool from OpenJDK16 creates PKCS12 keystore files that cannot be read from Java 8, 9, 10 and 11. Is this a bug? How to create a PKCS12 keystore that works with Java 8? Context I build a Maven project which produces an executable JAR file that must run on any JRE from version 8 to version 16. That JAR
Java record serialization and repeated calls to canonical constructor
In this post about serializable records it is stated that Deserialization creates a new record object by invoking a record class’s canonical constructor, passing values deserialized from the stream as arguments to the canonical constructor. This is secure because it means the record class can validate the val…
What annotation targets are applicable to Java records?
I have an annotation used for methods or fields defined like this: I wanted to prevent users from using this on a record since it wouldn’t make sense for this annotation to be used in that context. It seems doing this should not compile since I don’t specify ElementType.PARAMETER as a valid @Targe…
How to use @ConfigurationProperties with Records?
Java 16 introduced Records, which help to reduce boilerplate code when writing classes that carry immutable data. When I try to use a Record as @ConfigurationProperties bean as follows I get the following error message: How can I use Records as @ConfigurationProperties? Answer Answering my own question. The a…
IntelliJ JDK 16 Early Access – Any Success? tools.jar
Has anyone had any success using JDK 16 (https://jdk.java.net/16/) early access build with IntelliJ? I am able to use JDK 15 early access builds, but when I try JDK 16 I get an error message: All of the research I’ve done says JDK stores tools.jar inside of the path/to/jdk-16/lib folder. Thing is, tools…