JEP 455 introduced Primitive Types in Patterns, instanceof, and switch as a preview feature in JDK 23. It continues as a preview feature in JDK 24 and 25, so the feature is not detailed in the Java ...

I am using Disjoint Set Union (DSU) and Union Find to solve a graph problem. The entry point function takes an input string with coordinates defined by (line number, char number), starting at the top ...

I try to update java version from 22 to 23. We work with off-heap memory: val intVh = MemoryLayout .sequenceLayout( Long.MaxValue / ValueLayout.JAVA_INT.byteSize(), ValueLayout....

I have an old android project and I am on the process of shifting to AndordX and updated gradle. When I build the project I receive the below error for some dependency, what could possibly be the ...

In Java 21 and 23, java.net.InetAddress is declared public sealed class InetAddress implements Serializable permits Inet4Address, Inet6Address { However, the following code: switch (addr) { case ...

I am trying the following code for performance checking. It is purely CPU-bound, doing lots of calculations on double types, single-threaded, and does not use any heap: public class PerfTestSampleJ { ...

Why does this code lead to a java.lang.IllegalThreadStateException? newSingleThreadScheduledExecutor(Thread::startVirtualThread).scheduleWithFixedDelay( () -> System.out.println("Hello, ...

I'm exploring Java Stream Gatherers, a preview feature introduced in Java 22, and I'm using Java 23 with preview features enabled for this purpose. My primary goal here is to better understand how the ...

I had an interview today, and the interviewer presented the following code. They asked what the output would be in Java 8 and the latest version of Java. From my understanding, since B is an inner ...

Java 23 now allows Markdown Documentation Comments I am experimenting with this feature right now in latest IntelliJ IDEA 2024.2.2 (community) and with GraalVM for JDK 23 as Java runtime. It seems the ...