Currently my Java version is 17. Neo4j requires me to install Java 11 or OpenJDK 11, or else it will give the error java.lang.IllegalAccessException: module java.base does not open java.nio to unnamed module @1817d444. I guess I need to downgrade to JDK 11. Java Platform, Standard Edition 11 Reference Impleme…
Tag: java-11
Correctly migrating from JDK-8 to JDK-11 for JAX-WS libraries
I am developing a couple of integrations (as Maven projects) between several defect management systems, one of which exposes services through WSDL, forcing me to consume them through WS. For the latter I succesfully developed the code for JDK-8 and everything works. I am now in the middle of JDK migration fro…
Combining / merging object members in a list
I got a list of objects from class A in a list. Some of these objects are equal in id and name but not in list <B> , and list b is ALWAYS different. I need to merge these so that my list is only made out of object a’s with same name and id exists and all the b
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…
Java SDK 11.0 or above is required when using .NET 6 or higher
I’ve installed .NET 6 (version 6.0.100-rc.1.21458.32) and Visual Studio 2020 Preview (although it might be not a prerequisite). I am trying to debug a hello-world application but I am getting a build error regarding Java. I’ve installed Java 17 setting Path as well as pointing to the Java Developm…
adoptopenjdk alpine vs alpine-slim in AdoptOpenJDK maintained images
In the AdoptOpenJDK maintained images docker hub repo i see that among others there are two builds for alpine namely alpine & alpine-slim. I downloaded both & see a good 81 MB difference in the image size (see below) between both. I tried using the alpine-slim image to build & up my services and d…
I want to get the value with round but not getting proper result
I want to get the result with round the value please see the attached image. What is wrong with it. The result should be : 18.59 I have used float instead of double. MRE: Observed output: 18.58 Answer The problem The problem is not in the rounding. The problem is in the value that you are rounding. You think …
Jackson conflicting setters, even with @JsonIgnore and @JsonProperty
I’m at a complete loss here. I have a class with overloaded setters for a property, and for the life of me cannot get Jackson to pick a correct setter. Stripping out the things not needed from the class, here’s the base of what I’ve got: I have tried every combination I can think of of @Json…
JDK11 getFreeSpace and getTotalSpace from File is not matching df
I am seeing df -h giving output like below But if I do the same from java like below It is printing like below Can someone let me know why is this discrepancy in disk utilization? Environment Ubuntu 18.04 Java – Zulu OpenJDK 11.0.11 Answer As I also mentioned in the comments, the primary reason is that …
How to print List of String array array using lambda in Java [closed]
Closed. This question needs debugging details. It is not currently accepting answers. Edit the question to include desired behavior, a specific problem or error, and the shortest code necessary to reproduce the problem. This will help others answer the question. Closed 1 year ago. Improve this question This i…