java-14

问题 I am trying to have a pom.xml file with PMD plugin integrated into build stage. PMD version 3.13.0 Oracle JDK 14 <?xml version="1.0" encoding="UTF-8"?> <project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>group</groupId> <artifactId>artifact</artifactId> <version>1.0-SNAPSHOT</version> <packaging>jar

问题 I am trying to see if I can replace my existing Pojos with the new Record classes in Java 14. But unable to do so. Getting following error: com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of com.a.a.Post (no Creators, like default construct, exist): cannot deserialize from Object value (no delegate- or property-based Creator) I get that the error is saying the record has no constructors, but from what I see the record class takes care of it in the

问题 I am trying to see if I can replace my existing Pojos with the new Record classes in Java 14. But unable to do so. Getting following error: com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of com.a.a.Post (no Creators, like default construct, exist): cannot deserialize from Object value (no delegate- or property-based Creator) I get that the error is saying the record has no constructors, but from what I see the record class takes care of it in the

问题 I am trying to see if I can replace my existing Pojos with the new Record classes in Java 14. But unable to do so. Getting following error: com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of com.a.a.Post (no Creators, like default construct, exist): cannot deserialize from Object value (no delegate- or property-based Creator) I get that the error is saying the record has no constructors, but from what I see the record class takes care of it in the

问题 I have been working with the following class named City @ToString @AllArgsConstructor public class City { Integer id; String name; } and tried to convert it to a record called CityRecord as record CityRecord(Integer id, String name) {} // much cleaner! But moving to such a representation, one of our unit tests starts failing. The tests internally deal with a list of cities read from a JSON file and mapped to an object further counting the cities while grouping them under into a Map .

问题 Java 14 introduced records feature. Record creates getter with the same name as field, so one would write print(person.name()) for example. But old Java bean convention dictates that one should name this method as getName() . Using both styles in the same code base does not look very nice. Migrating everything to records is not possible, as they are too limited to replace all use-cases. Is there any official or semi-official guidelines how to name getters and setters after Java 14 in new code

问题 Java 14 introduced records feature. Record creates getter with the same name as field, so one would write print(person.name()) for example. But old Java bean convention dictates that one should name this method as getName() . Using both styles in the same code base does not look very nice. Migrating everything to records is not possible, as they are too limited to replace all use-cases. Is there any official or semi-official guidelines how to name getters and setters after Java 14 in new code

问题 I use Java 14 with Jetty 9.4 and Weld-servlet-shaded-3.1 and I get this exception: Caused by: java.lang.reflect.InaccessibleObjectException: Unable to make protected final java.lang.Class java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) throws java.lang.ClassFormatError accessible: module java.base does not "opens java.lang" to module weld.servlet.shaded. According to answer here: https://stackoverflow.com/a/41265267/5057736 I tried to add --add-opens java.base/java.lang=ALL

问题 I'm trying to install netbeans with Java 14. I'm getting below error - > sudo ./Apache-NetBeans-11.3-bin-linux-x64.sh --javahome /home/raj/.sdkman/candidates/java/current Configuring the installer... Searching for JVM on the system... Unsupported JVM version at /home/raj/.sdkman/candidates/java/current. Try to specify another JVM location using parameter --javahome Below are my java details - > which java /home/raj/.sdkman/candidates/java/current/bin/java > java --version openjdk 14 2020-03

问题 Just trying a hands-on the java.lang.Record. I have gone through the documentation and the JEP-359 for some understanding. So upon reading about the implicit declaration of the constructor I thought of mixing it up with an existing code generation library - Lombok! Now what I've ended up creating as a minimal reproducible example is this record import lombok.AllArgsConstructor; @AllArgsConstructor public record Java(String version) { } which when compiled using IntelliJ successfully produces