java-12

问题 I am using IntelliJ, Gradle, AdoptOpenJDK 12 and OpenJFX for my project. I am trying creating a simple HelloWorld kind of program to get started with OpenJFX. My project runs fine with OracleJDK but the moment I switch to AdoptOpenJDK 12 and run the project I get the following error in the console: Caused by: java.lang.RuntimeException: Error initializing QuantumRenderer: no suitable pipeline found Caused by: java.lang.RuntimeException: No toolkit found I have tried switching to IBM JDK and

问题 While playing with some jcstress code, I noticed two parameters that are very new to me: StressLCM and StressGCM . The very first thing to do for me was searching for these in the source code itself and while I have found some things, it is still unclear what they actually do. I was really hoping to see some comments in the source code that would shed some light, but no luck. I also found the bug description where these have been added, but the explanation made no sense for me: Randomize

问题 Configuring Jenkins (2.121.3) to use JDK 12 in the Global Tool Configuration->JDK installations... menu using "Download URL for binary archive" produces the following error when performing a build: The JAVA_HOME environment variable is not defined correctly This environment variable is needed to run this program NB: JAVA_HOME should point to a JDK not a JRE Build step 'Invoke top-level Maven targets' marked build as failure Finished: FAILURE How can I resolve this issue? 回答1: The tar file has

问题 I am unable to import org.w3c.dom.NodeList package to Eclipse. It is showing The package org.w3c.dom is accessible from more than one module: <unnamed> , java.xml" error message in eclipse. Please let me know how to fix this ? Eclipse Version: Eclipse IDE for Enterprise Java Developers. Version: 2019-06 (4.12.0) Build id: 20190614-1200 Java version: java version "12.0.1" 2019-04-16 Java(TM) SE Runtime Environment (build 12.0.1+12) Java HotSpot(TM) 64-Bit Server VM (build 12.0.1+12, mixed mode

问题 I want to install OpenJDK Java on Mac OSX and have it work alongside other JDK's since it is a newer release. Currently, I downloaded the tar.gz and placed it in my path but that is hard to maintain. The only other install I found that do more things automatically is the install via Homebrew cask. It looks like only the current version too: brew cask info java Shows: java: 13,33:5b8a42f3905b406298b72d750b6919f6 https://openjdk.java.net/ So I can install it from there, but then what? Am I

问题 I made a JavaFX Application, and its GUI has these four following things: A TextField , called name (takes in the username) A PasswordField , called password (takes in the password) A ToggleGroup , called gender (there's a method related to this ToggleGroup (male,female,other)) A TextField , called locationField (takes in the location name) There is a sign up button at the bottom that takes all the data and saves it into the MySQL database Here's the method related to the ToggleGroup public

问题 I made a JavaFX Application, and its GUI has these four following things: A TextField , called name (takes in the username) A PasswordField , called password (takes in the password) A ToggleGroup , called gender (there's a method related to this ToggleGroup (male,female,other)) A TextField , called locationField (takes in the location name) There is a sign up button at the bottom that takes all the data and saves it into the MySQL database Here's the method related to the ToggleGroup public

问题 I keep fighting to understand what VarHandle::setOpaque and VarHandle::getOpaque are really doing. It has not been easy so far - there are some things I think I get (but will not present them in the question itself, not to muddy the waters), but overall this is miss-leading at best for me. The documentation: Returns the value of a variable, accessed in program order... Well in my understanding if I have: int xx = x; // read x int yy = y; // read y These reads can be re-ordered. On the other

问题 List<Object> al = Arrays.asList("ABC", "XYZ"); This code works fine in Java11 but when I try this in Java12, it gives an error. Any hint of what I am missing? Thanks for the help. minimal code as asked: import java.util.Arrays; import java.util.List; public class TestFile { public static void main(String str[]){ List<Object> al = Arrays.asList("ABC", "XYZ"); } Erro log: Error:(58, 42) java: incompatible types:java.util.List<java.lang.String> cannot be converted to java.util.List<java.lang

问题 List<Object> al = Arrays.asList("ABC", "XYZ"); This code works fine in Java11 but when I try this in Java12, it gives an error. Any hint of what I am missing? Thanks for the help. minimal code as asked: import java.util.Arrays; import java.util.List; public class TestFile { public static void main(String str[]){ List<Object> al = Arrays.asList("ABC", "XYZ"); } Erro log: Error:(58, 42) java: incompatible types:java.util.List<java.lang.String> cannot be converted to java.util.List<java.lang