With eclipse I get the following error when I execute an ant task with Java 1.8.
"JRE version less than 11 is not supported."
My "external tool configuration" is configured with "Seperate JRE" Eclipse Adoptium jdk-8.0.352.8-hotspot
Anybody knows how to prevent this restriction?
Eclipse IDE for Enterprise Java and Web Developers (includes Incubating components)
Version: 2022-12 (4.26.0)
Build id: 20221201-1913
Related
After I updated 'Vaadin Plug-in for Eclipse' from version 4.1.6 to version 4.1.7 (and Vaadin Designer from 4.6.18 to 4.6.20) something broke.
I started to get constant error when oppened Vaadin design (LitTamplate) java file:
An internal error occurred during: "Requesting Java AST from selection".
'boolean com.ibm.icu.text.UTF16.isSurrogate(char)'
This error does not happen when using Eclipse 2022-12 with Vaadin Plug-in 4.1.7 and Vaadin Designer 4.6.20.
But there is other issues there:
https://github.com/vaadin/designer/issues/2443
I was using Eclipse 2021-12 with 'Vaadin Plug-in for Eclipse' 4.1.6 and 'Vaadin Designer' 4.6.18 before update. Now I can not install old versions back into the Eclipse.
Vaadin plugin guide will always offer only the latest version.
https://vaadin.com/eclipse
It would be nice to have version links for installing older versions.
Something like this:
https://vaadin.com/eclipse/2021-12/plugin/4.1.6/designer/4.6.18
Used equinox.launcher_1.5.600.v20191014-2022 to install Eclipse IDE for Java Developers 2019-12 then invoked Eclipse and used Eclipse Marketplace to install Kotlin Plugin for Eclipse 0.8.19. I created a Kotlin project. Using Package Explorer I expanded the contents of JRE System Library.
I expected to see java.util.ArrayList be listed in order to use on
kotlin-stdlib / kotlin.collections / ArrayList . Is there some other step missing?
That listing is showing the 'modules' in the JRE. Modules were introduced in Java 9.
The 'java.util' package is in the 'java.base' module as show in this screen shot:
I want to learn the source code of netty, and I import the source code of netty from github, I use maven to import these code but there are some pom errors here when I import the project:
I searched the Internet but I can't get any useful information.So I have nothing to do but to ask for help.
ps,
I attempt to follow the steps here:
and the solution is :
Set up Eclipse with M2E and Java 7/8
Ensure to use the 64-bit version of Eclipse.
Download os-maven-plugin and put it into /plugins (Eclipse 4.5) or /dropins (Eclipse 4.6) directory to work around the problem where m2e does not evaluate an extension specified in our pom.xml. (Unlike its name, it's both a Maven plugin and an Eclipse plugin.)
Import the project via the 'File → Import... → Existing Maven Projects' menu.
Netty project Maven pom.xml settings dictate use of Java SE 1.6, while implicitly using Java 7/8 (1.7/1.8) features if present. This may result in compilation errors in Eclipse. There are two ways to work around this problem:
Look in the 'Window → Preferences → Installed JRE' menu:
Make sure you have Java 7/8 installation available under 'Installed JRE'
Map this Java 7/8 installation onto Java 6: 'Installed JRE → Execution Environments → Java SE 1.6'
Alternatively, Java 7/8 JRE can be selected on per-project basis for each Netty module.
I follow these steps but I cant't solve this problem.
could you please help me to solve this problem? I look forward to your help.
my OS information:
ProductName: Mac OS X
ProductVersion: 10.13.3
BuildVersion: 17D102
my jdk information:
java version "1.8.0_131"
Java(TM) SE Runtime Environment (build 1.8.0_131-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.131-b11, mixed mode)
my eclipse information:
my maven information:
Apache Maven 3.5.0 (ff8f5e7444045639af65f6095c62210b5713f426; 2017-04-04T03:39:06+08:00)
Maven home: /Users/mingxing/development/tools/apache-maven-3.5.0
Java version: 1.8.0_131, vendor: Oracle Corporation
Java home: /Library/Java/JavaVirtualMachines/jdk1.8.0_131.jdk/Contents/Home/jre
Default locale: zh_CN, platform encoding: UTF-8
OS name: "mac os x", version: "10.13.3", arch: "x86_64", family: "mac"
I have a problem using Eclipse as IDE for the reactive-stocks-java8 template coming with typesafe-activator-1.2.10
Here are my steps:
Install Eclipse Luna on my Mac.
Default JRE is 1.6, but I have the oracle JDK in /Library/Java/JavaVirtualMachines/jdk1.8.0_25.jdk/Contents/Home/ after installing with the standard method. I add this JRE to the alternate JRE of eclipse
Install activator
I've downloaded typesafe-activator-1.2.10.zip, unzip it in a folder, add it to the path to have activator in the command line.
Create the project
$activator new
> reactive-stocks-java8
$cd reactive-stocks-java8/
$java -version
java version "1.8.0_25"
Java(TM) SE Runtime Environment (build 1.8.0_25-b17)
Java HotSpot(TM) 64-Bit Server VM (build 25.25-b02, mixed mode)
$activator
[reactive-stocks-java8] $eclipse with-source=true
In eclipse
I import the project in the standard way (Import / Existing Project into Workspace)
in the java build path, The JRE is the 1.6. I change it to 1.8.0_25
I also have to change the java compiler
In my package explorer or the Problems view, no compilation error, great. Now I click on app/controller/Application.java to open it in the editor. In the editor, I've got some unresolved:
views.html.index cannot be resolved to a type
The type scala.collection.Seq cannot be resolved. It is indirectly referenced from required .class files
What am I missing?
here are the answers from the community
https://groups.google.com/forum/#!topic/play-framework/v6ep7DmfH18
Trying to find the ScalaTest plugin for use with Eclipse Luna and Scala IDE for Eclipse 4.0.0 (aka Lithium). Currently using Milestone 2 of the Scala IDE for Eclipse Lithium plugin.
The ScalaTest plugin used to be part of the Scala IDE for Eclipse plugin (appeared on the list and you could check the box it to install--Scala IDE for Eclipse is supposed to be an ecosystem of plugins, ScalaTest being one of them). It doesn't appear to be there any more.
It's not on the list,
When I check "Installation Details" it doesn't appear either, and
Test configurations don't appear under "Run As..."
But there is mention of Luna in the ScalaTest plugin Github site for the scalatest plugin (https://github.com/scalatest/scalatest-eclipse-plugin), which is supposed to be part of the Scala IDE for Eclipse ecosystem.
The tests run fine from the SBT command line. So I know the ScalaTest jar file is in the classpath and is of a compatible version for my project. The ScalaTest jar file appears as an external jar file in my project in Eclipse, and the tests compile in Eclipse. Other Scala IDE for Eclipse functions seem to work correctly.
System Configuration:
Eclipse Version: Luna (4.4.0),
Scala IDE for Eclipse Version: Lithium 4.0.0 Milestone 2, for Luna and Scala 2.11.1 (download site http://download.scala-ide.org/sdk/lithium/e44/scala211/dev/site)
Java Version: Java 1.8_05,
Scala Version: 2.11.1,
Build Tool: SBT 0.13.5, running under Java 1.8_05,
ScalaTest Version: scalatest_2.11-2.2.0.jar (copied into the lib directory of my project)
My Eclipse project file is generated by SBT using the eclipse SBT command, and loaded into Eclipse using the standard "Import->Existing Projects Into Workspace..." method. The build.sbt file is a single line reading scalaVersion := "2.11.1".
Is there a ScalaTest plugin for Eclipse Luna and Scala IDE for Eclipse 4.0 (Lithium)? If so, where do I go about finding it?
This is a version of the Scala IDE that works with Eclipse Luna (version 4.4).
http://download.scala-ide.org/sdk/lithium/e44/scala211/dev/site