I have jre8 installed and set as the default for the jre but under compiler compliance I can't find 1.8 and under execution environment I can't find javaSE 1.8. I'm using the latest build of Eclipse EE.
I took a look at this manual
http://help.eclipse.org/luna/index.jsp?topic=%2Forg.eclipse.jdt.doc.user%2Ftasks%2Ftask-add_new_jre.htm
But I couldn't find any .ee files in my jre8 or JDK1.8 installation directories.
Open Preferences and look in 'Java > Installed JREs'. If you don't have a Java 8 shown there click 'Add...' to add it. Close the preferences.
Open Preferences again and look in 'Java > Installed JREs > Execution Environments', select 'JavaSE-1.8' and make sure your Java 1.8 is checked as the Compatible JRE
If the eclipse version is old as #mike stated in his answer then you would be unable to view the JavaSE-1.8 on the Execution Environments list in your eclipse; You can do the following to use it even on older versions:
Help --> Install New Software
Place the following URL --> http://download.eclipse.org/eclipse/updates/4.3-P-builds/
Install the plugins and restart eclipse.
Now if you have JDK 1.8 on your computer and added it as an installed JRE you'd be able to view and use JavaSE-1.8
Or just download and use the latest eclipse
Older versions of Eclipse might not work with javaSE-1.8
You need to find out what version of Eclipse you have by going into its help menu and clicking on About Eclipse.
If your version is older than the one at https://www.eclipse.org/downloads/
then you need to uninstall your older version and install the latest version.
I had the same problem with my Eclipse on Linux Mint. And the only way I could solve it was by following above instructions.
Related
I have downloaded the new eclipse 2022-06 and I wanted to know that what version of Java does it run on. What is the JDK and JRE and how can I create a project to run on Java 7 with a compatible JRE? Where do I select those settings or what do I additionally need to download?
Take a look at the official documentation: Eclipse/Installation
You will find for each version of Eclipse the required JRE/JDK to run it.
Instead, if you are looking for how to run a project with a different JRE/JDK, you can take a look at this guide: How to Change Java Version in an Eclipse Project
I am new with programing and i wanted to install netbeans in my macbook but i kept having this text " The JDK is missing and is required to run some NetBeans modules Please use the --jdkhome command line option to specify a JDK installation or see http://wiki.netbeans.org/FaqRunningOnJre for more information.”
That means you need the Java Development Kit (JDK). It is important for running files and develop those. You can download the newest version of the JDK under: https://www.oracle.com/java/technologies/javase-downloads.html
If you already have a JDK installed you must change the config file of NetBeans.
I have installed the TestNG 6.9.9 Eclipse plugin.
My project java compiler setting is set to 8.0.65.
If I execute an Test with TestNG i got following error:
"VM version 1.6.0 is invalid, Java 1.7 or above is required for running TestNG."
I can change the JRE in the "Run Configurations" for the executed test but it is stuck with 1.6 How do I change this ?
A Java 8.0 Version is installed on the system, but it looks like, that the plugin use the JRE configuration from my project.
TestNG usually takes the Project Execution environment JRE. If you've changed the JRE from 1.6.x to 1.7 or 1.8 then it should work. Just to make sure the steps,
1) Open the Test file
2) Go to Run configurations
3) open JRE tab
4) click on Alternate JRE and select JDK/JRE > 1.6
I removed JRE System Library v6 and added current version (v8 in my case) via "Add Library"
I had a similar problem and deleted all of the 1.6 JREs from my Eclipse preferences. You can still build 1.6 projects under a 1.7/1.8 JRE, so 1.6 probably isn't needed.
I have both Net-beans and eclipse IDEs installed in my laptop, But there is a per-devolved system that want lower version of JDK. so I installed net-beans older version too. but then JDK does not support my eclipse version. can I use two JDK in once?? and what should I do for working in both IDE in different versions.
Eclipse / Net beans need JRE to run in first place. If the version of JRE you install is not supported by the version of Eclipse/Netbeans u have, then you have to get a compatible version of Eclipse/Netbeans that match your installed JRE. (Alternatively you can change the JRE version)
Now coming to JDK. You need JDK only to compile you code inside Eclipse/Netbeans. You can have any number of JDKs installed and you can configure 'per project'.
In Eclipse, this is how you configure the JDK for the project
Java Build Path -> Libraries -> Add Libraries -> JRE System Library
In the next screen you add the desired JDK from your system , by locating it in the file browser.
P.S : Havent used Netbeans, but sure it is supported
I went through and uninstalled all Java from my computer. Then I installed JavaSE JDK1.7. I then modified Eclipse configuration so it would start and opened it up. I have an Ant script to build my project and I want to build my project against 1.7, but whenever I run the script, it says
'Launching PROJECT build.xml' has encountered a problem.
Specified VM install not found: type Standard VM, name jdk1.6.0_21
The installed JRE in Eclipse is 1.7 and nothing else. I cannot for the life of me find how to change what Ant is looking for.
This is because you still have the old JDK configured as JRE in the External Tools Configuration" in eclipse - open it via the arrow menu next to this button in the toolbar: , then change it to the Java 7 JDK.
In Eclipse, click the ant file -- Run As -- External Tools Configuration and click on the JRE tab.
Select "Run in the same JRE as the workspace"
Delete the "C:\Users\%USERNAME%\workspace.metadata.plugins\org.eclipse.debug.core.launches\%PROJECT_NAME% build.xml.launch file"
That solved problem for me.