I encounter this problem as below:
"Eclipse is running under 0, butthis Java project has a 1.8 Java compliance level, so WindowBuilder will not be able to load classesfrom this project. Use a lower level of Java for the project, or run Eclipse using a newer Javaversion. "
I tried several ways but it did not work. I installed both java 17 and java 1.8 and changed the jre to 1.8 & the complier to 1.8. In the end, it still did not work.
The eclipse version I am using is 2018. I need it to start the SWING application and now I am into troubles.
Can you give me some suggestions? Thanks in advance!
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
"Eclipse is running under 0, but this Java project has a 10 Java compliance level, so Window Builder will not be able to load classes from this project. Use a lower level of Java for the project, or run Eclipse using a newer Java version."
What do they mean by under 0 ?!
And how can I fix this?
I just read How to have Eclipse use JDK8 to compile a project?
What i added jdk8 to eclipse as,
From the answers of How to have Eclipse use JDK8 to compile a project?
I tried to Update the JDT/Core, JDT/UI bundles from http://dist.springsource.com/snapshot/TOOLS/java8/e43
But it shows error as,
"Eclipse Java Development Tools Patch for Java 8 Support (BETA)" is not applicable to the current configuration and will not be installed.
"Eclipse Plug-in Development Environment Patch for Java 8 Support (BETA)" is not applicable to the current configuration and will not be installed.
How Can i fix it ?
I can say that Java 1.8 does in fact work with Eclipse Luna ( the beta version released around March 17, 2014) or later. I tried it and it was good.
Also, I noticed that in the Eclipse Marketplace, there are now plugins to install functionality into Kepler to support JDK1.8. I haven't tried the plugin myself though.
This is a old topic but I just wanted to point out that I have searched enough to find that Indigo version can't be updated to S.E 1.8 here the link which is given on eclipse website to update the Execution Environment but if you try it will throw error for Indigo.
Here is the link where the Information about execution environment is given.
This shows the step by step to update Execution environment.
I have tried to update Execution environment and I got the same error.
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
When I click on the design tab I get this error:
Incompatible Java Versions
Eclipse is running under 1.7, but this Java project has a 1.8 Java compliance level, so WindowBuilder will not be able to load classes from this project. Use a lower level of Java for the project, or run Eclipse using a newer Java version.
I've checked in window>preferences that:
>java>compiler is set to 1.8
>java>installed JREs has a 1.8 JDK as the default
Have I missed something?
looks like JAVA_HOME is set to the java 7 one, will this require a restart?
You're actually executing eclipse with Java 7, you can update JAVA_HOME to point to Java 8, and then restart eclipse (not your computer).