I have just installed WindowBuilder for Eclipse and java 1.7 JDK, but when I create a new JFrame in Eclipse, and try to open the "design-view" in WindowBuilder I get the following error: "Eclipse is running under 1.6, but the Java project has a 1.7 Java compliance level, so WindowBuilder will not be able to load classes from the project. Use a lower level of Java for the project, or run Eclipse using a newer Java version."
How to Resolve Incompatible Java version Error in Eclipse in mac?
You might have installed the Java 1.7 SDK but it looks like Eclipse is started with the older one (1.6).
The WindowBuilder is integrated into Eclipse and will use the same Java instance as Eclipse (that is the 1.6 version).
However your project will use Java 7. The WindowBuilder (Java 6) will be unable to load classes from the higher version which your project uses (Java 7).
What you need to do is:
Configure your eclipse to start with the newer (Java 7) version. This can be done in the Eclipse.ini file.
Which Eclipse you're running?
You definitely need to upgrade your Eclipse to a newer x64 Version to use Java 1.7.0
Related
I try to create a Maven project with Eclipse Oxygen EE using JDK 1.8.0 u301 but when i click finish give this
error.
I don't understand how to solve it because I'm not using JDK 9.
I checked if I had more JDK installed but found nothing.
As suggested by #khmarbaise I downloaded the last version of Eclipse EE:
Eclipse JEE 2022-03-R-win32-x86_64
I suppose it was something related to eclipse version and maven version.
I used the same JDK and JRE for both version.
*Due to some project requirements I "have" to use eclipse 4.18 (2020-12) which uses Java 11 by default and is mandatory to start.
But my entire project is/was written in Java 1.7 earlier. Now , in my mac i have both java 1.8 and 11 installed also my eclipse settings are such shown below.
I have made sure removed all java 11 references in my eclipse and made the project and workspace configure to take the 1.8 jdk and run at 1.7 compiler level.*
but when i run ,project -->clean-->build, i run into the JaxB missing in java 11 ( in java 11 JAXB was removed and my project uses jaxB extensively) This is known.
So i am wondering what am i missing that my projects are still building my project with java 11 and not java 1.7 (using jdk 1.8 configured).
Please help.. stuck on this since some days.
machome
Eclipse Compiler setting-1
Eclipse Setting Execution Envs
Eclipse installed JRE's
Eclipse Project specific setting
Java 11 JaxB error
If Eclipse itself is being run with Java 11, and you have a plug-in installed that has not been properly update to work under Java 11, as it appears, you will need an updated version of that plug-in. Update to the latest "oracle design studio", and if you still see this problem, contact Oracle support.
The latest Eclipse may require Java 11 to run, but it's simple to set up Eclipse projects that use older Java versions. Don't mess with the Java version it uses to start up, as long as that is a proper Java 11 version.
As one commenter mentions, you'll have to have a particular Java distribution configured in "Installed JREs->Execution Environments", and then you'll have to have the project configured to use that Java version symbol, like "JavaSE-1.7".
OpenJML is available as Eclipse Plugin (install site http://jmlspecs.sourceforge.net/openjml-updatesite ) and it seems to get installed OK in Eclipse Photon.
But docs say it shall run only on OpenJDK 1.8 and it cannot be any other JDK (say, Oracle JDK). Also it cannot be (OpenJDK) version different than 1.8 (say 1.9).
My Projects in Eclipse all use (Oracle) JDK, besides soon we plan upgrading from JDK 1.8 to 1.9.
Can I setup OpenJML so that it uses its wanted OpenJDK 1.8, while my project uses whatever it needs?
OpenJML builds upon the OpenJDK 1.8 Compiler internally.
Of course, you can run OpenJML (with JRE 1.8) and the Java 9 compiler against the same Java sources (outside of eclipse; in a build tool), but OpenJML won't understand new language features (Modules, etc.) or API changes. So you need to stick with Java 1.8 API and features, hence besides of JVM improvements, you don't get any benefit of using Java 9.
I am working on an existing Java web project. I am getting lots of syntax errors in the files. It shows it needs JDK version 1.5. I have Eclipse Luna (4.4.1), which doesn't support JDK 1.5. How can I find out which version of Eclipse is compatible with JDK 1.5?
You can go to Preferences -> Java -> Installed JRE and add a new java VM which is Java 1.5.
Also, for your project, go to Project's properties -> java compiler. Check the checkbox to enable project specific setting and set the compliance level to java 1.5
I have installed java JDK 7 in my osx. It is installed in /Library/Java/JavaVirtualMachines/ where are 1.6 java version is installed in /System/Library/Java/JavaVirtualMachines. Which is fine in my case, since I only want to use JDK 7 inside intelliJ ide to run javafx. So I added in intelliJ project structure the 1.7 SDK, but none of my import javafx.* work. How can it be ? How can I check that 1.7 SDK is can be resolved by my ide
Specify JDK to be Java 7 in the project settings.
For example: