"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?
Related
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!
I started a new project that is just a hello world that has the Commons IO v2.4 Apache Library that uses JDK 1.6 but is unable to run after I build the jar. I added it to the Libraries and Modules just fine, and it executes the methods that I took from the libraries fine on Compile time, but I am using JRE 1.7. I took of the methods to prove that it is just the fact that it is interacting with this library. I did nothing else to this new project.
The JDK for the library is 1.6 but is demanding 1.8 JRE. Is there somethign that I'm missing here? I want to let users run my jar with their minimum JRE being 1.6 so I can target more users, but this is throwign an error.
The actual Error that is being thrown is the major.min error of 52.0, which means that it needs to run it at 1.8 JRE to run a simple hello world.
Try manually selecting language level for your project.
Right click project > Open Module Settings:
On right side under sources tab, change language level to required JDK.
Then click on Project tab on left and make sure both JDK version and language version are at correct version.
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).
I decided to give Eclipse (Eclipse 3.7.2 ) a chance because of the plugin "Columns For Eclipse". The IDE I would like to migrate away from ( Visual Slickedit ) has spoiled me with sophisticated column editing features and this plugin has most of them, whereas the default column editing features in Eclipse are too basic for me.
I tried the plugin out at home and I really like it. However, the machine I use at work runs on Java 1.5 and the plugin requires Java 1.6.
I would like to try recompiling the plugin under Java 1.5, as my job uses WebLogic 9.2 which runs on Java 1.5. I don't want to risk compatibility issues by setting up my computer to run on Java 1.6
I have the source code, but it didn't come with directions on how to compile the plugin. It isn't structured in a Maven project.
I'm 100% new to Eclipse so I was wondering if someone could give me step by step instructions for compiling (and installing ) my own copy of the plugin under Java 1.5.
Alternately, is it possible to set up Eclipse 3.7.2 to run on Java 1.6 but always compile in Java 1.5?
Thanks much in advance.
Building and installing the plugin without an existing build script would be quite complicated. For your second option, you can setup the compiler compliance level for the entire IDE:
Or alternatively, you could set it up on a project-by-project bases (Right click project, Properties->Java Compiler).
Yes, it is possible to run Eclipse with Java 6, but use a Java 5 JDK as the default for compilation and runtime. You need to configure Eclipse: Window -> Preferences -> Java -> Installed JREs.
You can also use Java 6 as the development/runtime and set the compiler compliance level to 1.5 (same as 5), but that's a bit dangerous as it doesn't stop you using APIs only available in Java 6; it only enforces language syntax.
I am trying to config my eclipse (Helios) use jdk 7 to compile my code. I didn't install jdk 7 on my Windows XP. But I include all of the jdk contents with my project. It seems the solution provided in this post doesn't work. Compile java code needs JDK. the JRE is enough for running the compiled code. I think we need a way to configure the JDK to be used not just JRE. I tested with a JDK 7 new feature, String in switch, I can compile it in my batch file compile system but cannot use eclipse to compile it.
any idea?
This is what I did to make Eclipse 3.x works with Java 7.
install Java 7 in another machine and then copy the JDK folder into my java application 3rdparty directory (so my machine still use Java 6);
download the Eclipse 3.7.1 from here: eclipse 3.7.1
configure Eclipse by following steps in this post (select 1.7 in Compiler compliance level under the Java Compiler entry);
At least I can use String in Switch now in Eclipse.
Good luck.
Compile java code needs JDK. the JRE is enough for running the
compiled code.
that is right
"But I include all of the jdk contents with my project"
Including those will not change eclipse's compiler behavior. Including files under project build path just makes those classes available for your application development/run-time (or as good as setting CLASSPATH)
Do these :
1 - Install required version of JDK
2 - Choose following menu - Window > Preferences > Java > Compiler - and you will see a drop down to choose the version you want to use.
3 - Read this and this as well.
Good luck for being DBA after 5 yrs. Please consider working on your English as well (no offense please)