I haven't started my Eclipse Java EE Kepler in a while, and now it ended up with the following error on every project in my workspace:
http://i62.tinypic.com/30rsfgm.png
I'm not sure what happened here.
Due to a recent Java update, the JRE settings for the projects in Eclipse got unbound.
To fix this, one must set the current JRE on their computer as the JRE for the project library on the build path (This can also be found by going to the Problems tab, right clicking the error "unbound classpath container", then press Quick Fix):
http://i62.tinypic.com/5a438i.png
Then click on the JRE System Library, edit, and set it as an Installed JRE:
http://i58.tinypic.com/14vntqp.png
Related
When I try to run my Java program in Eclipse I get the following error:
"An internal error occurred during: "Launching ConvertExcelToJSON".
Cannot invoke "org.eclipse.jdt.launching.IVMInstall.getLibraryLocations()" because "install" is null"
I have never seen the error before, the program has run with no problem before. Yesterday I got updates to my work machine and maybe that caused something to give me this error.
Anyone seen this before and perhaps have a solution to it?
It happened after I changed my Installed JREs configuration. Eclipse's default bundled JRE 16 was selected, but my project was set to Java 8 everywhere in project configurations.
Following fixed my case:
Go to Run > Run Configurations then go to JRE tab and update the project JRE according to new configuration. So that JRE version in eclipse matches the project requirements.
In my case, there was a difference in project's execution environment and installed JDK.
I changed it from Right Click on Project -> Build Path -> Configure Build Path -> Libraries -> JRE System Libraries -> Select same version as installed JDK and it worked.
While trying to do a maven compile goal on a jar project in eclipse it failed stating that there was no java compiler found. It showed that it was using the path to jre1.8.0_45. My configured java build path in eclipse is using jdk1.7.0_80 and is configured for the correct corresponding environment.
I tried to rename the jre directory while eclipse was open but it showed that something had a lock on it, and sure enough it was eclipse that was launching with jre1.8. If I renamed the jre1.8 directory while eclipse was closed, then it would not launch again complaining that it cant find the java directory.
I guess what I'm getting at here is, is this a bug with Mars? Or am I missing something because everything in Eclipse is pointed to 1.7.
Thanks,
Nate
You should point Eclipse to JDK installation.
Window -> Preferences -> Java\Installed JREs
click Add -> Select Standard VM, Next ->
and then in text box "JRE home" you should put path to JDK home,
it's quite misleading..
BTW you should specify java version in maven-compiler-plugin. M2E plugin will then recognize this settings and configure compiler appropriatelly
http://www.gamefromscratch.com/post/2011/11/15/Telling-Eclipse-to-use-the-JDK-instead-of-JRE.aspx
It's the launch configuration of any m2e build that should point to a full JDK, cf. http://help.eclipse.org/mars/topic/org.eclipse.jdt.doc.user/tasks/task-choose_config_jre.htm?cp=1_3_5_2 (except you will be using a Maven Build configuration, rather than a Java Application).
For most other situations using a JRE should be perfectly fine.
Alright so basically, I'm trying to run Eclipse with JavaFX, but then it gives me this error:
You are not running your eclipse instance with Java7 or Java8. The JavaFX tooling is disabled because of this.Make Java7/8 the default system java or adjust your eclipse.ini to pass -vm pointing to your Java7/8 install.
In case you want to turn off this check open your preferences and go to General > Startup and Shutdown and uncheck 'JavaFX Tooling Java Check'
Now I know it isn't pointing to the right SDK, but I have no idea how to change it, since I'm kind of new to this this stuff. I've already downloaded JDK 7.40 as well. I'm also using Ubuntu on a virtual machine, if that even matters anyway. Can anyone help me, I'd appreciate it.
Pre-requirements:
Install Java™ 8.
Install Kepler SR2 (4.3.2) .
The Kepler is still not supporting Java8. What to do?
Open Eclipse
Help > Install New Software…
Enter the following URL into the ‘Work with’ field:
http://download.eclipse.org/eclipse/updates/4.3-P-builds/
Press ‘Enter’
Select category ‘Eclipse Java 8 Support (for Kepler SR2)’
Click ‘Next’
Click ‘Next’
Accept Licence Agreement
Click ‘Finish’
Now jre8 is correctly located.
Now configure JavaFx
Open Eclipse
Help > Install New Software…
Enter the following URL into the ‘Work with’ field:
http://download.eclipse.org/efxclipse/updates-released/0.9.0/site
Press ‘Enter’
Select category ‘Eclipse Java 8 Support (for Kepler SR2)’
Click ‘Next’
Click ‘Next’
Accept Licence Agreement
Click ‘Finish’
It looks like the default java on your system is not java7. What do you get when opening a shell and execute java -version? Solution is to:
A) make java7 the default java
B) start eclipse with -vm
Apparently, you have installed 32bit Eclipse and 64bit JRE/JDK on a 64bit OS. Please use 64bit Eclipse and the problem will be solved. Please make sure JAVA_HOME And JRE_HOME is present in environment variables.
I had the same issue. I tried re-installing Eclipse, but it wouldn't work. I had to completely remove the project and delete all the project files. After that, I re-started eclipse and created the project again. However, this time I made sure the project path included the Java FX library as shown in the screen shot.
Java Build Path
I did this while I was creating the project and then I was able to create the project without any issues. Give this a try.
I wanted to start learning java but Eclipse is giving me some trouble.
First of all I'm a beginner with Java with little to no knowledge about it. I want to use 'JavaSe-1.7'. I have no clear reason to use it besides using the latest version. After downloading Eclipse (Eclipse IDE for Java Developers) I created a new Java project and selected 'use an execution eviorment JRE : JavaSE-1.7'. This directly popped the notification saying 'The default compiler compliance level for the current workspace is 1.6. The new project will use a project specific compiler compliance level of 1.7.'. I finished creating the project and started following some tutorials.
However I noticed directly I have 2 errors which dont explain anything or have a source. I ignored it and started typing and tried to import 'java.io.console' however it said 'The import java.io cannot be resolved' and I have no idea what is the cause of it neither how to fix this.
Would like some instructions into the right direction.
Thanks in advance
Check your Eclipse preferences: Java -> Installed JREs. The one that you're using should be marked and it should be a JDK not just a JRE.
Also check your project's build path: Right click on the project -> Properties -> Java Build Path
Check in the "libraries" folder whether the JRE System Library is present and if not add it using "Add library"->"JRE System Library" and then select the correct one (from an installed JDK).
You may not have your JDK/JRE set up correctly.
Check the following:
Did you install a JDK or just the JSE? The JDK is needed to compile .java files to .class files. Without it, you can only run java programs, not develop them. If not, download and install it from Oracle website.
Check in Eclipse, if you have the JRE installed there as well. You just need to specify the path to the installation. You can reach this screen via the "Window->Prefrences" menu. see this screenshot:
The message you receive about project specific compiler compliance level is not a problem, it just means that your workspace is set up to comply to java 1.6 but your project will comply to java 1.7 standards. Also, Java 7 in general is no problem whatsoever.
Paths may differ, especially if you're not running a *nix OS. Just point the location to where you installed your JDK.
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.