I imported Java project from SVN and want to run it without changing the classpath. I installed JDK 8 (java -version shows
Java(TM) SE Runtime Environment (build 1.8.0_121-b13)
), but on the project I see error:
Unbound classpath container: 'JRE System Library [JavaSE-1.8]' in project
I also added "Standard VM" in Window -> Preferences -> Java -> Installer JREs, but it didn't help.
I guess I have to set my system JRE exactly to JRE which is set in the project. But as far as I understand, it's the save version...
You can provide project specific JDK/JRE by right clicking on project and then select configure properties. There you can update java compiler.
Look in the Preferences in 'Java > Installed JREs > Execution Environments'.
Click on 'JavaSE-1.8' and select the JRE to be used.
You can select it on run configuration. Then, click on your run option, and then select JRE overlap.
this example is for eclipse
Related
I've just installed Java EE Eclipse Mars, with a JDK 8u45 x64 and JDK 7u79 x64 JDKs. My eclipse.ini file is pointing the -vm option to my Java 8 JDK Home: C:\ambiente_mars\jdk8u45x64\bin\javaw.exe.
When I started Eclipse and was configuring my environment I started to set my Installed JREs like this (and like I've done since Indigo):
My Compiler Settings are configured this way:
After all this, I went to Execution Environments to choose the right VM for all the environments, but my configured JRE's are not there:
Actually, this JRE is not shown for any of the Execution Enviroments <= JSE 1.7. This very same screen, but now on Luna shows everything right, so I think I'm not doing anything wrong.
Maybe this is a bug? Can someone point another way to do it?
Thanks a lot in advance, lads!
Edit 1: Eclipse is x64 too. Thought it would be good to remember ;)
Try this: click "Search.." on item "Installed JREs". Choose your java folder.
Default is: c:\Program Files\Java\
I had this problem while looking into issues with an Eclipse (Neon .1) installation yesterday.
After trying plenty of different things, we spotted that the machine had both the environment variable "JRE_HOME" set to a JRE that wasn't the one running eclipse, and a _JAVA_OPTS (global java settings override) environment variable set. When we took both of these out, the execution environments finally started being found!
Unfortunately, we removed both at once, so I can't say which of the two it was, but it's another thing you could try changing.
First , you have correclty added the JDK(JRE) in your Eclipse , but the execusion environement changes from a project to an other and in the same workspace , that means , you have to right click on your project => Build Path => Configure Build Path => Libraries Tab you will find JRE System library [JDK...] => you click on and you click on Edit button then you can select the installed JDK in your machine.
Also in eclise.ini for eclipse or jbdevstudio.ini for Jboss developper Studio you set the full path of you installed JDK as a default vm
This is an example :
-vm
C:/Program Files (x86)/Java/jdk1.7.0_51/bin/javaw.exe
About the JAVA_HOME you can modify if by making you default JDK.
Hop that is useful for you.
Click on windows → preferences → java → Installed jres
Check jdk with version available or not
If available just tick the jdk checkbox and then goto execution environment and select javaSE version and then Compatible jre section add jdk
If not available click on add → select standard VM → in place of jre home add jdk bin folder path and click on apply → tick on jdk
then goto Execution environments and select javaSE version and then Compatible jre section add jdk
Hello I have an project in Eclipse and I need change my JRE version in this progect to JRE 1.7 from JRE 1.8.
How can I do it?
In the Preferences go to 'Java > Installed JREs' and add the Java 8 JRE/JDK if it is not already there.
In the Properties for the project look at 'Java Build Path'. On the 'Libraries' tab edit the JRE entry and select Java 8.
You may also want to set the Java Compiler preferences for the project (or the global preferences) to specify Java 8 compliance.
Note: You need to be running Eclipse Luna (4.4) or later for full Java 8 support.
Windows > Preferences > Java > Installed JREs
For some reason, whenever I create a new Java project, I can't compile anything and I get the following errors:
The project cannot be built until build path errors are resolved
Unbound classpath container: 'JRE System Library[OSGi/Minimum-1.2]' in project 'MyProject'
This didn't use to ever happen, and it used to be very easy to create new Java projects.
Open Properties by Right clicking on your project
Select Java Build Path
Under the Libraries, select JRE System Library under the Libraries.
Then click Edit...
select Alternate JRE under System library
If any, select JRE from the drop down and click finish
If none, click installed JREs...
Under installed JRE Types, select Standard VM, and click next.
Set your JRE home and JRE name and click finish.
Under the install JREs select your newly added JRE and click OK
After that, Repeat step 6.
1.Check whether JRE is properly installed in your system and it is added in Eclipse.
You can try re-installing JDK in your system and
Add JRE to Eclipse from Window -> Preferences -> Java -> Installed JREs.
I have 3 versions of Java installed on my system: 6, 7, and 8... I am required to have JRE6 available for a product my company develops, so I cannot get rid of it... But despite copying my Eclipse install to a new folder for another project I need to work on and removing JRE6 from this version alltogether, I still cannot get it to work.
How can I get the google plugin for Eclipse to work in my scenario?
If you have created a shortcut to start eclipse, you can add a parameter to tell it to use the jre of your choice like this -
C:\eclipse\eclipse.exe -vm "C:\Programs\jdk\jdk1.7.0_55\bin\javaw.exe"
I have used "javaw" executable from a jdk installation, but you may point to the same executable within a JRE installation as well.
This will resolve the error.
Keep in mind that there is a separation between the JVM that Eclipse itself is running in and the various JREs that you can configure in Eclipse to run your programs/applications. You need to specify to Eclipse what JVM you want it to run under, using eclipse.ini.
That's separate from the Installed JREs configuration you show in your screen shot above.
Add Java 7.0 to Eclipse if you haven't: Window -> Preferences -> Java -> Installed JREs.
Next add Java 7.0 library to your project: Right click on project -> Properties -> Java Build Path -> Libraries tab -> Remove JRE 1.6 and add New Library (JRE System Library, 1.7.0).
Last set Java 7.0 compliance level: Right click on project -> Preferences -> Java Compiler -> Compiler compliance level: 1.7
Also since you can use different Java to run applications, you also have to change this in the Run configuration which you use to start AppEngine related tasks.
I need to write a project that's only compatible with Java 1.5. I have Java 1.6 installed. Is there some form of backwards compatibility to get Eclipse to compile with 1.5?
Do I have to install Java 1.5 to get it to show here? Or maybe there is another way?
.
Click on the Add Library button. It brings your screen to point to the Java location.
Select "Directory", button right besides JRE home and point to the installed folder location.
Even though you want to just 1.5 compiler project, you can achieve it by changing compiler settings in Eclipse instead of removing 1.6 JRE and add 1.5 JRE.
GOTO -->JAVA--Compiler---> and change compiler level to `1.5` instead of `1.6`
As davidfmatheson suggested,
Just be careful, especially if you're setting this up for a team of people to work on. If anyone uses anything that is new or changed in 1.6, it will compile, but not run in an environment with JRE 1.5.
Click on the Window tab in Eclipse, go to Preferences and when that window comes up, go to Java → Installed JREs → Execution Environment and choose JavaSE-1.5. You then have to go to Compiler and set the Compiler compliance level.
Right click project -> Properties -> Java Build Path -> select JRE System Library click Edit and select JDK or JRE after then click Java Compiler and select Compiler compliance level to 1.8
If you are using maven build tool then add the below properties to it and doing a maven update will solve the problem
<properties>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
In the preferences section under Java -> Installed JREs click the Add button and navigate to the 1.5 JDK home folder. Then check that one in the list and it will become the default for all projects:
Eclipse - specific Project change JDK Version -
If you want to change any jdk version of A specific project than you have to click ---> Project --> JRE System Library --> Properties ---> Inside Classpath Container (JRE System Library) change the Execution Environment to which ever version you want e.g. 1.7 or 1.8.
The JDK (JAVA_HOME) used to launch Eclipse is not necessarily the one used to compiled your project.
To see what JRE you can select for your project, check the preferences:
General → Java Installed JRE
By default, if you have not added any JRE, the only one declared will be the one used to launched Eclipse (which can be defined in your eclipse.ini).
You can add any other JRE you want, including one compatible with your project.
After that, you will need to check in your project properties (or in the general preferences) what JRE is used, with what compliance level:
(source: standartux.fr)
See the page Set Up JDK in Eclipse. From the add button you can add a different version of the JDK...
As I was facing this issue minutes ago, in case you are trying to open an existing project in an environment with a newer JDK, make sure you pdate the JDK version in Project Properties -> Project Facets -> Java.