Unbound classpath container in Eclipse

Question

I have checked out a project using Subversive for Eclipse and I am getting the following errors    The project cannot be built until build path errors are resolved Unbound classpath container   JRE System Library jdk1 5 0 08     I m assuming the first error will be resolved as soon as the second one is   I think I need to install JDK 1 5 0 08 and set it as a jre system library for the project but I can t find anywhere to download it - the closest I can get is JDK 1 5 0 22   If anyone could provide an alternative solution  or a download link for jdk1 5 0 08 I suppose  I would appreciate it

User · Answer

This is pretty old question and I recently came across this. Also answers says make sure that you have the correct JDK registered in Installed JRE section of Eclipse properties, and that is it. I had the correct JDK registered and that was marked as default, but still I got this error. There is one more missing piece.

Make sure the in the Installed JREs section the name of your target runtime environment is exactly as it is mentioned in your imported project. For example if the error you get is - Unbound classpath container: 'JRE System Library [JavaSE-1.8]'. Then in Installed JREs you need to have JDK 1.8 registered and its name should be the exact value mentioned in square brackets, which in this case is JavaSE-1.8.

User · Answer

right click on the project folder go to Properties at bottom go to Java Build path click on Libraries tab  select Classpath click Add Add Library button on right  select JRE System Library and click Next and then Finish click Apply and Close the error should go away in IDE

User · Answer

Indeed this problem is to be fixed under Preferences -  Java -  Installed JREs  If the desired JRE is apparent in the list - just select it  and that s it   Otherwise it has to be installed on your computer first so you could add it with  Add  -  Standard VM -  Directory  in the pop-up browser window choose its path - something like  program files Java Jre   -   ok   And now you can select it from the list

User · Answer

Click on the error message displaying  Unbound classpath container   JRE System Library jdk1 5 0 08    left click anyd choose quick fix  Under quick  list of possible options will get displated  Choose replace library  Choose the library you installed  Your good to go

User · Answer

In an already configured workspace where it just stopped building   1  Right click the error 2  Select quick fix 3  Use workspace default JRE   This occasionally happens to me when working in a shared project after updating it with the latest changes  I m not sure why  maybe their JRE installation path differs slightly from mine somehow

User · Answer

To fix this    Right click your project      Build Path     Configure Build Path Select JRE Library and click Edit and from Edit library window choose alternate JRE whatever been configured with your eclipse then click Finish

User · Answer

I had the same problem even after installing JDK 1 7  I corrected it by adding the bin directory to my PATH  So I went to      computer properties advanced environment variables   and then added      C  Program Files Java jdk1 7 0 55 bin     then I followed these instructions  http   clean-clouds com 2012 12 06 how-to-install-and-add-jre7-in-eclipse

User · Answer

For those using sdkman  this helped me   Use Case  I was using identifier 8 0 202-amzn I decided to install Azul Zulu as follows  sdk install java 13 0 2-zulu  Error  And then i got this unbound error   Solution  1  Right-click on your project in Eclipse STS 2  Choose Build Path   Configure Build Path    3  Under Libraries  remove the JRE Library  for my case 8 0 202-amzn 4  Under Libraries  click on Modulepath   Add Library    5  Choose JRE System Library  click Next 6  Choose Alternate JRE  click on Installed JREs    7  Your previous configured value should be there 8  If it is there  edit it  if it is not there  add one 9  Make sure the name is  13 0 2-zulu 10  And the location JRE home  is   Users jumping monkey  sdkman candidates java current 11  Click Apply and close 12  Click Finish 13  Voila   You will see JRE System Library  13 0 2-zulu  in your Project Explorer and all errors gone   Bravo

User · Answer

The problem happens when you        Import project folders into the eclipse workspace  when projects use different Jre     Update or Reinstall eclipse   Change Jre or Build related Settings    Or by there is a configuration mismatch         You get two errors for each misconfigured files         The project cannot be built until build path errors are resolved    Unbound classpath container   JRE System Library         If the no  of projects having problem is few         Select each project and apply Quick fix Ctrl 1    Either Replace the project s JRE with default JRE or Specify Alternate JRE  or JDK           You can do the same by right-click project-- Properties from context menu -- Java Build Path-- Libraries-- select current unbound library -- Remove-- Add Libraries-- Jre System library-- select default or alternate Jre       Or directly choose Build Path-- Add libraries in project s context menu      But the best way to get rid of such problem when you have many projects is   EITHER        Open the current workspace  in which your project is  in File Explorer    Delete all org eclipse jdt core prefs file present in  settings folder of your imported projects  Be careful while deleting  Don t delete any files or folders inside  metadata folder       Now Select the  classpath files of projects  those with errors  and open them in a powerful text editor such as Notepad       Find the line similar to    lt classpathentry kind  con  path  org eclipse jdt launching JRE CONTAINER org eclipse jdt internal debug ui launcher StandardVMType JavaSE-1 6   gt    and replace it with    lt classpathentry kind  con  path  org eclipse jdt launching JRE CONTAINER   gt    Save all the files  And Refresh or restart Eclipse IDE    All the problems are gone       OR     Get the JRE used by the projects and install on your computer and then specify it

User · Answer

I got the Similar issue while importing the project   The issue is you select  Use an execution environment JRE  and which is lower then the libraries used in the projects being imported   There are two ways to resolve this issue   1 While first time importing the project   in JRE tab select  USE project specific JRE  instead of  Use an execution environment JRE     2 Delete the Project from your work space and import again  This time   select  Check out as a project in the workspace  instead of  Check out as a project configured using the new Project Wizard

User · Answer

Given the FAQ  sharing a project file seems have to have advantages and is even recommended practice for Java projects  personally  I would not do that    Maybe some of the following work for you    Edit the project s properties  right-click project  Properties  Java Build Path  Libraries  Remove and Add Library  Import the project s files without the  project file  Install JDK1 5 from http   java sun com javase downloads index jdk5 jsp and see whether you can fix paths

User · Answer

I had a similar problem when I recreated my workspace that was fixed in the following way   Go to Eclipse -  Preferences  under Java select  Installed JREs  and check one of the boxes to specify a default JRE  Click OK and then go back to your project s properties  Go to the  Java Build Path  section and choose the  Libraries  tab  Remove the unbound System Default library  then click the  Add Library  button  Select  JRE System Library  and you should be good to go

[eclipse] Unbound classpath container in Eclipse

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