Eclipse build path entry is missing

Hello, I have just installed Eclipse 3.3 on Ubuntu. When I click on File...New...Java Project, and name my project, the project appears on the left with a small red box indicating an error. The two errors indicated are:
"The project cannot be built until build path errors are resolved"
"Unbound classpath container: "Default System Library in project "Test""
When I right click on the project and on properties, there is another error:
"Build path entry is missing: org.eclipse.jdt.launching.JRE_CONTAINER"
I tried to click on "Properties..."add library", and add the JRE system library, but when I click next the window does not move to the next screen. Anyone know how I can create a new project without these errors. Thanks.

Do you have any JRE libraries configured? I think Eclipse detects one by default.
You could try posting this on a Eclipse forum where you are likely to get a better response sooner.

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Missing class in eclipse build path

Eclipse Platform
Version: 3.3.2
Build id: M20080221-1800
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Steve

For anyone who finds this post with the same problem, the answers are the following:
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You were right!!!
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Because in this release the JACOB code is in an external Jar file and not incorporated into frmwebutil.jar, it needs to be downloaded. To do this, change the WebUtilArchive setting to read: webUtilArchive=/forms/webutil/frmwebutil.jar,/forms/webutil/jacob.jar
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I'm working on a team project for the first time ever, which is a little scary. We are using Subclipse. As soon as I downloaded the project, I noticed that I don't get any error warnings. Soon after, I noticed that Ctrl H fails to search the project.
I thought this was all Subclipse's fault, and tried a clumsy workaround by copying the project. I had noticed that the package icon doesn't appear for the folders holding the source files and realized this is the problem. I guess Eclipse doesn't know which files are the source files. I would have thought it could tell because they end in .java, but that shows how little I know.
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codinatrix wrote:
I'm working on a team project for the first time ever, which is a little scary. We are using Subclipse. As soon as I downloaded the project, I noticed that I don't get any error warnings. Soon after, I noticed that Ctrl H fails to search the project.
I thought this was all Subclipse's fault, and tried a clumsy workaround by copying the project. I had noticed that the package icon doesn't appear for the folders holding the source files and realized this is the problem. I guess Eclipse doesn't know which files are the source files. I would have thought it could tell because they end in .java, but that shows how little I know.
After wrestling with this for hours, I figured out that I could use Build Path -> Use as source folder. For a split second, I thought I had finally solved the problem. But then all of a sudden tons of error messages showed up in every file. It turns out that when you use Build path -> Use as source folder, it moves your source folder and changes the names of the subfolders. So how on earth do I just tell Eclipse where my source files are without it moving everything around and screwing up the whole project?
Please, somebody tell me what is going on before I pull all of my hair completely out.I have encountered similar issues with Eclipse and--though I'm not an expert--I have used Eclipse a lot.
Can you tell us more about your project folder structure (as it exists in SVN)?
Generally speaking, here's what I would do when start a new Eclipse project from SVN using Subclipse:
1) Delete your current project and start clean.
2) Open the SVN Repositories view in Eclipse
3) Right-click the folder you are checking out as your project (for example, if your project is called ProjectFoobar and contains a trunk, right-click the trunk folder... don't check out all of the branches--use svn switch instead) and do a Checkout.
4) Select 'Check out as a project in the workspace
5) Give it a project name.
6) 'Check out HEAD revision' (presumably)
7) Depth: fully recursive
8) Next
9) Workspace location: make sure this the workspace you intend to create the project in
8) Finish
Hope that helps.
-Thok
Edited by: Thok on Apr 29, 2009 7:07 PM

Build path contains duplicate entry

Hi
We are unable to remove the duplicate entry of the jar file in the java build path in Open Script 9.1.Can any one you please let me know how to remove the duplicate entry in the build path.
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Edited by: SivaThota on Jul 27, 2010 12:55 AM

Hi
We are unable to remove the duplicate entry of the jar file in the java build path in Open Script 9.1.Can any one you please let me know how to remove the duplicate entry in the build path.
Thanks in Advance
Shiva
Edited by: SivaThota on Jul 27, 2010 12:55 AM

Eclipse compile and build path

Hi I'm using Eclipse to build a web application.
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where your web application is deployed? i.e. from where tomcat takes your web.xml, classes, jars, html's and jsp's?

Import exisiting Maven (multi module) project: Build path missing & maven dependencies not resol

Hi,
I recently upgraded to the new Eclipse Mars release (and also tried the STS 3.7.0 release). But I'm having trouble with m2e.
I filed the following bugreport for it:
https:// bugs.eclipse.org/bugs/show_bug.cgi?id=471576
See also this screenshot, which illustrates the problem:
http:// imgur.com/Y5ymWvA
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Thanks,
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Please do not use the maven-eclipse-plugin (mvn.eclipse:eclipse) and m2e simultaneously, they're not very compatible. Instead, when issues happen, clean your project in the m2e way, using the "Maven > Update configuration" context menus on your project(s).

The name ("common name") of a valid code-signing certificate in a keychain within your keychain path. A missing or invalid certificate will cause a build error. [CODE_SIGN_IDENTITY]

The name ("common name") of a valid code-signing certificate in a keychain within your keychain path. A missing or invalid certificate will cause a build error. [CODE_SIGN_IDENTITY]

If you could ask a coherent question, maybe...
Perhaps you should be posting in the developers forums...

Java build path as appose to j2ee depenencies ?

if i understand right j2ee depen. basicly means one is in another's build path and has to be deployed under the same war ?
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Unbound classpath variable: 'JRE_LIB_CORE' in project 'RFT'
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I tried removing these entries from Project Properties -> Java Build Path -> Libraries, and as a replacement, added JRE System Library. When I save these settings, the errors do not go away. And when I check project properties again, all my changes have been reverted back - the variables I had removed are back.
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Best I can suggest is that that is entirely an eclispe problem.
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i'm connected to a NWDI and imported a development configuration with a SC from there.
When I create a new DC (type: Web Dynpro) within this SC, I receive a lot of errors that classes could not be resolved.
In the projects properties, I can see that the Java Build Path has "JRE_LIB" added only. In local WD-projects (without any NWDI) there are a lot more Libraries added.
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WEB DYNPRO APPLICATIONS 7.00
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still the same...
additional information: after cretaing the DC, I also receive the following warning/error:
Development Component Creation completed with some problems.
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after copy&paste the missing entries from a .classpath-file of a local project to my NWDI-based projects .classpath file, the build errors are gone.
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How do I add a jar file into the build path of the compiler?

Hey,
I'm trying to import a jar file into the build path of the compilation process, but it does not find the packages or the classes that are in it.
I think I don't add it right...
 ArrayList<String> options=new ArrayList<String>();
 options.add("-d");
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 public void setTargetDirectory(String targetDirectory) {
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 options.add(targetDirectory);
 String classPath="-cp ";// tried this also with "-classpath"
 for (String str : includeDirectory)
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Edited by: Adam-Z. on Feb 24, 2010 5:41 AM
Edited by: Adam-Z. on Feb 24, 2010 5:42 AM

Thank you for your reply,
Q: Are there .class files in that directory in that jar file? (the compiler doesn't ( can't )) look for directories, it can just look for specific files , and scan to get a list of all files matching certain criteria. So if there are no class files, it will say the package doesn't exist, even if there is a directory, possibly containing other files.yes there are class files in the jar, the tree structure:
j2MeDataChunkGenerator_Plugin\(lots of class files)
META-INF\manifest.mf
and thats it.
, your code will only work on windows because other platforms use a different path separator. You should use java.io.File.pathSeparator not explicit ';" when building your classpath. (this is unrelated to your problem, but you should correct it)will do, thanks.
Q: Is that error in your post formatted by your own diagnostics? (we could possibly help you better if we didn't have to guess!!)I would not post my own error code, this text is generated by the compiler diagnostic.
{code}
 System.err.println(" Error details: " + diagnostic.getMessage(null));
{code}
Q: Is line 3 of ImageCroper_Editor.java (sic) an import statement? (we could possibly help you better if we didn't have to guess!!)it is an import error... didn't the error message stated that it is an import problem? wired, I'm sure before it did. anyway it is an import error.
Also you don't show us what the variable includeDirectory is in terms of type, and contents, that might be helpful. (we could possibly help you better if we didn't have to guess!!)It has only one String object: "D:\%Important Documents\WorkSpaces\PacMan\ApplicationManager\Plug-in\Data Chunk Designer.jar"
the last file on the classpath list.
Q: Have you proven this? that i did post, in this long line of text.
Q: Is the compiler finding other classes (in other packages) in that same jar file?No. all the class files are in the jar, they all have entries that start with "j2MeDataChunkGenerator_Plugin\*.class", and since I get 47 errors I guess it does not load any other class.
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Thanks,
Adam.

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Fixed: In Project prefs: Flex Build path: added the similar swc folder called "local" from FB 4.6 eclipse/plugins directory and removed the 4.7 one.
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Cycle was detected in the build path of project

Hi
I was trying to create a Test application for MDB.
Here from the webContent I call the service locator in the EJB folder and get the bean object. Using the object I need to put a message in the MQ.
The onMessage method<present under EJB folder> picks up the message<which is a key> and then it has to refer the value in the Map which is under the ../WebContent/Javasource/..
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How do I solve this ?? Please help ?

The fix for this - regardless of IDE - is to use a
bit of common sense, and good old-fashioned logic
(remember that?). You've obviously got (at least) 2
things that are dependent on each other, which - if
you remember the Chicken and Egg problem* - can't
possibly work. Work it out for yourself, you're
writing software, after all. If A needs B to do some
work but can't because B needs A first, you've got
problems
* sensible "it was the egg. Something
not-quite-like-a-chicken-but-close mated with
something-else-not-quite-like-a-chicken, and produced
an egg that eventually hatched into a chicken"
notwithstandingOK georgemc, I allowed you to motivate me to look for a better fix. I think I came up with a solution but I'd like to see if you, or anyone else, agrees with it.
First let me say that I'm using a persistence layer, which I've never done before, and with cardinality annotations different classes need to reference each other cyclically.
My problem was that I had class A in project 1 that depended on class B in project 2, but class B (project 2) also depended on class A (project 1). This meant that I had project 2 on the project 1 build path and vice versa; which is why I was getting the error.
After your post I started to think about it and it seems that my original solution didn't do a very good job of utilizing the extensibility that Java's OO gives us. My new solution is to remove any reference of class A that is in class B and also remove project 1 from the project 2 build path. Then extend class B into class ChildOf_B in project 1 and insert the references to class A in the new child class. I of course keep project 2 on the project 1 build path.
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Thanks,
§

google search:
http://p2p.wrox.com/topic.asp?TOPIC_ID=4606
I had the same problem, so I can help you on that.
You need to include 2 jar files into a class path for the wsadmin.
1) in C:\Program Files\WebSphere\AppServer\bin there is a file called setupCmdLine.bat
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SET WAS_CLASSPATH=%WAS_HOME%/properties;%WAS_HOME%/lib/bootstrap.jar;%WAS_HOME%/lib/j2ee.jar;%WAS_HOME%/lib/lmproxy.jar;C:/Program Files/WebSphere/AppServer/java/jre/lib/ext/mail.jar;C:/Program Files/WebSphere/AppServer/java/jre/lib/ext/log.jar
so that includes the MAIL.JAR and LOG.JAR.
Dunno if this is same as your problem or not.

Eclipse build path entry is missing

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