I am trying to lnclude an additional JDK (really JRE) to my eclipse project as i need to build against the IBM Java 5 JRE.
When I add the root folder of the jre it appears as if the core java class jars are not being added and only the jars in \lib\ext are being added. That is problem 1.
The next issues is I can't even manually add the jars by adding external jars to the runtime library. The reason being when I hit ok to save off the changes and then hit ok to the preferences dialog. The changes do not truly save. I open up the jre definition dialog again and only the jars in \lib\ext are there again.
Is this an eclipse bug? Is anybody finding similar results?
I'd really like to figure out where these preferences are stored so I can manually edit the file if need be.
As a side note, I have had a similar experience with not being able to save .pmd rule preferences and having to edit them manually in the backend. Though I suspect that bug is on the PMD developers.
Anyway any help on this is greatly appreciated.
Thanks.
Related
I generated several Java projects last spring. Today I opened Eclipse back up and selected the workspace I used in the spring but now all the projects have a red X on them. They all list the same problem:
**The project was not built since its build path is incomplete. Cannot find the class file for java.lang.Object. Fix the build path then try building this project.**
The build path looks ok (I think). I tried to create a new project as an experiment to see it there are differences. The new project dialog box has **Use default JRE (Currently jre7)** checked and a warning at the bottom:
**The current workspace uses a 1.4 JRE with compiler compliance level 1.7. This is not recommendes and either the JRE or the compiler level should be changed.**
Not sure what changed since last spring but something obviously has. I don't really understand what it is trying to tell me. ?Anybody have any ideas I would greatly appreciate it. Thanks.
Update: I created a new project and compared its buildpath to one of the projects from last spring. In the new project, it has: **JRE System Library [JRE7]**
In the old project that now has the problem I see: **JRE System Library [JAVASE-1.7](unbound)**.
Somehow I think the "unbound" means something bad. Still do not understand how it was ok last spring and now suddenly it isn't.
The "unbound" means that there is no JRE at the path specified in the classpath. My guess is that, since last spring, modifications were made to your java installation(s).
To bind your project back on a JRE, click on your "unbound" JRE and click on the "Edit..." button. In the Edit Library window, select a working JRE (JRE 7 would probably be a good choice in your case), then click on Finish. The "Unbound" message should disappear and your classpath should be okay afterwards.
After months of using Eclipse (latest Kepler release) on Ubuntu (13.10), after rebooting from to a sudden loss of power on my laptop, now Eclipse won't let me access java classes within their packages. It simply just shows the packages names but when I click on these the java classes are not showing.
Please note that even though I have several Maven projects working, this happens only on one specific project.
Steps so far:
1) I checked the permissions of all the java files and the directories.
2) Tried updating the project but no luck, also reverted back to my an earlier version (SVN) but didn't help either.
3) I tried deleting .eclipse and re-installing Eclipse and importing my projects, but unfortunately it didn't resolve the issue.
4) I have checked the .classpath file which seems ok.
5) Recursively 'touch' all the files, but still nothing.
I believe that this is a Maven + Eclipse related issue but I have ran out of options here, so I am open to suggestions. Thanks...
Probably it is not a problem of the project but of the workspace metadata. Please create a new workspace and important the project there. Are you able to browser the package explorer there?
Those are empty packages as you know. we need to right click on those packages and create class then you would probably see classes.
In case u still can't see classes then Go to Window->show view->Package explorer
you will be able to see packages along with classes tagged. if you have created any.
click here to see Image view of above settings
What is the advantage with not having a build path in eclipse? Why is that setting default when it's like something you'd never use? It seems eclipse indigo was developed to make software development as obscure as possible. I just checked out a fresh copy of the project I checked in (called dungeonworld) this afternoon from another computer and automatically nothing works, can't compile, can't choose build path, can't add jre, can't add jdk, can't add that to project properties.
Is my eclipse broken? I can't believe this is happening, such an easy thing not feasible.
Nothing above solutions worked for me so i tried below
Right click on project >> properties >> project facets >> click on java
It looks like you did not add Eclipse project metadata files to your source control system, so Eclipse doesn't know what your build path is or whether it is even a java project. You can see that the little folder on your dungeonworld project is missing the little 'j', which means Eclipse doesn't think it's a java project.
Go back to your other computer and look for the following files in your original project root...
.project
.classpath
.settings/*
Make sure all of the end up in your source control system or nothing will work right.
I have same problem, but i have solved
project right click -> properties -> java build path -> src/main/sources
all remove items on "Excluded", and then that item turn the status "(None)"
I tried below steps and it works for me.
Right click on project >> properties >> project facets >> click on java
Eclipse has a build path.
It's stored in a (by default hidden) .classpath file in your project.
You can also access it through the UI in project properties (right click on your project, properties, java build path).
Well, this is probably not your problem, but similar is happening if you are in Eclipse different perspective (for example for Python).
vs.
There where no entrys after right click on my projekt in Eclipse. How to click something, wenn build path entries are missing. So my Eclpise didn't detect my java project. I used following Maven command and after that I cleaned the project too. Now Projekt works as expected. So...
If you are using Maven, try mvn eclipse:eclipse in cmd console in your project directory! Make sure to use the path to your Maven folder for the command.
For example:
cd C:\yourEclipseProject\
C:\yourPathToMaven\apache-maven-2.2.1\bin\mvn eclipse:eclipse
This was helping me. After unsuccessful web research, a coworker told me this tip.
I just had a similar problem and I figured out that I had been choosing General Project instead of Java Project while creating a project. After I chose Java>Project it solved my problem. Maybe it'll solve yours as well.
After choosing that, eclipse automatically included java libraries as well.
It's not a good practice to commit IDE related files into source control. What if someone in team uses different IDE? It might have been only option at a time when OP asked this question.
New versions on eclipse (4.x) takes care of this automatically. Probably by observing what kind of source and build files you have in your project.
Don't know the reason. But this works for me, so posting it.
Right click on project -> 'Properties' -> 'Java Build Path'.
I had a problem with finding Java docs in Eclipse. I seem to have fixed the problem, but I'm posting this for two reasons: I would like to know why I had the problem in the first place and perhaps my method of fixing it might be useful to someone else having a similar problem.
I created a simple Java project in Eclipse (Helios on Windows 7) and selected the JavaSE-1.6 JRE. Then I created a source file and imported java.util.GregorianCalendar. When I hovered over GregorianCalendar, I was getting the message:
This element has no attached source and the Javadoc could not be found in the attached Javadoc
None of the methods of GregorianCalendar seemed to have any Javadoc, either. Other standard Java classes (even others in java.util, like ArrayList) didn't have this problem; only GregorianCalendar. Everything seemed set up properly in the project settings. The Javadoc location set in the Java Build Path was http://java.sun.com/javase/6/docs/api/.
I managed to restore correct behavior by temporarily switching to JavaSE-1.7 and then back. Evidently something got reset and all is well. While I'm happy that things are now working, I don't like being clueless as to how they got messed up in the first place.
Can anyone provide any insights into this?
I think general support relies on the presence of a src.zip in your JDK directory, which is detected when you autosearch a directory for Java installations. It could be missing. Not sure if online Javadocs are used.
I'm using Eclipse Juno on a Windows 7 64-bit (with a 32-bit JDK) but i think it will also apply to your Eclipse version:
Download JDK docs zip file to your Desktop folder;
Right-click on the file, choose Properties and unblock it;
Move the file to a location of your choice. I normally move it to the JDK folder;
Open Eclipse and go to Window->Preferences->Java->Installed JREs;
Select your JDK installation and press Edit;
Select the rt.jar file and click "Javadoc Location..." button;
Select the "Javadoc in archive" radio button;
Set the archive path by browsing to the JDK docs zip file;
Set the "Path within archive" to "docs/api" (without the quotes).
Enjoy! ;)
I have a web app built with Maven.
Most of the time, I built the application using Intellij IDEA, but now I want to import the application in Eclipse to see something in this IDE.
After mvn eclipse:eclipse, I add in Eclipse the app, but when I try to add the app to the server (tomcat), I receive:
There are no resources that can be added or removed from the server
Solutions?
You need the project to have a Eclipse Dynamic Web Module facet. You can try doing this via the project properties dialog and looking at project facets, then clicking the appropriate check box. This may not be available however, so you may need to do the next thing.
Create a backup of your project and follow the directions at dzone.com. This'll allow you to modify the project facets via your eclipse .project file.
Keep in mind, once you add those facets, you cannot change them back via Eclipse. Definitely make sure you have a backup before starting.
This step worked for me:
Right-Click on the Project Name, then
Maven-->Update Project..
Click OK
After doing this I was able to see my project in Add/Remove Programs.
As mentioned somewhere else adding Eclipse WTP didn't do any good, however I performed the above step after I had already added Eclipse WTP, so I am guessing that may not be needed.
This was done for Eclipse Juno.
Hope this helps someone.
Edited: You can follow this link as above mentioned I think might have needed WTP and that add a lot of other things into the workspace.
http://blog.teamextension.com/maven-as-eclipse-dynamic-web-module-556
Check whether Maven Integration for Eclipse WTP is installed. If not, install it from Eclipse Marketplace
After installation restart Eclipse
Right click your project and Maven--> update project configuration
Delete tomcat and re create tomcat (clean tomcat,add your project,publish and enjoy)
I've got Tomcat 6, Java 1.6, and was trying to get it to work in Eclipse Juno Service Release 1's "internal server" (whatever that's called.) Here's what I did that worked for me:
(Found these instructions at http://www.mkyong.com/eclipse/eclipse-ide-tomcat-version-6-0-only-supports-j2ee-1-2-1-3-1-4-and-java-ee-5-web-modules/)
I should point out that I followed ClutchDude's instructions to make my project a Dynamic Web Module facet. It didn't work on its own for me, but maybe it was part of making it work in the end.
Using Eclipse (or other text editor), open the file
.settings/org.eclipse.wst.common.project.facet.core.xml
Find the line that reads
<installed facet="jst.web" version="3.0"/>
3.0 is for Tomcat 7.x (so says mkyong.) Change it to 2.5 (or 2.4).
I restarted Eclipse and it worked for my project.
The reason why this is happening is because eclipse by default looks for the deployment descriptor in the folder {project.home}/Webcontent/WEB-INF/web.xml where as the Maven puts them in src/main/webapp/WEB-INF/web.xml.
So when you are trying to add your project onto the server eclipse cannot find a deployment descriptor and hence you get the annoying message.
This can be solved by adding the following entries in .settings/org.eclipse.wst.common which can be found in
Project home folder in your workspace if it is a new maven project.
The folder where you already imported from if you are using Import -> Maven projects.
Make the following changes in to the org.eclipse.wst.common
wb-resource deploy-path="/" source-path="/src/main/webapp"/. Add this entry.
Edit --> property name="java-output-path"
Please check the following link from more details. http://java.dzone.com/articles/webapps-eclipse-and-maven.
The comments section has an excellent example with a working project.
This issue was fixed for me my installing additional eclipse modules. in particular, the ones related to m2e-wtp. just do a search for m2e in the plugins search listing for your version of eclipse
If you face an error like "There are no resources that can be added or removed from the server",
then
1) Go to the META_INF of your websvcsEAR and go to the application.xml.
2) Goto modules-> clickDetails and add the module that is existing. i.e., some EAR which your project demands.
3) Click ok
4) Now go to your server -> right click -> add and remove -> add your EAR.
Maybe you don't need add your application to the server's configuration. I think that you must use m2e eclipse plugin in order to launch the app.
For example, in your eclipse you will see a contextual menu called "Run as" if you right-click on your pom file. You can clicking on "Maven build" and Maven will download all the information needed to start tomcat.
I hope this helps you.
I used
mvn eclipse:eclipse -Dwtpversion=2.0
in command line in the folder where I had my pom.xml. Then I refreshed the project in eclipse IDE. After that I was able to add my project.
I was able to resolve this by removing my EAR project from my Eclipse workspace, then re-importing it.
Well, with a Spring and maven project, i got it that way:
Eclipse Version: 2019-06 (4.12.0)
Java 1.8
Tomcat 7
Yes, go to Project Properties >> Facets >> select Dynamic Web Module but dont apply yet!!!
Right under, it should appear a link Further Configuration Available. Click on it, otherwise one will have to edit .settings/org.eclipse.wst.common.component manually. Update source directory to src/main/java. (source)
Then in Facets window check Java - mine was pointing to 11 even though i don't have Java 11 installed or configured like a JRE runtime. I could only add/remove when changed to 1.8. (source). Note: That was really the problem, why don't Eclipse get this configuration automatically from the project?
Finally Eclipse creates some directories like WEB-INF and META-INF, just delete them.