I have been using eclipse to learn how to program Java and one day when I tried to use Eclipse it would not open. I get the purple window with a loading bar but when that gets about half way it crashes but does not give me any report as to why it crashed. How could I fix Eclipse or how could I save my projects so that I can reinstall Eclipse?
Your projects are already saved in your hard disk. You just need to reinstall, and when you open again to give the specific path to your projects.
Your projects (Eclipse workspace folder) are saved on your hard-drive . It has nothing to do with your Eclipse crash. If the folder is located inside Eclipse folder, just copy it to some other location. If it is already outside, you are safe.
If you re-install Eclipse, just use this copied workspace as your Eclipse workspace, it should just work fine.
Note: It would be easy to fix existing Eclipse, given you provide exact error message.
be cool , you can get your projects without any problem
1) go to eclipse.org ("https://eclipse.org/downloads/") and download eclipse and re-install then it will bind with your existing workspace in eclipse then you can open your projects through eclipse
2)eclipse default workspace is" C:\Users\yourname\workspace " manualy go to this link in here replace "yourname" with your PC name and get your projects
I have eclipse and the ADT bundle correctly installed on my home PC, and tried to install it on my laptop so I can work on my projects on the go. However, I either didn't set the java paths correctly, or installed them in the wrong place, because I can't get a default project to load without errors.
I have correctly:
-Installed the ADT bundle and launched eclipse without errors
-Created a workspace
-Correctly Installed both the jre8 and jdk1.8.0_05 in the location C:\Program Files\Java
I am very new to Android development, and I feel like I was lucky to set up the Java dependencies correctly on my home PC, no such luck this time from what the error look like...
However, when I try to make a basic "Hello world" project, I immediately get the following error:
The container 'Android Dependencies' references non existing library 'C:\Users\userName\workspace\appcompat_v7_3\bin\appcompat_v7_3.jar'
I have tried adding the library, by checking build configurations, but I don't understand fully whats going on to correctly solve the problem. Here is my workspace:
And lastly, I tried checking the build configurations to see that the libraries are, in fact, missing. Or something like that. I am not sure if I should just try to reinstall java and the jdk.
Build configuration:
Anyway, I'm not sure what I deleted, misplaced, uninstalled, or didn't install, but if anyone could point me to a solution I would be very grateful. If anyone has any other questions on my setup I will try and be as thorough as possible. Thank you!
In my experience I have had issues like this if not running eclipse as Administrator. Make sure that you aren't being blocked here.
EDIT: Please note Chris Stratton's concers regarding running an IDE as Administrator, as seen in the comments below.
EDIT 2: In my more recent experience, I have noticed that if I installed the SDK by copying and pasting the contents of the downloaded, compressed, folder to a destination rather than extracting it first, I would be required to run as Administrator. If this is the case, delete the SDK that you copied out of the compressed folder and simply extract the contents of the downloaded compressed folder. I am running Windows 7 so it is likely that this applies to all Windows 7 and 8 OS's.
In another case, I have also seen issues like this if the JRE is installed second rather than first. In this case, a reinstall of the SDK is probably all that is required.
There is a vague thing going on.
I downloaded a java project with all the libraries it uses. I set it up in netbeans. Now if I make any change in the GUI, it doesn't get reflected. But if I make a jar file of the project by clean and build option, and run it through the command prompt, the changes get reflected.
I have never faced this problem before ! What could be the reason for this ? The same thing happens if use the eclipse IDE.(The changes aren't reflected)
What happens is that, the default project always runs. The project that I downloaded.It doesn't include my modification.
Note : The build automatically option is already enabled for both netbeans and eclipse
Faced long back
It means the project not building automatically.
Checking that build automatically option,resolves the problem.
Maybe it's this:
In Eclipse: Take a look at the run-config and the classpath-configuration. There are several ways to include code in the classpath.
One is to include a jar that has been build somewhere else, maybe by maven, or as an external library. That is added with the Buttons "add JARS" or "add external JARS". These jars are not built by eclipse.
And there is a way to include code from an internal eclipse Project. That is done with the button "add Project". This is the code that is built by eclipse.
Maybe your GUI-code has been added to the classpath as a JAR and not as a Project. Try to add your GUI-Sources as a eclipse-project to the classpath.
Greetings
Do you execute Eclipse and NetBeans as Administrator? Try to do so and re-build the project.
Other option is to check file permissions.
I have a Spring Maven based project, its running fine. I just updated my svn from directly right click > Update. Now I have new files in my folder but in intelliJ IDE its still showing the old files.
How can I refresh my project in intelliJ so it have the latest files from folder.
I am using intelliJ 12 ultimate edition.
You can do Synchronize from the project window, but you shouldn't need to. I would check the old copies are not in a different place to where you expect. Try using the (><) button in the project windows to see where they come from.
Make sure all the files are local and there are no symlinks. If you are using remote file system or symlinks, deleting bin/fsnotifier binary can help. In any case it's a bug that should be reported.
When I installed the latest installment in Mac OSX - the Mountain Lion - I experienced some problems getting Eclipse to work I also lost most of my Android developer files (but I still have my projects). I suspect this is due to the choice of removing the /Developer and move the XCode and other Apple developer tools (I placed my Android tools here).
I have now installed the latest version of Eclipse and the problem still seems to be around. There are errors in all my projects and I get an error message prompting:
The type java.lang.Object cannot be resolved. It is indirectly referenced
from required .class files
I tried to check the Java class-path both in Eclipse and in my terminal and these seems to be OK. java and javac both run in my terminal and there is a valid path to the java source files in Eclipse (Under Preferences, Java, Installed JREs). That being said I'm not an expert in Eclipse so there may be that I have misunderstood how this problem ought to be solved. Anyone here with similar problems or who know the cure?
Make sure that you have a valid JRE or JDK defined in the Java Build Path of your project. Right-click on your project, select Properties... and then Java Build Path.
I had this problem moving a Maven project from Eclipse to RAD. I had a JSP file that worked in Tomcat and JBoss, but threw a NullPointerException in WebSphere on the form definition during the compile.
Anyway, after transforming the Maven project into an Ant project (mvn ant:ant), I imported the Ant project into RAD and got this error. The fix:
Open the Java Build Path, selecting the Libraries tab.
Find the JRE System Library and remove it.
Add the JRE System Library.
Goofy, but it works. It must reset some property in a file. I don't know if the problem is the older version of Eclipse or RAD.
After updating my Android SDK to make Appcelerator Titanium happy, I started getting "java.lang.Object cannot be resolved" for my Android projects in (non-Titanium) Eclipse.
I updated all dependencies in Eclipse, and the error healed after a restart of Eclipse.
I had that error almost every time I launched Eclipse for the first time; if I close and then re-open Eclipse, the error is gone.
I found this solution useful, though (I've copied here to protect the link, credit goes to the original author):
In Eclipse go to Windows -> Preferences -> Java -> Installed JREs.
Select the currently active JRE/JDK and press the Edit button.
Select the rt.jar and change its position in the list of JRE system libraries (e.g. press the Up button once).
Confirm all changes, clean and rebuild the workspace.
The next time you face the problem reposition the rt.jar again (or reset the order by pressing the Restore Default button).
please select your installed system jre version from java build path.
Try the following and problem will go away
Close the project and reopen it.
Clean the project (It will rebuild the buildpath hence reconfiguring with the JDK libraries)
OR
Delete and Re-import the project and if necessary do the above steps again.
This is an annoying Eclipse Bug which seems to bite now and then. See http://dev-answers.blogspot.de/2009/06/eclipse-build-errors-javalangobject.html for a possible solution, otherwise try the following;
Close the project and reopen it.
Clean the project (It will rebuild the buildpath hence reconfiguring with the JDK libraries)
OR
Delete and Re-import the project and if necessary do the above steps again.
The better cure is to try NetBeans instead of Eclipse
I got this error and what I had to do was remove the JRE from the Window/Preferences/Java/Installed JREs and re-add it. This somehow cleared up eclipse's cache and rebuilt the project successfully. To get rid of the error in the file-editor I also had to close it and open the file once again.
My problem was that I had in Eclipse: Window / Preferences... and then in the tree on the left Java / Installed JREs: C:\Program Files\Java\jre7
I changed to: c:\Program Files (x86)\Java\jre7
It solved my problem.
I had the same issue and none of the above solutions worked for me.
Then I realized than the library (libs) folder was missing in the project. Once i added the libs folder and the corresponding Jar file, the issue was resolved..
If your project specific (or if not applicable, workspace default) JDK/JRE is being referenced correctly and you've just begun to get this issue out of the blue: restart Eclipse.
Unfortunately, "restart Eclipse" is one of the standard troubleshooting steps when a project won't build. Eclipse even has a dedicated entry under the File menu.
I had to add the JDK under the build path. After adding the correct build path it worked.
I just had to restart eclipse, and the error went away. Strange.
I solved this by pointing my eclipse to the jre available in jdk.
This error caused by invalid sdk is pointing in your project.properties file of your project.
project.properties -> target=android-19 . change to version which is installed in your eclipse.The error will be gone.
I had the same issue after moving from JRE7 to JDK7. Finally I had to remove the JRE7 configuration from the Eclipse preferences and then add the following two lines to the eclipse.ini file.
-vm
C:\Program Files\Java\jdk1.7.0_55\bin\javaw.exe
I had this problem, and I understood that Eclipse has automatically imported a core reference, instead of the reference for the project I needed.
Deleted the import, and rearranged it, and everything worked fine.
Same problem facing Me
Project->properties->Android
And select the api level and also go in java build path and check some external jar file path if we already add in it.update the jar file path
On "The type java.lang.Object cannot be resolved. It is indirectly referenced
from required .class files":
I found my project had 2 meta-inf.java files in 2 different directories with the same 'module ' on line one (a copy/paste error).
Once this was corrected, I cleared the meta-inf.java file with the issue, rebuilding it line by line, guided by Eclipse, until I had a working module configuration.