I am new to java. I have just got Eclipse working (somehow) lol. well my programs are running fine until-
I save a program, close out of eclipse, and re-open the program. when I try to run it the same way that works for all the other programs, I am getting a message asking to "run with ant build". for some reason eclipse will not run any of my programs that have been closed out and re-opened, but will run new programs just fine.
does anyone know how to fix this???
thanks
EDIT- i would post an image, but I do not have at least 10 reputation.. what is happening is I go to open file => C:\Documents and Settings\xxxxxx\workspace\t\src\t (t is the program's name) and then I open it, and run it. When I run it (either F11 or the run button) it pops up a window saying "select what to run as", and the only options are 2 ant build icons. Running as ant build does not work, because this isn't an antbuild file. I created a new program just to test, (from scratch) and everything compiles and runs fine...
everything is compiling and running fine on NEW programs, but I just tried opening a program I created yesterday, and it is giving me the error mentioned above.. it was running perfectly fine yesterday. also, I have JDK installed at home, and I am getting this same exact problem.. JDK isn't the source.
EDIT- i have 10 rep now. Here's an image of what was happening before the fix
" what is happening is I go to open file.."
You don't want to open the file. You want to open the project
Click on File menu
Click on import
Click on General
Select on Existing Projects into Workspace. CLlick Next
Click Browse to search from your project
Select the Project, Click OK
Click Finish
The project should now show in your package explorer and you can then run it.
To run program JRE is enough.
If you want to build project you need JDK.
Eclipse is a Java application and it works without JDK,but it needs JDK to build a project.
Eclipse is not compiler or something like that, it's only an IDE.
Related
I am working on one simulator with netbeans IDE. I downloaded one simulator from their official website and it's install an running correctly in cmd.
I import existing project of one simulator into netbeans IDE and included all three libraries, so it have no error. But when i click on run icon, it gives me the following error.
So, as you see on the console tab(text with red marker), that's the error in which i need help. Thanks in advance...
Reason is you working directory in not correctly set in Eclipse for this project.
I was having same problem so I changed it.
Here is screenshot of my working directory. This Might help someone.
During the configuration of One with eclipse make sure that your run configuration path must be in synchronization with the arguments otherwise it will throws an error like you posted.
Steps:
Go to Run -> Run Configurations
After setting the proper configuration of one eclipse, Click on DTNSim present in core
Open Run Configuration Window
Click on Java Application-> Open Drag bar-> Click on DTNSim
Go To Arguments
Check Default and Others path:
It must be like the picture attached here!
One Simulator Working Window
I have an assignment for school where I need to download files from github, edit code, and run and test them. I downloaded the files into a general project folder in eclipse, but can't seem to figure out how to run the java files within eclipse. So far I've been getting by with just using the command line, but it would be much faster and more efficient to do everything within eclipse.
There are multiple java files each with a main class. They are all under the same project and I don't want to have to make individual projects for each. Most of my googling has had the answer "right click -> run as -> java project", but I am using eclipse neon and do not see that option. When I try to set up a run configuration, the project does not show up for the project field and if I manually enter it it says that the project does not exist. Any ideas on how to get this working? Thank you.
Edit- The way that I got the files from github was by clicking "File -> Import -> Projects from Git -> Clone URL -> Master (Next) -> Next ->
The simplest way to launch a Java program is to run it using a Java Application launch configuration. This launch configuration type uses information derived from the workbench preferences and your program's Java project to launch the program.
In the Package Explorer, select the Java compilation unit or class file with the main method you want to launch.
Press the Run [ The Run button ] button in the workbench toolbar or select Run > Run from the workbench menu bar. Alternatively, select Run As > Java Application in the Package Explorer pop-up menu, or select Run > Run As > Java Application in the workbench menu bar, or select Run As > Java Application in the drop-down menu on the Run tool bar button.
Your program is now launched, and text output is shown in the Console View.
I downloaded the files into a general project folder in eclipse
This is your problem - to launch java classes you want a java project
OK. It appears that I may have figured this out and have things the way that I want them. Thanks to #markspace for this link that describes a similar problem. The simple solution was to create a new java project that had the same name as the github folder that I was downloading from, then change the source from default to the local git folder where the files are located. I could then use the other recommended solutions to right click, then run as java application to run everything within eclipse. Thank you everyone for your help.
My instructor had us all install the Maven add-on for programming in Java. Now, any time I make a new Java program, it is not recognized by Eclipse. By this I mean it redirects to another program. Also, when looking in "Run Configurations", under "Java Applications", any new programs I make don't show up there. However, all programs should show up here.
Example:
Say I have a program named "Test" that I made before installing Maven. Now say I made a program "Test2" after installing Maven. When running Test, it works fine. But when running Test2, it runs Test. Other than it showing in the directory on the left, Eclipse makes no indication that Test2 actually exists. That is my issue.
My Question:
How do I completely remove Maven from my system? I don't want to use System Restore.
What I've Tried:
I have removed the Environment Variable "M3 HOME" and removed it from the "Path" variable. The issue is still there, however.
I have a Windows 10 Lenovo Y50-70 Gaming Laptop (64 bit) with 4K resolution. I am using Eclipse Luna.
After messing around a bit, I figured out the answer.
Right click any "src" folder, and click something along the lines of "Exclude Maven Artifact" under the "Maven" option. This removed it from Eclipse, and I can now make new programs and run them again.
Hope this helps whoever has my issue!
Can anyone help me with this error:
java was started but returned exit code = -805306369
C:\Windows\System32\javaw.exe
-jar C:\Program Files\Java\eclipse-jee-helios-SR2-win32-x86_64\eclipse\plugins\org.eclipse.equinox.launcher_1.11.1.R36x_v20101122_1400.jar
Just had this issue, for me it was a corrupted workspace osgi cache. The solution was to run eclipse with the -clean parameter as
eclipse.exe -clean
After some time, eclipse required to clean up, the workspace selection dialog popped up and I could start eclipse normally again.
The -clean parameter is documented in the eclipse help
My problem was a corrupted workspace the solution was from Rob's link:
http://spacetech.dk/eclipse-failed-java-was-started-but-returned-exit-code-805306369.html
I started getting the same error "exit code = -805306369" just out of no where.
Eventually I looked at the Eclipse logs at the <workspace_directory>/.metadata/.log and realized that my Source Control plugin (Perforce in my case) was unable to connect and the eclipse was stuck.
This was because my eclipse was piggy back(depending) on the client connection that I have with my Perforce windows client and my Perforce client was not connected to the server. I connected my Perforce client and the eclipse started working normal.
this happens when mostly workspace is corrupted..... cooler solution is just to switch the workspace to safer location(new location).... and just import the project from previous workspace... princess can still be saved....
For me , Just change your Workspace to another one
I got this error, when workspace already setted up. Since the java virtual machine cannot be created. try command: java -version
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.
I restarted my machine, and it solved my problem.
One of the class file in my project was corrupted. The name of a class file was too long and I was not able to delete or rename it, so I rename the folder containing it and then I was able to delete the project and that solved my problem.
Now i know that my workspace was corrupted, it solved my problem.
Go to your workspace and rename it.
Start your eclipse and by default it will create a workspace.
Go to File -> Switch Workspace, choose your original workspace.
I wasn't able to disable "Automatically find new updates and notify me." The option was not there on the Install/Updates page. Perhaps eclipse workbench has changed since that answer was written.
However, running eclipse with the -clean option in my old workspace did the trick for me. The way to do that in windows is to first find the directory where eclipse.exe lives. You can go to the start menu and in the "search menus and files" bar, type eclipse. You should see the purple globe icon pop up under "Programs." Hover your mouse over it and it will tell you the directory it exists in.
Then... open "computer" or some other window from the start menu and from there navigate to the window where eclipse is. Click your mouse in the bar at the top where the directory is displayed (somewhere not on the text). That directory will highlight. Now type cmd. A black command window will open and you will be in the directory where eclipse is. At the command prompt (drum roll) type eclipse.exe -clean
eclipse will start. Make sure it is asking to go to your corrupted workspace and click OK.
Wait for it and soon you will know if your workspace has been uncorrupted. Yay!
“java was started but returned exit code = -805306369” caused by Eclipse´s currupted workspace, I solved my problem with this 4 steps:
1) claose the eclipse.
2) Kill the adb from task manager.
3) Start your eclipse and by default it will create a workspace or start with new workspace.
4) Go to File -> Switch Workspace, choose your original workspace.
In my case, it is a work laptop, so pretty secure SOE
64 bit Win 7.
Unzipped Eclipse MARS onto a folder on "C" drive
Install failed consistently with Java error code -805306369
Created a separate folder on 'C' drive for workspace, granted
everyone full-control and that fixed it!!
I got same issue when opening files using shortcut - Ctrl+Shift+R.
I got it resolved by disabling "Automatic Updates".
Steps to disable automatic update in eclipse (helios): Windows >> Preference >> Install/Update >> Automatic Updates. Disable "Automatically find new updates and notify me".
How I managed to get mine working. I used a combination of the solutions above. It works for me.
Step 1: Change your workspace to some other names e.g. change it from workspace to workspace1.
Step 2: Access your eclipse and stop automatic updates (provided that you could access after changing your workspace)
Step 3: Exit your eclipse with workspace1
Step 4: Start your eclipse with former workspace by entering eclipse.exe -clean (if you are using others then use e.g. MuleStudio.exe -clean)
In conclusion, using a combination of solutions such as changing workspace, stop automatic updates and -clean work for me. Try it yourself.
This may well prove to be a simple config change, but I can't seem to find an obvious setting to solve the following problem:
I have a Vaadin project in Eclipse, which is configured to be debugged with Tomcat v6. If I select the top of the project in the project explorer and hit debug, the eclipse browser launches and my web app opens with the following url:
http://localhost:8080/MyVaadinProject/ THIS WORKS
However, if I'm currently looking at a java file (say Myproject.java), Eclipse tries to open the java file at this url:
http://localhost:8080/MyVaadinProject/WEB-INF/classes/com/example/myproject/Myproject.java
Of course, that produces a 404.
Having to deselect/close my java files every time I want to debug is quite tedious. Is there some way to prevent this behaviour in eclipse?
I am on OSX Lion, Eclipse version 3.7.2.
Thanks!
When running the project, instead of highlighting the class file in the Project Explorer, highlight the very base of the project before running.
This is what we want to run anyway, not the class file itself.
Go to
Windows -> Preferences -> Run/Debug -> Launching
There, at the bottom, select "Always launch the previously launched application".
Now you just have to click your project name in the package explorer and do a Run As -> Run on Server once.
After that launch, you will just need to hit the Run Button and your application should always start the way it should be.