So I am new to working with web and server related projects and I am trying to create a new Dynamic Web Project on the Eclipse IDE.
After clicking finish on the "new dynamic web project" window, a new project is created (though it is missing most folders) and the window remains open. If I hit Finish again, I am prompted with this error: "Cannot install project facet Java 10. Some version of this project is already installed."
If I simply close the window, after the project is created, it lacks files I am seeing in examples online, and I cannot create a new servlet for it.
The following query: "Cannot install project facet" error while creating a project?
Is not really helpful as it relates to creating a project from existing code and that seemed to be the source of the issue.
I already tried using different project names, and web module version but no luck.
Any help would be appreciated
As mentioned in the comments the problem was indeed with the version.
Updating to the latest version of Eclipse IDE for Enterprise Java and Web Developers fixed the issue.
Related
I have installed eclipse Oxygen in windows 10. I don’t find the “dynamic web project” option under project list. I have already installed Web, XML, Java EE using below link
How to fix Dynamic Web Project missing in Eclipse Oxygen
How to fix missing dynamic web page in eclipse oxygen?
Help --> Install New Software--> place this URL in work with field
http://download.eclipse.org/releases/oxygen/
Select the list of software's which do you want to update and complete normal update process. Once, installation completed you have to restart the eclipse. So, you are able to create the Dynamic Web Project.
Thanks,
I'm trying to make a libgdx Android project work (= build) on Eclipse. It's the project from the book "Libgdx Game Development" : I just opened the GDX set up GUI and created a project named "demo".
I get two errors about GWT in the "Problems" Tab, in the demo-html project :
The project was not built since its build path is incomplete. Cannot find the class file for com.google.gwt.core.client.EntryPoint. Fix the build path then try building this project
2.The type com.google.gwt.core.client.EntryPoint cannot be resolved. It is indirectly referenced from required .class files
I have GWT Designer for GPE, Google Plugin for Eclipse and SDKS installed in the plug-in tab (from the Help > Install new Software), so I have no idea why it doesn't work.
All the questions that had those error messages were resolved by downloading the plug-ins I quoted, but in my case, they are downloaded and installed (can't re-install them since it tells me it is already installed) and I hit also already checked for updates.
Thanks in advance.
I implemented the current version of ActionBarSherlock to my Android Project.
Everything works fine and I don't get any errors.
But when I try to debug or export my project I don't get an .apk-file out of my project. Just a .jar-file with the name of my project.
I've read about some problems the SDK had with building projects that contain external libraries but this was at SDK version 14 and so I hope, this bug is fixed...
So there might be another cause for this problem.
Does anybody know a possible solution?
You cannot get *.jar file as the result of building Android project. This seems very strange to me. There must be something wrong with your project settings (if you changed them), or the project you build is of the wrong type (i.e. it is Java Application instead of Android Application).
You didn't mention which IDE do you use, but I assume you use Eclipse.
Make sure you have installed Android SDK and Eclipse ADT correctly (just in case).
Next thing to try is to create a new Android Application project from existing sources (there should be such option during the process of creation).
I am trying to create a UI for a java web app using Vaadin.
I am using Eclipse for this purpose, and I have installed the Google Plugin for Eclipse (which includes GWT SDK) as well as the Vaadin plugin for eclipse.
I created a new project using New Project-> New Vaadin Project... but I am seeing an error message in Eclipse console "GWT SDK not installed."
How do I resolve this error? I have already installed Google Plugin for Eclipse which includes GWT SDK.
Thanks...
Check in 'Preferences->Google->Web Toolkit' if you have existing SDK marked as default. Sometimes, after installing or unistalling other plug-ins, this may get reset to some older, not anymore existing, SDK version.
Also, make sure you have the default (or any other existing SDK) selected in project properties under 'your project->properties->Google->Web Toolkit->GWT SDK'.
Today I resolved this issue (which cropped up after a GWT SDK update on a perfectly working setup) by going to project Properties/Builders and moving the GWT "Google Web Toolkit Project Validator" up to just below Java Builder. I'd tried everything I could think of before that, including uninstalling and re-downloading the SDK, checking default and specific SDK's, trying older ones, editing .classpath entry manually.
Just in case poor some soul follows the path I went through. Using Eclipse Indigo.
help->check for updates
Update all libraries
then:
right-click the project, choose Project Properties->Java Build Path->Libraries
remove invalid GWT library, if any
choose Add Library, choose Google Web Toolkit
If an unknown version of the sdk is selected, click the Configure SDKs link and remove old versions or at least select the current, valid version.
Then, do a Project->clean just to be on the safe side, and your project should now build.
This worked for me using Eclipse Helios.
I have a question regarding the development of liferay portlets using the liferay plugin SDK. My question goes mainly in the setup of the development IDE. The suggested one would be to use Netbeans IDE which I also tried out, but it appears to run very slowly on my machine while Eclipse is quite performant.
The setup for Netbeans IDE is the following
Go to the directory \portlets
Run the create.bat (or sh file depending on the OS) to create a new sample portlet
Run Netbeans IDE, create a new "Java free form project" and point it to the directory of the created sample portlet
That's it, pretty simple.
For the mentioned reasons above (and because I'm a lot more familiar with Eclipse) I'd like to import the project into Eclipse the same way. Is there a way for doing it without having to change too much in the original structure of the created sample portlet and the according build.xml (ant file)?? I tried already to create a new project out of the build.xml ant file of the created sample portlet, however in this way it doesn't include me the source code.
I didn't also find great tutorials on the web...
Could someone help me with this, pointing out online tutorials or give me some hints.
Thanks
I know your pain. Starting to work with Liferay needs much time. I you do not want to edit the existing source, but only crate your own portlets, you can download the plugins SDK from the 'Additional Files' section on the Liferay website. This provides ant scripts, to create a simple JSR compliant portlet, and to create all necessary things, to create a sound Eclipse project, for example:
ant -Dportlet.name=<project name> -Dportlet.display.name="<portlet title>" create
Than cd into the directory of your created portlet an do:
ant setup-eclipse
After that you should be able to create a new project from the sources in that directory in Eclipse, which can then be deployed via another ant script to the running tomcat instance. If you already know somthing about portlet programming, you shoud be pretty much settled now. If not, try to find documentation about JSR portlet programming first, before looking into Liferay specifig portlet development.
Liferay has now released an official set of Eclipse plugins that support portlet development. Here is the installation guide for installing the eclipse plugins:
Liferay IDE Installation Guide
Also there is a getting started guide that shows what to do after installation to actually setting up your first portlet project.
Getting Started Tutorial
Liferay IDE uses the Plugins SDK from Liferay under the covers to do all the work. If you already have existing projects that you created with the Plugins SDK those can be imported into Liferay IDE as well.
Importing existing Projects
you can find the tutorial for deploying liferay in eclipse
http://www.liferay.com/web/guest/community/wiki/-/wiki/Main/Development+Environment+(Windows)
No clue about Liferay's specifics, but in general, I'd do this:
Follow the steps 1 and 2 from your NB setup list
Create a new Dynamic web project (or a Java project if you don't need the web project's features) in Eclipse
Import the contents of sample portlet directory by doing Import -> File system in Eclipse
Adjust the project's Java source directory to point to the generated sample portlet source directory (that should now appear in your project)
Adjust classpath of the project, point it to LR lib folders, ...
If there's a generated build.xml, check if it can be used to deploy to LR, or to produce builds.
As of March 2011, there is some official Liferay support for NetBeans and as noted before, there is official support for Eclipse ( In the Marketplace). The Documentarian uses Eclipse himself, though many examples just use the Plugins-SDK with shell scripts, ant scripts and no IDE.
We are fighting with Liferay on Eclipse, Eclipse seems buggy and unpredictable, but we are also new to J2EE and Eclipse ( so discount this last comment a bit), and I have our portlet files setup in a separate area for SVN, requiring a refactor-move, refactor is definitely buggy.
You should be aware that there is a book for developers on the way from the official documentarian - we've bought the early release and found it useful. He does cover some IDE issues. See Manning press.
The Liferay sample portlets ( there are many) are not set up for Eclipse projects, and you'll have to import some java files and jump through some Eclipse hoops to get them into a running Eclipse project you can develop.