play framework first project on NetBeans not working - java

I am creating my first project using play framework on NetBeans and I have done all the steps needed to create the project, nebeansify and so on. however the project is created with errors like package models doesn't exsit. so anyone knows if I am doing something wrong, also if anyone can give me useful links, videos.

If it's complaining about the models package being empty, just add a
model to it.
If that doesn't work, try closing the project, doing play netbeansify again and
reopening the project in NetBeans.
If it still doesn't work you can always add the missing dependencies to
the classpath manually (Project Properties -> Java Sources
Classpath). But this might mean you did something wrong while installing Play.

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How to properly add craftbukkit/spigot/paper as an external library in Eclipse?

I'm having issues including bukkit/spigot/paper into my Eclipse since when I try "extends JavaPlugin" in my Class it does not seem able to import the file
I have tried versions of craftbukkit, spigot and paper on several occasions but it just does not seem to work:
From all the online tutorials I have seen, I have noticed that on their versions of eclipse the "Modulepath" and "Classpath" headings do not seem to be there, but for me they are right there:
Could someone please tell me how to fix this issue?
I'm using Intellij IDEA and there is a plugin that create all the file on it, if you really want a clean environment use this to create your project and go back on eclipse after, i can create it and send you the main folder if you can provide you paper version that you want
You cannot use paper as a External JAR. Instead download Bukkit or Spigot from the internet (or use BuildTools to compile your own jar file), and use those instead of paper.

After creating android project in Eclipse ADT, tons of errors show up

I'm using eclipse ADT (most recent version) to develop some android apps. I've followed the getting started tutorial at the dev.android.com and it worked just fine.
But when i tried to create another project with the same targets and sdk's, i've got nothing but errors:
Some errors and my sdk's:
That's the same sdk's i used before these errors started showing up.
What can be causing this?
EDIT: my project won't generate the R.java file
You might need to add a support library to your new project.
Check this link for downloading the support libraries -
http://developer.android.com/tools/support-library/setup.html#download
Please notice that you need to import them into your eclipse and then include one (preferably the newest, not sure about this) in your project.
EDIT:
Before downloading the support libraries you should first check if you have them already.
Try this, right click project folder in the eclipse package explorer, Properties>Android>Library>Add>select a library if you have one.
There might be an invalid library included in your project already, if that happens then you will see it in the Library>Add> menu, remove it and add a new one.
You might have clean your project ........
if yes.....you must check whether R.java file is present in **Project(your project)->gen->package name->R.java**
if not than u have to update Tool Folder in SDK manager

Netbeans does not update my Netbeans-Platform application when I modify modules files

I'm currently having troube developing a Netbeans Application on a 7.3RC2 base : I have a few modules of my own, and when I run the application (from the module in netbeans), nothing appears to change since yesterday. Looks like my "executable" files are frozen, no matter what I'm doing.
I tried cleaning the modules, recreating them and import the source code, desperatly recreate the full project and paste the sources into it... no way.
Then, I wondered if there was a kind of "execution folder" which would contain some data kidding me.
I did some search on Google and SO, but found nothing answering this problem.
Any idea is welcome !
[EDIT 1]
It seems my Netbeans app is using an old module JAR, and does not update it despite of module clean&build.
Solved !
Something unexpectedly went wrong with the "Public APIs" configuration in all my modules and they where in "autoload" state, I don't know why.
I had the idea to manually uncheck and re-check all necessary checkboxes, and all is going right now.

NoClassDefFoundError when referencing from an Android-Project to a standard Java-Project

I am currently working on an android application that needs to use some shared classes which are also used on some serverside.
So on the one hand I have this standard java project inside eclipse where I have some POJOs, infercaes and so on. And on the other hand I have an android application project with an activity that should use those POJOs.
My first try to get the android project to know the java project was simply adding it as a "required project" in the build-path properties inside eclipse. That resulted into:
java.lang.NoClassDefFoundError: my.package.Pojo
I googled it and tried a lot, but still the question stands:
How do I set everything up properly, so that my ADT v21.1 android project will still know my java project, even at runtime?
Some things I already tried that did not seem to change anything:
after adding the "required project" I also set the dependency to be exported under eclipse "Order and Export" dialog
I tried building the java project as a jar-file and adding it as a jar-dependency to the android project
I created a android library project as 'glue': I added the java project as a dependency to the library project and the library project as a 'android dependency' to the android project
I checked that all projects where inside the filesystem in the same parent folder (read, that the underlying ant task might have some troubles otherwise)
I googled for a loooong time
Would really be nice if someone could help. Maybe I'm just missing some tiny little thind?
Bluddy
The Problem is that I build the java project using Java 7 which seems to by not supported by android. 'Phix' pointed that out in his very helpful posting (he was also andwering himself):
https://stackoverflow.com/a/13304441/1145459
(answer by Bluddymarri, I just posted it here to help him get it closed)

Eclipse not creating new .java file in New Project wizard?

OK, I have a really basic (read stupid) question. I am just beginning Java programming, and am using Eclipse 3.7.2. I have done a few beginning projects without any problems. All of a sudden, when I create a new project using the wizard, it is not creating the src/.java file. When I try to manually add it after creating the project, I end up getting some cryptic error messages.
I have re-followed several walk-throughs on project creation for clues as to any option I may have accidentally un-checked and no luck.
Googling the answer brings up results for more advanced problems that are unrelated.
I have combed the preferences, but nothing looks obvious, and
I have gone hunting for any user app data I could delete to force a clean slate.
I have even created a new instance of Eclipse to a different directory and still have the same result.
My son's instance, which is on the same computer still creates the .java file from the wizard. The only difference is that my instances have the Android SDK installed (I am trying to create basic Java projects and not Android projects).
I am at a loss, and have lost a lot of time trying to correct the situation. What do I need to do to reenable the creation of a src/.java file in Eclipse?
Screenshots (click on image for full size):
Make sure you are choosing a java project from the right folder in the wizard. It sounds like it is creating an android java project, which is probably why your src folder is missing. See if there is a helloworld project under example projects too in the wizard, that may get you started too. Screenshot may help us. I want to see which project type you choose and which folder it is in.
How about changing eclipse to point to a new workspace. That may drop the android settings. Under the file menu, choose switch workspace and pick a new location. Thats most likely why a new install did not fix it. That workspace may have android settings in it, so change to a new folder somewhere else to test it like c:\workspace2\
Here's a good tutorial I found that may help too.
eclipse java project tutorial

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