A warning appears under my project name? [closed] - java

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I posted a questions a couple of days ago about eclipse notifying me of an error I didn't have.
An error appears under my project name but no error exists?
I fixed that error but now I face another problem. Under my project name, a little yellow warning sign appears. My program runs fine though. Can someone explain to me what it means or how to get rid of it?

Click Window > Show View > Problems to open the Problem View. This should list any warnings/errors showing up in Package Manager.

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I still can't find a solution for this android studio problem [closed]

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A short time ago the application was working fine for me, but I kept modifying the project and I got this error that I still can't find a solution for, I would like to know if you can help me, thank you very much
enter image description here
enter image description here
That is the problem that comes
That is the problem that comes

java error "Failed to download required installation files." [closed]

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On my Windows 7 machine the Java update consistently fails with this error message.This seems to a common problem, does anyone have an insight into what's going wrong, and is there a fix for it other than either disabling the update check (seems a bad idea from a security point of view) or waiting for the nag message and then manually installing the new version (annoying and stupid from a usability point of view).
I downloaded offline and online installers from the official java website, but they just don't run

Unable to parse template "Class" Error message: This template did not produce a Java class or an interface [closed]

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Please help me, whenever I'm creating a new class in IntelliJ
It give me a popup box cannot create class
I tried my directory marking it as 'Sources Root'(got from stackOverflow), but still I cannot resolve my problem.
Currently I'm using Linux(14.04, 64-bit)-OS.
IntelliJ version-->Intellij IDEA 2017.1.3
I know my problem statements end's up in 2 lines..but this is the only what I could post

Where can I find source code for tutorials on developer.android.com site? [closed]

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I just started learning android and work on second class Adding the action bar.
I followed this tutorial and I see that some files are missing and I have errors on my project.
Is there a place where I can fetch source code for this and other tutorials on developer.android.com.
I searched the site but found no reference where sources can be.
Thank you!
Check and import from this path of your own computer.
D:\adt-bundle-windows-x86_64-20130522\sdk\samples
i.e go into your sdk -> samples ...
Everything is inside this..

GAE not initialized JAVA [closed]

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I am trying to work with Google App Engine.
I have Eclipse on my PC
and I have upgraded my Java to 1.7.0_45
Like this picture : http://ppt.cc/U9Wv
but I can't initialized
how can I resolve it ?
thanks
Please do the following:
In Eclipse, go to Window -> Show View. Select Problems. This should show a list of issues currently in your Project that is resulting in the Error.

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