Linux and eclipse. With an eclipse problem

cajunchief · 09-28-2011, 06:48 PM

Hello All,

I am a Linux Newbie and am a JAVA newbie too. I am in a java class and am learning to write code. Yesterday, after completing most of my code I went and closed out all the -- for lack of a better term -- "screens" Now when I open Eclipse I hunt for my program and open it and when i go to compile my program i get " RUN AS
Select what to run:

Ant Build.

this is not the normal compile option and I don't know what is going on or how to fix it.
I hope this is the right forum for help. PLEASE HELP.

Thanx!!!

ButterflyMelissa · 09-30-2011, 03:48 AM

Hi,

Make things easy on yourself, leave everyhting as it is and just close Eclipse. It restores everything later on, well, it did now, but you did'nt expect this, did ya?

Somewhere on the left, you should see your project tree, expand it until you see your class(es), double-click on the one(s) you want to open and "poof"...

Happy coding!

Thor

cajunchief · 10-01-2011, 07:47 AM

Thor,
I did a close all. Is that what you were saying? Now when I logged back on, I have a total blank screen and have to figure out how to open all the windows and then figure out how to get it to compile again??????????????????????????????????????

HELP HELP HELP!

ButterflyMelissa · 10-01-2011, 12:01 PM

Dont panic, Eclipse is your friend

Okay, look at this image, see the left? Where it says "src" right above the folder "com.vehicles" - this is an example of how Eclipse organises stuff.

Look at your screen, see the tree at the left? Expand it until you see your source code...in this example, the file is called "car", by double-clicking on that name (in the tree) you open the file.

I'll keep this thread on the scope, dont worry

Thor

cajunchief · 10-02-2011, 06:42 PM

Thor,

I do see what your saying, however I can't figure out how to get the Eclipse to open as it did the first time i ever used it. Which would let me see all the views, and the edit section and also hopefully the compile option would be correct.

Sorry if i sound dumb!

crts · 10-02-2011, 07:44 PM

Quote:

Originally Posted by cajunchief

Thor,

I do see what your saying, however I can't figure out how to get the Eclipse to open as it did the first time i ever used it. Which would let me see all the views, and the edit section and also hopefully the compile option would be correct.

Sorry if i sound dumb!

Ok, let's take this one step at a time. Start by attaching a screenshot of how your Eclipse looks at the moment.

[EDIT]:
BTW, the very first time eclipse starts you get the 'Welcome Screen'. Is this what you want?
In this case click on Help->Welcome. At least in Galileo that is how to get to the welcome screen.

cajunchief · 10-04-2011, 10:45 PM

Thor,

I am trying to upload the screenshot you asked for thor. I am trying to find where it puts the file.

phil.d.g · 10-05-2011, 01:51 AM

Open the Window menu, go to Show View and click Package Explorer.

cajunchief · 10-06-2011, 11:49 AM

Phil,d.g.,

Step one worked! what is next I am trying to get the compiler to compile my program.

I opened the code up and hit the compile button and got the following message:

"Selection does not contain a main type."

crts · 10-06-2011, 12:32 PM

Did you open the project? Again, attach a screenshot. This is the fastest way for us to see what is missing.

cajunchief · 10-06-2011, 08:16 PM

CRTS,

THANKS and good feedback attached is the screen shot. Still need help. Thanx!!!

crts · 10-06-2011, 08:49 PM

Ok, your Eclipse looks fine so far.
The problem is that your program is flawed. As the message in a previous post suggests, it is missing the main function. I also see a lot of marked errors in your screenshot. This is another reason why your program will not execute even if you supply a class with a main function. Did your program execute before? If yes, then it might be necessary that you import some missing classes into your project, i.e. copy/move them to your source folder and then refresh the project by marking it in the package explorer and then hitting F5.

cajunchief · 10-09-2011, 10:20 PM

CRTS,

I understand what you said about my program not being correct. So I opened up an older program that I know does work. But the screen message i get when i try to compile it is shown on the attachment.

crts · 10-10-2011, 04:20 AM

Quote:

Originally Posted by cajunchief

CRTS,

I understand what you said about my program not being correct. So I opened up an older program that I know does work. But the screen message i get when i try to compile it is shown on the attachment.

AFAIK, you cannot just open a program and try to compile it in eclipse. You will have to create a project first. Then you can manually copy the existing source files into its project source folder.

Try the following:
File->New->Java Project

As project name enter: test
Click 'Finish'.

Right click on the newly created project and select:
New->Class

In field 'Name' enter: test
Click 'Finish'.

The new class window opens. Add a main function. E.g., This is how your class could look like:

Code:

public class test {
	public static void main(String[] args) {
		System.out.println("Hello World!");
	}
}

Save and run the project.
For more detailed tutorials have a look here:
http://eclipsetutorial.sourceforge.n...lbeginner.html
http://eclipsetutorial.sourceforge.net/
http://www.eclipse.org/resources/?category=Tutorial

cajunchief · 10-12-2011, 10:26 PM

[SOLVED]
Thank you CTRS,
the comments you gave me did help. I know I need to do the tutorials and I will very
very soon.

Thanx man.