I'm using Eclipse Indigo in Windows 7 and I don't know how to open a file. That is, when I run Eclipse I display the window to select the workspace what I want to work. After selecting it, I can't find any option to open a project. What I can do only is to open a file. I select the file to open and when I run it, I display a window with two options that are the same for me:
Have you gone through the tutorials provided in the Eclipse help? Look at Help | Help Contents and then under Workbench User Guide | Getting Started and then under Java Development User Guide | Getting Started.
Basically, you first create a project, then then you create files within that project. If you have existing files, you can copy them into a project directory and refresh the project and it will include the files.