1. What sort of error do you get when you try to display them?
2. In your workspace you can have several projects, i. e. in separate folders and connect to them like: http://localhost/pro1
3. You can configure a virtual host for each project, too. Then you can access them with a name you define. That's more flexible.
But we don't know what you are doing with eclipse yet. PHP, Java,...? In most cases it is better to keep as many of the program files outside of the document root as possible because there they are within reach of the web user.