title: Java projects not being recognized by Eclipse; classpath problems
body: <p>I am a very inexperienced programmer.  I have just taken a weeklong class on Java programming in Eclipse.  When I got home and installed Eclipse on my home computer, I was able to bring up the program I made in the editor but Eclipse would not run it; it only accepted .ant files.</p>
  <p>I was able to get projects to show up in the Project Explorer (by importing them) and change the classpath to recognize those projects, but nothing shows up as an option to select a main class in run&gt;run configurations&gt;Java application.  I am very confused as I have not been taught to use these features of Eclipse in the one week of Java experience I have.  Any help would be very much appreciated.</p>
  <p><strong>Update</strong>: When I try to configure the build path/classpath, I <em>still</em> have no options for selecting a main class in run&gt;run configurations&gt;Java application, even after following Logan's advice.  The JRE system library is still on the build path, but there's a red X on its icon in my project's properties.Plus, this is also at the top of my project's Properties window:</p>
  <p>&quot;Build path entry is missing: org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.7</p>
  <p>To make matters worse, when I click the Run button, the options for the type of file to run the script depend on what I have selected.  If I've selected the project in the Project Explorer, the options are Java Applet and Java Application, but if I've selected the code in the display, the .ant file options come up.</p>
  <p>Plus, there is no # in front of the name of the source folder.</p>
  <p>One more important piece of info:  The Eclipse SDK folder never downloaded, for some reason.  However, I extracted all the .zip files in the Juno folder and the Eclipse application did appear.</p>
  <p>Help would be appreciated, especially as literal, straightforward directions on what to do.  Thank you.</p>