[rpiggott@1mm java_play_directory]$ javac HelloWorldApp.java
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1. ERROR in HelloWorldApp.java (at line 3)
        import javax.servlet.http.HttpServlet;
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
The import javax.servlet cannot be resolved
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2. ERROR in HelloWorldApp.java (at line 4)
        import javax.servlet.http.HttpSession;
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
The import javax.servlet cannot be resolved
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3. ERROR in HelloWorldApp.java (at line 5)
        import javax.servlet.http.HttpServletRequest;
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
The import javax.servlet cannot be resolved
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4. ERROR in HelloWorldApp.java (at line 6)
        import javax.servlet.http.HttpServletResponse;
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
The import javax.servlet cannot be resolved
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5. WARNING in HelloWorldApp.java (at line 8)
        import java.io.IOException;
               ^^^^^^^^^^^^^^^^^^^
The import java.io.IOException is never used
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6. WARNING in HelloWorldApp.java (at line 9)
        import java.io.OutputStream;
               ^^^^^^^^^^^^^^^^^^^^
The import java.io.OutputStream is never used
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7. WARNING in HelloWorldApp.java (at line 10)
        import java.io.PrintStream;
               ^^^^^^^^^^^^^^^^^^^
The import java.io.PrintStream is never used
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8. ERROR in HelloWorldApp.java (at line 12)
        public class HelloWorldServlet extends HttpServlet {
                     ^^^^^^^^^^^^^^^^^
The public type HelloWorldServlet must be defined in its own file
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