How to import a .java file into a JSP page?

This is my first time trying to use java for backend systems.

I read several guides on how to do this, and still understand the following points:

• I am not allowed to import .java files, but import class files.
• <% @page language = "java" import = "somefile. *"%> This is how I import the package.
• After importing the package, I need to create an instance of the class.

However, they confuse me with a few things.

Now I have a dynamic web project developing in the Eclipse IDE and using Tomcat7.0 apache.

I have a Java_Resources / SRC / somepackage / directory

and some .java files in the above directory.

Question 1, in Eclipse, when I run these files, they are automatically compiled. Where do these class files go?

Question 2, when I run the following code, I got some errors. What am I doing wrong? Is it because I don't have class files in the correct directory?

<%@ page language="java" import="twitter.*"%>

<%
    JavaFile jf = new Javafile();

    String result = jf.searchTweets("someString");
    System.out.println(result);
%>

Error Report:

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: An exception occurred processing JSP page /hello.jsp at line 10

7: <%@ page language="java" import="twitter.*"%>
8: 
9: <%
10:     Javafile jf = new JavaFile();
11:     
12:     String result = jf.searchTweets("someString");
13:     System.out.println(result);

Thanks for your time and effort.

note: I read the following links, but they don't seem to give a decision on how to write your own .java files and import these classes into your jsp files.

http://www.jsptut.com/

How to import classes in JSP?

http://www.coderanch.com/t/288534/JSP/java/importing-class-file-jsp

EDIT: I found my own answer.

This is my original catalog.

As you can see, my WEB-INF / lib is empty.

All that had to be done was to move the corresponding .jar files to this directory.

Note. I have already imported the corresponding .jar files into the Eclipse project, but it seems to me that I need to move them to WEB-INF / lib on top of importing them into the project.

, .