June 2004
Beginner to intermediate
364 pages
7h 38m
English
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4.11. Using .jar and .class Files
Problem
You need
to access code in a
.jar or .class file in your
project, but Eclipse can’t find these files.
Solution
Select the project in the Package Explorer, and then select
Project→ Properties to open the Properties dialog. Click the
Libraries tab in this dialog, click Add External JARs for
.jar files or Add Class Folder for
.class files, navigate to the
.jar file or to the folder containing
.class files, and click OK.
Discussion
Often you need other code in the build path, such as
.class or .jar files. For
instance, say you’re developing a Java servlet, as
shown in Example 4-3.
Example 4-3. A simple servlet
package org.cookbook.ch04;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class ServletExample extends HttpServlet {
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws IOException, ServletException
{
response.setContentType("text/html");
PrintWriter out = response.getWriter( );
out.println("<HTML>");
out.println("<HEAD>");
out.println("<TITLE>");
out.println("Using Servlets");
out.println("</TITLE>");
out.println("</HEAD>");
out.println("Using Servlets");
out.println("</BODY>");
out.println("</HTML>");
}
}A lot of the support for servlets is in
servlet.jar. Eclipse can’t find
servlet.jar by itself, so a lot of wavy red
lines will appear when it comes to the imports, as shown as in Figure 4-17.
Figure 4-17. Missing the servlet.jar file
To add servlet.jar to the build path, select Project ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.