Find the .class file compiled by Eclipse

your java file location should be: org/odata4j/tomcat/ExampleProducerFactory.java then you can on command line do: javac org/odata4j/tomcat/ExampleProducerFactory.java which will create the compiled class file: org/odata4j/tomcat/ExampleProducerFactory.class put that in a folder WEB-INF/classes/org/odata4j/tomcat/ExampleProducerFactory.class

but better yet, create "Dynamic Web Project" in eclipse, which will take care of everything for you (just use defaults). the end result will be a .war file which you can create by the menu option: file->export

such a .war file can be deployed in any web container such as tomcat. look for an autodeploy directory within your tomcat or use the tomcat managment console to deploy it.

I find my classes files in Project -> Properties -> Java Build Path at field Default output folder. To me the default was 'project-name/target/classes'.

When you save your .java file, Eclipse will compile it into a .class file if there are not compiler errors. You can usually find this file in the bin subdirectory of your project. In particular, it will be in bin/org/odata4j/tomcat because you have declared your class to belong to the org.odata4j.tomcat package. Feel free to copy this file anywhere you wish.

Note: You should only use org.odata4j in your package name if you own the odata4j.org domain. Otherwise, you should choose your own package name.