# Using Existing Applications

The topics in this section explain how to work with existing components of WebLogic Workshop applications, including EJBs, JMS Queues, and Java code.

## Topics Included in This Section

How Do I: Reuse Existing Java Code?

How Do I: Access a File at Runtime?

How Do I: Add a Non-WebLogic Workshop JAR File to an Application?

How Do I: Add an Existing Enterprise JavaBean to an Application?

How Do I: Exchange Messages with a JMS Queue or Topic From a Web Service?

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