> For the complete documentation index, see [llms.txt](https://docs.pentaho.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.pentaho.com/pdia-data-integration/9.3-data-integration/pdi-transformation-steps-reference-overview/user-defined-java-class/general-user-defined-java-class/class-code-user-defined-java-class.md).

# Class Code (User Defined Java Class)

![Class code panel](https://3411831820-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FAYwCj9fPr1B2pjC11IOQ%2Fuploads%2Fgit-blob-4a69340617a11cd8d8dfd5216dc808b737e06ee2%2FPDITransStep_UserDefinedJavaClass_ClassCode.png?alt=media)

Add your defined Java code directly in the **Processor** tab in the **Class code** panel. You can create additional tabs for more code blocks by right-clicking and selecting **Add new**. This menu also includes options for copying a tab, setting a transformation class, or removing a class type.


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