# External Applications

External applications are your custom applications that are deployed outside of Lenses, for example a Java Kafka Streams or Python Application.

You can register these into ways:

<table data-view="cards"><thead><tr><th></th><th data-hidden data-card-cover data-type="image">Cover image</th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><strong>Java SDK</strong></td><td><a href="https://3471212993-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FJpmk4J5g3Kj2RRRpYUrl%2Fuploads%2FuBmxermrAZIPmrOmVxvV%2FExternal%20Apps%20--%20Java%20SDK.png?alt=media&#x26;token=30c86652-0644-46e2-8814-333449f32568">External Apps -- Java SDK.png</a></td><td><a href="external-applications/registering-via-sdk">registering-via-sdk</a></td></tr><tr><td><strong>HTTP Rest Call</strong></td><td><a href="https://3471212993-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FJpmk4J5g3Kj2RRRpYUrl%2Fuploads%2FnP1KvgOaIB4i0iqNoHlj%2FExternal%20Apps%20--%20HTTP%20Rest%20app.png?alt=media&#x26;token=e5db813f-68c9-4df5-b452-24fb0926136e">External Apps -- HTTP Rest app.png</a></td><td><a href="external-applications/registring-via-rest">registring-via-rest</a></td></tr><tr><td><strong>Web UI</strong></td><td><a href="https://3471212993-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FJpmk4J5g3Kj2RRRpYUrl%2Fuploads%2FSURPG4rC0dWjiQDK9jN4%2Fweb_ui.png?alt=media&#x26;token=79de6db3-4c9a-4c0f-8944-4efb1dfdeaaf">web_ui.png</a></td><td><a href="external-applications/registering-via-web-ui">registering-via-web-ui</a></td></tr></tbody></table>