This section describes the APIs, features, and options that were removed in Java SE 13 and JDK 13. The APIs described here are those that are provided with the Oracle JDK. It includes a complete implementation of the Java SE 13 Platform and additional Java APIs to support developing, debugging, and monitoring Java applications. Another source of information about important enhancements and new features in Java SE 13 and JDK 13 is the [Java SE 13 ( JSR 388)](http://cr.openjdk.java.net/~iris/se/13/latestSpec/) Platform Specification, which documents changes to the specification made between Java SE 12 and Java SE 13. This document includes the identification of removed APIs and features not described here. The descriptions below might also identify potential compatibility issues that you could encounter when migrating to JDK 13. See [CSRs Approved for JDK 13](https://bugs.openjdk.java.net/issues/?jql=project%20%3D%20JDK%20AND%20issuetype%20%3D%20CSR%20AND%20status%20%3D%20Closed%20AND%20resolution%20%3D%20Approved%20AND%20fixVersion%20%3D%20%2213%22) for the list of CSRs closed in JDK 13.