The clients use Java JRE to access Oracle Forms, will need purchase Oracle Java SE Support beyound 2
I work in a oracle partner company. We develop a system in Oracle Forms.
Our clients needs install Java JRE to access the oracle web forms in clients desktops (with java plugin or java web start).
In the weblogic/forms server are installed JDK.
By the information in the link https://www.java.com/en/download/release_notice.jsp and in metalink note
"Support Entitlement for Java SE When Used As Part of Another Oracle Product ( Doc ID 1557737.1 )", ORACLE CUSTOMER who is licensed to use Java SE as part of another Oracle product, you continue to have access to Oracle Java SE 8 updates beyond 2019 for use with those Oracle products.,