https://developer.android.com/reference/java/io/NotSerializableException?authuser=3
NotSerializableException | API reference | Android Developers
api referenceandroiddevelopers
https://docs.oracle.com/javase/jp/21/docs/api/java.base/java/io/NotSerializableException.html
NotSerializableException (Java SE 21 & JDK 21)
declaration: module: java.base, package: java.io, class: NotSerializableException
java sejdk