The following classes are using sun.misc.Unsafe

com.google.common.cache.Striped64
com.google.common.hash.LittleEndianByteArray
com.google.common.primitives.UnsignedBytes
com.google.common.util.concurrent.AbstractFuture

class sun.misc.Unsafe is a jdk internal class. package sun.misc is jdk internal after jdk 8. In jdk16, --illegal-access=deny was default. This option is ignored in jdk 17. usage context: run method declaration (return type) 

Refer http://openjdk.java.net/jeps/260