Exception in thread "main" java.lang.ClassCastException: class test.Person2 cannot be cast to class java.lang.Comparable (test.Person2 is in unnamed module of loader 'app'; java.lang.Comparable is in module java.base of loader 'bootstrap')

at java.base/java.util.ComparableTimSort.countRunAndMakeAscending(ComparableTimSort.java:320)

at java.base/java.util.ComparableTimSort.sort(ComparableTimSort.java:188)

at java.base/java.util.Arrays.sort(Arrays.java:1041)

at test.test913.main(test913.java:15)