java - Object functions and generics -

as homework assignment, need restructure code in textbook. goal to, using findmax method , function object technique, find "findmax" of character , string array findmax return char last in alphabet , string, return string starts last letter in alphabet ignoring case sensitivity. question if have done correctly (i have doubts)? don't want errors or warnings. don't want copy , paste answers. want better understanding of how can this. here code:

import java.util.comparator;  public class lab1q6 { public static <anytype extends comparable<? super anytype>> anytype findmax( anytype [ ] arr, comparator<? super anytype> cmp ){     int maxindex = 0;      for(int i=1; < arr.length; i++)         if( cmp.compare( arr[ ], arr[ maxindex ] ) > 0 )              maxindex = i;     return arr[ maxindex ];  } public static class caseinsensitivecompare<anytype extends comparable<anytype>> implements comparator<anytype> {     public int compare( string lhs, string rhs )     { return lhs.compareto( rhs ); }      @override     public int compare(anytype o1, anytype o2) {         return o1.compareto( o2 );      } }  @suppresswarnings({ "unchecked", "rawtypes" })     public static void main(string[] args) {         string [] array = {"owl", "zebra", "gator", "ant", "reindeer"};         character [] arr = {'c', 'z', 'a', 'r', 's'};          system.out.println( findmax(arr, new caseinsensitivecompare()));         system.out.println( findmax(array, new caseinsensitivecompare()));  }  }