Sorting an array collections java

// Array sorting 
Integer ARR [] = {3,4,2}; 
Arrays.sort (ARR); // default ascending 
Arrays.sort (arr, Comparator.reverseOrder ()) ; // pass a reverse comparator 
Arrays. Stream (ARR) .forEach (the System.out :: Print); 

// set sorted 
List <Integer> = new new List the ArrayList <> (); 
List.add (2); List.add (. 3); List.add ( 1); 

list.sort (Comparator.naturalOrder ()); // List natural order 
list.stream () forEach (System.out :: println);. 
list.sort (Comparator.reverseOrder ()); // List in reverse order 
list.stream () forEach (System.out :: println);. 

Collections.sort (List); // Sort the Collections of natural 
list.stream () forEach (System.out :: println);. 
Collections.sort (List, Comparator.reverseOrder ()); // Collections reverse 
list.stream () forEach (System.out :: println ).;