• ArrayList doesn't have sort() method.
• We can use the static sort  method of the Collections class
• It sorts the given Collection object.

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

public class List1 {
    public static void main(String[] args) {
     Integer ar[]={444,222,333,111};
     ArrayList list=new ArrayList();
     list.add(ar[0]);
     list.add(ar[1]);
     list.add(ar[2]);
     list.add(ar[3]);
     System.out.println("Withiout sorting "+list);
     Collections.sort(list);
     System.out.println("After sorting "+list);
  }
}

Output
Withiout sorting [444, 222, 333, 111]
After sorting [111, 222, 333, 444]

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