Arraylist in Java

package com.company;

import java.util.ArrayList;

public class tuts {
     public static void main(String[] args) {
         ArrayList<Integer> l1 = new ArrayList<>();
         l1.add(6);
         l1.add(7);
         l1.add(4);
         l1.add(6);
         l1.add(5);

         for (int i=0; i<l1.size(); i++){
             System.out.println(l1.get(i));
         }
//        l1.clear();
         System.out.println(l1);
         System.out.println(l1.contains(4));
         System.out.println(l1.contains(44));
         System.out.println(l1.contains(6));
         System.out.println(l1.indexOf(948));
     }
}