Java arraylist implaemention and contains example

import java.util.ArrayList;

class Main {

  public static void main(String[] args) {

      ArrayList<Integer> al1 = new ArrayList<Integer>();

      al1.add(56);

      al1.add(88);

      ArrayList<Integer> al2 = new ArrayList<Integer>();

      al2.add(1);

      al2.add(99);

      al2.add(56);

      al2.add(13);

      al2.add(44);

      al2.add(6);

      for(Integer number : al2) {

       if( al1.contains(number)){

         System.out.println("player exist");

         return ;

       }

        System.out.println(number);

  }

      // System.out.println("'55' is present in arraylist: "+al2.contains(55));

      // System.out.println("'44' is there in arraylist: "+al2.contains(44));

      // System.out.println("'7' is there in arraylist: "+al2.contains(7));

  }

}