This example checks whether an ArrayList contains a set of objects or a sublist from another collection (arraylist, linkedList, TreeMap, TreeSet, HashSet). This check is done with the method containsAll() interface Collections. The method containsAll() returns a true Boolean if the ArrayList contains all the items in this collection, otherwise false.

import java.util.ArrayList; 
import java.util.Collections; 
 
public class ContainsAllExample {
 
 public static void main(String a[]){
 ArrayList arlist = new ArrayList(); 

 arlist.add("o1"); 
 arlist.add("o2"); 
 arlist.add("o3"); 
 arlist.add("o4"); 
 arlist.add("o5"); 
 arlist.add("o6"); 
 
 System.out.println("ArrayList: "+arlist); 
 
 ArrayList sublist = new ArrayList(); 

 sublist.add("o2"); 
 sublist.add("o4"); 
 sublist.add("o6"); 
 
 System.out.println("Item List: "+sublist); 

 boolean b = arlist.containsAll(sublist); 
 
 System.out.println(b); 
 
 }
}

Result:

ArrayList: [o1, o2, o3, o4, o5, o6]
Item List: [o2, o4, o6]
true

References: