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import java.util.ArrayList; public class ArrayListRetainAllExample1 { ArrayList
numbers = new ArrayList<>(); numbers.add("10"); System.out.println(numbers); // [10] ArrayList
numbers1 = new ArrayList<>(); numbers1.add("1"); numbers1.add("2"); numbers1.add("3"); System.out.println(numbers1); // [1, 2, 3] System.out.println(numbers1.retainAll(numbers)); // true System.out.println(numbers1); // [10] }
Output