AbstractSequentialList contains() method in Java with Example Last Updated : 24 Dec, 2018 Comments Improve Suggest changes Like Article Like Report The contains() method of Java AbstractSequentialList is used to check whether an element is present in a Collection or not. It takes the element as a parameter and returns True if the element is present in the collection. Syntax: public boolean contains(Object element) Parameters: The parameter element is of type Collection. This parameter refers to the element whose occurrence is needed to be checked in the collection. Return Value: The method returns a boolean value. It returns True if the element is present in the Collection otherwise it returns False. Below programs illustrate the AbstractSequentialList.contains() method: Program 1: Java // Java code to illustrate // AbstractSequentialList.contains() import java.util.*; public class GFG { public static void main(String args[]) { // Creating an empty Collection AbstractSequentialList<String> abs = new LinkedList<String>(); // Use add() method to add // elements in the collection abs.add("Geeks"); abs.add("for"); abs.add("Geeks"); abs.add("10"); abs.add("20"); // Displaying the collection System.out.println("AbstractSequentialList: " + abs); // Check if the collection contains "Hello" System.out.println("\nDoes the Collection" + " contains 'Hello': " + abs.contains("Hello")); // Check if the Collection contains "20" System.out.println("Does the collection" + " contains '20': " + abs.contains("20")); // Check if the Collection contains "Geeks" System.out.println("Does the Collection" + " contains 'Geeks': " + abs.contains("Geeks")); } } Output: AbstractSequentialList: [Geeks, for, Geeks, 10, 20] Does the Collection contains 'Hello': false Does the collection contains '20': true Does the Collection contains 'Geeks': true Program 2: Java // Java code to illustrate // AbstractSequentialList.contains() import java.util.*; public class GFG { public static void main(String args[]) { // Creating an empty Collection AbstractSequentialList<Integer> abs = new LinkedList<Integer>(); // Use add() method to add // elements in the collection abs.add(10); abs.add(20); abs.add(30); abs.add(40); abs.add(50); // Displaying the collection System.out.println("AbstractSequentialList:" + abs); // Check if the collection contains 10 System.out.println("\nDoes the Collection " + "contains '10': " + abs.contains(10)); // Check if the collection contains 50 System.out.println("\nDoes the Collection" + " contains '50': " + abs.contains(50)); // Check if the Collection contains 100 System.out.println("Does the collection" + " contains '100': " + abs.contains(100)); } } Output: AbstractSequentialList:[10, 20, 30, 40, 50] Does the Collection contains '10': true Does the Collection contains '50': true Does the collection contains '100': false Comment More infoAdvertise with us Next Article AbstractSequentialList contains() method in Java with Example C code_r Follow Improve Article Tags : Java Java-Collections Java - util package Java-Functions java-AbstractSequentialList +1 More Practice Tags : JavaJava-Collections Similar Reads AbstractSequentialList in Java with Examples The AbstractSequentialList class in Java is a part of the Java Collection Framework and implements the Collection interface and the AbstractCollection class. 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