Stack contains() method in Java with Example Last Updated : 24 Dec, 2018 Summarize Comments Improve Suggest changes Share Like Article Like Report The java.util.Stack.contains() method is used to check whether a specific element is present in the Stack or not. So basically it is used to check if a Stack contains any particular element or not. Syntax: Stack.contains(Object element) Parameters: This method takes a mandatory parameter element which is of the type of Stack. This is the element that needs to be tested if it is present in the Stack or not. Return Value: This method returns True if the element is present in the Stack otherwise it returns False. Below programs illustrate the Java.util.Stack.contains() method: Program 1: Java // Java code to illustrate contains() import java.util.*; public class StackDemo { public static void main(String args[]) { // Creating an empty Stack Stack<String> stack = new Stack<String>(); // Use add() method to add elements into the Stack stack.add("Welcome"); stack.add("To"); stack.add("Geeks"); stack.add("4"); stack.add("Geeks"); // Displaying the Stack System.out.println("Stack: " + stack); // Check for "Geeks" in the Stack System.out.println("Does the Stack contains 'Geeks'? " + stack.contains("Geeks")); // Check for "4" in the Stack System.out.println("Does the Stack contains '4'? " + stack.contains("4")); // Check if the Queue contains "No" System.out.println("Does the Stack contains 'No'? " + stack.contains("No")); } } Output: Stack: [Welcome, To, Geeks, 4, Geeks] Does the Stack contains 'Geeks'? true Does the Stack contains '4'? true Does the Stack contains 'No'? false Program 2: Java // Java code to illustrate contains() import java.util.*; public class StackDemo { public static void main(String args[]) { // Creating an empty Stack Stack<Integer> stack = new Stack<Integer>(); // Use add() method to add elements into the Stack stack.add(10); stack.add(15); stack.add(30); stack.add(20); stack.add(5); // Displaying the Stack System.out.println("Stack: " + stack); // Check for "Geeks" in the Stack System.out.println("Does the Stack contains 'Geeks'? " + stack.contains("Geeks")); // Check for "4" in the Stack System.out.println("Does the Stack contains '4'? " + stack.contains("4")); // Check if the Stack contains "No" System.out.println("Does the Stack contains 'No'? " + stack.contains("No")); } } Output: Stack: [10, 15, 30, 20, 5] Does the Stack contains 'Geeks'? false Does the Stack contains '4'? false Does the Stack contains 'No'? false Comment More infoAdvertise with us Next Article Stack contains() method in Java with Example C code_r Follow Improve Article Tags : Java Java-Collections Java - util package Java-Functions Java-Stack +1 More Practice Tags : JavaJava-Collections Similar Reads Stack indexOf(Object, int) method in Java with Example The Java.util.Stack.indexOf(Object element, int index) method is used to the index of the first occurrence of the specified element in this Stack, searching forwards from index, or returns -1 if the element is not found. More formally, returns the lowest index i such that (i >= index && O 2 min read Stack toArray(T[]) method in Java with Example The toArray(T[]) method method of Stack class in Java is used to form an array of the same elements as that of the Stack. 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