Stack iterator() method in Java with Example Last Updated : 24 Dec, 2018 Comments Improve Suggest changes Like Article Like Report The Java.util.Stack.iterator() method is used to return an iterator of the same elements as that of the Stack. The elements are returned in random order from what was present in the stack. Syntax: Iterator iterate_value = Stack.iterator(); Parameters: The function does not take any parameter. Return Value: The method iterates over the elements of the stack and returns the values(iterators). Below program illustrates the use of Java.util.Stack.iterator() method: Example 1: Java // Java code to illustrate iterator() import java.util.*; import java.util.Stack; 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); // Creating an iterator Iterator value = stack.iterator(); // Displaying the values // after iterating through the stack System.out.println("The iterator values are: "); while (value.hasNext()) { System.out.println(value.next()); } } } Output: Stack: [Welcome, To, Geeks, 4, Geeks] The iterator values are: Welcome To Geeks 4 Geeks Example 2: Java // Java code to illustrate hashCode() 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(20); stack.add(30); stack.add(40); stack.add(50); // Displaying the Stack System.out.println("Stack: " + stack); // Creating an iterator Iterator value = stack.iterator(); // Displaying the values // after iterating through the stack System.out.println("The iterator values are: "); while (value.hasNext()) { System.out.println(value.next()); } } } Output: Stack: [10, 20, 30, 40, 50] The iterator values are: 10 20 30 40 50 Comment More infoAdvertise with us Next Article Stack iterator() 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 toString() method in Java with Example The toString() method of Java Stack is used to return a string representation of the elements of the Collection. The String representation comprises a set representation of the elements of the Collection in the order they are picked by the iterator closed in square brackets[].This method is used mai 2 min read Stack size() method in Java with Example The Java.util.Stack.size() method in Java is used to get the size of the Stack or the number of elements present in the Stack. Syntax: Stack.size() Parameters: The method does not take any parameter. Return Value: The method returns the size or the number of elements present in the Stack. Below prog 2 min read Stack capacity() method in Java with Example The capacity() method of Stack Class is used to get the capacity of this Stack. That is the number of elements present in this stack container. Syntax: public int capacity() Parameters: This function accepts a parameter E obj which is the object to be added at the end of the Stack. Return Value: The 2 min read Stack setElementAt() method in Java with Example The setElementAt() method of Java Stack is used to set the component at the specified index of this vector to be the specified object. The previous component at that position is discarded. The index must be a value greater than or equal to 0 and less than the current size of the vector. Syntax: publ 2 min read Stack retainAll() method in Java with Example The retainAll() method of java.util.Stack class is used to retain from this stack all of its elements that are contained in the specified collection. Syntax: public boolean retainAll(Collection c) Parameters: This method takes collection c as a parameter containing elements to be retained from this 3 min read Stack hashCode() method in Java with Example The Java.util.Stack.hashCode() method in Java is used to get the hashcode value of this Stack. Syntax: Stack.hashCode() Parameters: The method does not take any parameter. Return Value: The method returns hash code value of this Stack which is of Integer type. Below programs illustrate the Java.util 2 min read Stack removeAll() method in Java with Example The Java.util.Stack.removeAll(Collection col) method is used to remove all the elements from the Stack, present in the collection specified. Syntax: Stack.removeAll(Collection col) Parameters: This method accepts a mandatory parameter col which is the collection whose elements are to be removed from 2 min read Stack lastIndexOf() method in Java with Example The Java.util.Stack.lastIndexOf(Object element) method is used to check and find the occurrence of a particular element in the Stack. If the element is present in the Stack then the lastIndexOf() method returns the index of last occurrence of the element otherwise it returns -1. This method is used 2 min read Stack firstElement() method in Java with Example The Java.util.Stack.firstElement() method in Java is used to retrieve or fetch the first element of the Stack. It returns the element present at the 0th index of the Stack Syntax: Stack.firstElement() Parameters: The method does not take any parameter. Return Value: The method returns the first elem 2 min read Stack lastElement() method in Java with Example The Java.util.Stack.lastElement() method in Java is used to retrieve or fetch the last element of the Stack. It returns the element present at the last index of the Stack. Syntax: Stack.lastElement() Parameters: The method does not take any parameter. Return Value: The method returns the last elemen 2 min read Like