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 programs illustrate the Java.util.Stack.size() method:
Program 1: Stack with string elements.
// Java code to illustrate size() 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); // Displaying the size of Stack System.out.println( "The size is: " + stack.size()); } } |
Stack: [Welcome, To, Geeks, 4, Geeks] The size is: 5
Program 2: Stack with integer elements.
// Java code to illustrate size() 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); // Displaying the size of Stack System.out.println( "The size is: " + stack.size()); } } |
Stack: [10, 15, 30, 20, 5] The size is: 5