Java Utility Library

Java Stack - size() Method



The java.util.Stack.size() method returns the number of elements in the stack.

Syntax

public int size()

Parameters

No parameter is required.

Return Value

Returns the number of elements in the stack.

Exception

NA

Example:

In the example below, the java.util.Stack.size() method is used to find out the number of elements in the stack.

import java.util.*;

public class MyClass {
  public static void main(String[] args) {
    //creating a stack
    Stack<Integer> MyStack = new Stack<Integer>();

    //populating stack
    MyStack.push(10);
    MyStack.push(20);
    MyStack.push(30);

    System.out.println("Size of MyStack: " + MyStack.size());    

    //adding one more element in the stack
    System.out.println(MyStack.push(40) + " is added in MyStack."); 

    System.out.println("Now, Size of MyStack: " + MyStack.size());  
  }
}

The output of the above code will be:

Size of MyStack: 3
40 is added in MyStack.
Now, Size of MyStack: 4

❮ Java.util - Stack