Stack push() Method in Java

Difficulty Level : Easy
Last Updated : 02 Aug, 2018

The Java.util.Stack.push(E element) method is used to push an element into the Stack. The element gets pushed onto the top of the Stack.

Syntax:

STACK.push(E element)

Parameters: The method accepts one parameter element of type Stack and refers to the element to be pushed into the stack.

Return Value: The method returns the argument passed.

Below programs illustrate the Java.util.Stack.push() method:

Program 1: Adding String elements into the Stack.

// Java code to illustrate push() method 
  
import java.util.*; 
  
public class StackDemo { 
    public static void main(String args[]) 
    { 
        // Creating an empty Stack 
        Stack<String> STACK = new Stack<String>(); 
  
        // Use push() to add elements into the Stack 
        STACK.push("Welcome"); 
        STACK.push("To"); 
        STACK.push("Geeks"); 
        STACK.push("For"); 
        STACK.push("Geeks"); 
  
        // Displaying the Stack 
        System.out.println("Initial Stack: " + STACK); 
  
        // Pushing elements into the stack 
        STACK.push("Hello"); 
        STACK.push("World"); 
  
        // Displaying the final Stack 
        System.out.println("Final Stack: " + STACK); 
    } 
} 

Output:

Initial Stack: [Welcome, To, Geeks, For, Geeks]
Final Stack: [Welcome, To, Geeks, For, Geeks, Hello, World]

Program 2: Adding Integer elements into the Stack.

// Java code to illustrate push() method 
import java.util.*; 
  
public class StackDemo { 
    public static void main(String args[]) 
    { 
        // Creating an empty Stack 
        Stack<Integer> STACK = new Stack<Integer>(); 
  
        // Use push() to add elements into the Stack 
        STACK.push(10); 
        STACK.push(15); 
        STACK.push(30); 
        STACK.push(20); 
        STACK.push(5); 
  
        // Displaying the Stack 
        System.out.println("Initial Stack: " + STACK); 
  
        // Pushing elements into the Stack 
        STACK.push(1254); 
        STACK.push(4521); 
  
        // Displaying the final Stack 
        System.out.println("Final Stack: " + STACK); 
    } 
} 

Output:

Initial Stack: [10, 15, 30, 20, 5]
Final Stack: [10, 15, 30, 20, 5, 1254, 4521]

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