Java Stack push() example

In this guide, you will learn about the Stack push() method in Java programming and how to use it with an example.

1. Stack push() Method Overview

Definition:

The push() method of the Java Stack class pushes an item onto the top of the stack.

Syntax:

stack.push(E item);

Parameters:

- item: The item to be pushed onto the stack. This can be of any type that the stack holds.

Key Points:

- The method places the provided item on the top of the stack.

- After the operation, the pushed item becomes the topmost item of the stack.

- It returns the item argument itself, allowing for method chaining if needed.

- The method allows for dynamically growing the size of the stack. If the capacity of the underlying data structure (usually an array) is exhausted, it will increase.

- In the Java Stack class, the push operation is essentially implemented as an addition operation on the underlying data structure.

2. Stack push() Method Example

import java.util.Stack;

public class StackMethodExample {

    public static void main(String[] args) {
        pushMethod();
    }

    private static void pushMethod() {
        // creating stack
        Stack < String > stack = new Stack < > ();

        // populating stack
        stack.push("Java");
        stack.push("JEE");
        stack.push("C");
        stack.push("C++");
        stack.push("Spring");
        stack.push("Hibernate");

        // checking elements
        System.out.println("Elements in the stack: " + stack);
    }
}

Output:

Elements in the stack: [Java, JEE, C, C++, Spring, Hibernate]

Related Stack and Queue Class methods

Java Queue offer() example
Java Queue poll() example
Java Queue peek() example
Java Stack push() example
Java Stack pop() example
Java Stack peek() example
Java Stack search() example