Java Stack push() example

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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] 

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