Calculator Java Program With Source Code

The Calculator Java Program is a desktop application which can calculate the four basic operation such as addition, multiplication, division, and subtraction.

Further, you will learn to construct a simple calculator using switch case in Java. This calculator would be able to add, subtract, multiply and divide two numbers.

It is recommended that you are familiar with the following areas of Java programming if you wish to comprehend this example:

The switch Statement in Java
Java Scanner Class

Example Program

You can download calculator program in java using switch case in download project button below to access ALL the free source code!


package calculator_java_program;

import java.util.Scanner;

public class Calculator_Java_Program {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        char operator;
        Double number1, number2, result;

        // create an object of Scanner class
        Scanner input = new Scanner(System.in);

        // ask users to enter operator
        System.out.println("Choose an operator: +, -, *, or /");
        operator = input.next().charAt(0);

        // ask users to enter numbers
        System.out.println("Enter first number");
        number1 = input.nextDouble();

        System.out.println("Enter second number");
        number2 = input.nextDouble();

        switch (operator) {

            // performs addition between numbers
            case '+':
                result = number1 + number2;
                System.out.println(number1 + " + " + number2 + " = " + result);
                break;

            // performs subtraction between numbers
            case '-':
                result = number1 - number2;
                System.out.println(number1 + " - " + number2 + " = " + result);
                break;

            // performs multiplication between numbers
            case '*':
                result = number1 * number2;
                System.out.println(number1 + " * " + number2 + " = " + result);
                break;

            // performs division between numbers
            case '/':
                result = number1 / number2;
                System.out.println(number1 + " / " + number2 + " = " + result);
                break;

            default:
                System.out.println("Invalid operator!");
                break;
        }

        input.close();
    }

}

Output

Importance of java program for calculator?

Importance of java program for calculator

A calculator is a portable electronic tool that can do a wide variety of mathematical operations, including addition, subtraction, multiplication, division, percentage calculations, and many more. Our computations are facilitated and sped up as a result. It is a hand-held device that can be used practically anywhere to carry out a variety of straightforward mathematical calculations.

About the Project

Programming in Java 8 using object-oriented techniques Programming. A simple calculator may do operations such as adding, subtracting, multiplying, and dividing two numbers. This is accomplished with the help of a switch case. The following is an example of a program that proves this point:

This project is build using java alone The following java project covers all of the required and vital elements that can be used for college projects by first-year, second-year, and final-year IT students.

Project Details and Technology

Project Name:	Calculator Java Program with Source Code
Abstract	When it comes to the programming of the calculator, this program to build calculator makes use of the integrated development environment (IDE) known as NetBeans.
Language/s Used:	Java
Java version (Recommended):	8
IDE Used:	NetBeans 11.2
Type:	Desktop Application
Developer:	sourcecodehero
Updates:	0

Procedure to run the system

Time needed: 3 minutes.

Step 1: Download Source Code
To get started, find the downloaded source code file below and click to start downloading it.
Step 2: Extract File
Navigate to the file’s location when you’ve finished downloading it and right-click it to extract it.
Step 3: Run the project
Next, open NetBeans IDE and click open project and choose your download.
Step 4: Run the project.
Next, right click the project folder and click run.

Download Source Code below

Download

Summary

For those Desktop developers interested in learning more about desktop apps, this system is a fully functional project.

Inquiries

If you have any questions or comments on the project, please leave a comment below.