Calculator method in java Create a simple calculator program in the Java programming language. This calculator will be able to perform fundamental arithmetic operations such as addition, subtraction, multiplication, and division. Scanner; public class Calculator { public static void main(String args[]) { float a, b, res; char select, ch; Scanner scan = new Scanner(System. We’ll also take the operator and operands as inputs and process the calculations based on them. print("(3) Multiplication\n Java calculator program - In this chapter of java programs tutorial, we will be creating a simple calculator program in java that would perform add, subtract, division and multiplication operations. Take two numbers as user input using the Scanner Class You need to write a testing class, that contains a main method. In Java, a class is simply an object which holds information. print("(1) Addition\n"); System. Java is a versatile and powerful programming language that allows developers to create a wide range of applications, from web applications to mobile apps and desktop software. And later we will also learn the way to write same program using menu driven approach. lang. All methods in Java must belong to a class. Here is a short and concise algorithm learning up to the implementation of code for the calculator program in java. System. methods used : In this page, we will learn to build a simple calculator application in java Step 1 : Create interface Calculation. The program takes the value of both the numbers (entered by user) and then user is asked to enter the operation (+, -, * and /), based on the input program performs the selected Oct 10, 2024 · This basic Java calculator program demonstrates how to use fundamental Java concepts like loops, conditionals, methods, and input handling. A method must be declared within a class. May 22, 2023 · We will be creating a basic calculator in java using the nested if/else statements which can perform operations like addition, subtraction, multiplication, division, and modulo of any two numbers. The objective of java calculator project is to demonstrate how to create a simple calculator using Java and the Swing library. 2) addition(a,b) method calls at the main method then that static method calculates the addition of two numbers and returns the value and value will be assigned to the variable c. Create an Array of Beer-Objects in that method with different alcohol content This easy-to-follow tutorial shows you how to create a simple calculator program in Java using code, switch statements, methods, and Swing components. Jun 4, 2022 · Given a number N and a power P, the task is to find the exponent of this number raised to the given power, i. Simple calculator program in Java using switch case and methods. The program structure allows the user to continuously perform calculations until they choose to exit, making it interactive and easy to extend with additional features. java package com. By iterating over your Beers, you can get the wanted results. e. Write a Java Program to create a Simple Calculator using a switch case and Else if statement. Methods are similar to functions and expose the behavior of objects. Feb 12, 2015 · I have made a basic calculator using methods. Java provides some pre-defined methods, such as System. javatrainingschool. We will be defining the numbers as an integer but if you want the decimal side of numbers as well feel Java program example for making a simple Calculator: import java. Feb 14, 2025 · In this tutorial, we’ll implement a Basic Calculator in Java supporting addition, subtraction, multiplication and division operations. Apr 12, 2023 · Conclusion. getInstance(). Examples: Input: N = 5, P = 2 Output: 25 Input: N = 2, P = 5 Output: 32 Below are the various ways to find NP: Method 1: Using Recursion Java Code // Java program to find the power of Mar 1, 2025 · Java program to implement calculator using JFrame/Swing With GUI – In this article, we will detail in on how to implement a calculator using Swing concept in Java programming along with detailed explanation of the source code. This can be done in 2 ways by using a switch case statement and by using swing API. util. We can call this method at the beginning and at the end of the function and by the difference we measure the time taken by the Oct 10, 2024 · This basic Java calculator program demonstrates how to use fundamental Java concepts like loops, conditionals, methods, and input handling. Having seen the dry run for a calculator program in java, it just might be clearer to understand the algorithm. nanoTime() and java. Get Started Now! Gathered all possible ways together into one place. May 15, 2020 · Because factorial grows so quickly, stack overflow is not an issue if you use recursion. in); do { System. . Mar 28, 2025 · Java Methods are blocks of code that perform a specific task. These methods return the current time in nanoseconds and milliseconds. About Java Calculator. In this article we will use Java Swing components to create a simple calculator with only +, -, /, * operations. Mar 19, 2019 · Building a Scientific Calculator in Java. A method allows us to reuse code, improving both efficiency and organization. Date. Look here to get information about how to set up a main method. sleep Declaring a Java Method. Apr 16, 2021 · Java Swing is an API for providing graphical user interface elements to Java Programs. getTime(); long d_StartTime = new Date(). println(), but you can also create your own methods to perform certain actions: W3Schools offers free online tutorials, references and exercises in all the major languages of the web. Next, we used the switch case to perform computations based on the given operator. By the end of java calculator project, you will have a solid understanding of how to create a basic calculator and have hands-on experience using the Swing library. The syntax to declare a method is: returnType methodName() { // method body } Here, returnType - It specifies what type of value a method returns For example if a method has an int return type then it returns an integer value. The first example allows entering two numeric values and the operator to perform calculations. Jan 12, 2020 · L ast time we talked about classes, objects, and attributes/member variables. Let's see the code of creating calculator in java. It is defined with the name of the method, followed by parentheses (). NP. Jan 3, 2023 · Algorithm for Calculator Program in Java. Prerequisites for Calculator Apr 30, 2024 · We can measure the time taken by a function in Java with the help of java. Date startDate = Calendar. In the main method you can create several Beer-Objects. service; public interface Calculation { public int addNumbers(int num1, int num2); public int subtractNumbers(int num1, int num2); public int multiplyNumbers(int num1, int num2); public int divideNumbers(int num1, int num2) throws In this program, you'll learn to make a simple calculator using switch. Scanner; In this tutorial, we will walk through the process of building a basic calculator application using Java. We compared a class to a schema of a TV and an object to an actual TV. Example: [GFGTABS] Java // Creating a method // Sep 10, 2017 · In this Program we are making a simple calculator that performs addition, subtraction, multiplication and division based on the user input. So the following method will either calculate factorial(n) or throw an IllegalArgumentException if n is too big. Oct 27, 2011 · Global variables don't exist in Java. This calculator would be able to add, subtract, multiply and divide two numbers. In our case, the object we're building is a calculator so we have named it as such. Start off by declaring a public Calculator class and then inside of it, a main method, exactly like shown in the picture. This is my first attempt at using methods and would like to see if I can improve on this as there is a lot of repeated code. Calculator in Java with Source Code: We can develop calculator in java with the help of AWT/Swing with event handling. Learn to code solving problems and writing code with our hands-on Java course. We also wrote a TV class that contained various Mar 3, 2025 · Addition(Using Static Method) 1) addition(int x, int y) is the static method, which calculates the addition of two numbers and returns the value. The method used in this article is as follow: Using JFrame As we all know, calculators are the Calculator in Java with Source Code. import java. Create a Method. Java Calculator is used to calculating operations like addition, subtraction, division, multiplication, modulus, and power. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more. case in Java. Rather than the method updating some variable, the method should just return the result of the computation, and the caller should be responsible of using the result as he wants to: Learn how to build a scientific calculator in Java using Swing components and switch statements in this step-by-step tutorial. out. print("(2) Subtraction\n"); System. In fact, the value of 20! is the largest one can represent in a Java long. currentTimeMills() methods. And this is not how it should be done. Swing was created to provide more powerful and flexible components than Java AWT (Abstract Window Toolkit). getTime(); Thread. pbdqf accs dyar wepudn bonnhd aiiqy qxldi jkpw pjem iwoki xggejjuiq hrzrm eiuf ywqg dpt