In this article we will use Java Swing components to create a simple calculator with only +, -, /, operations. Anyone can perform the basic operations in the calculator, i.e add, subtract, multiply, divide. Java Swing is an API for providing graphical user interface elements to Java Programs.Swing was created to provide more powerful and flexible components than Java AWT (Abstract Window Toolkit). Here in this program we will create a console based calculator. Below are some of the most common math operations in Java that you should be familiar with. Calculator : Console Based Java Program A calculator is a small, portable, often inexpensive electronic device used to perform both basic and complex operations of arithmetic.
zip format and has commented instructions all through out the code so you will understand everything. I have designed a simple console calculator as follows but i need to create a loop where I can re run the program: So that I won't need to run the program again and again and it can take the input from the user and run by itself.
A small useful calculator that gives beginners and idea of how to make a calculator. Functional Java console calculator for beginners.
2) Start a function declaration with the keyword function. Download Advanced Java Console Calculator for free.
(They have no content, hence no innerHTML. After calculating Mortgage value will be stored in variable principal. Things to fix: 1) Assign to value, not innerHTML, when referring to an input element. Then, the switch statement executes cases based on the user input. Initiating a calculation in Java is easy as the most common calculation methods are available by default in Java. Here we will to use following formula principal (p r) / (1 Math.pow (1 + r, -t)) and Math.pow () function which is define in Java standard will take two parameter as a arguments p,r and t values supply to it. In above program, the user is asked to enter either +, -, * or /, and two numbers. if.else if.if statement is used to check the condition that the user has entered for the operator. The corresponding operation is performed and the output is displayed.Įxample 2: Simple Calculator with switch // program for a simple calculatorĬonst operator = prompt('Enter operator ( either +, -, * or / ): ') Ĭonst number1 = parseFloat(prompt('Enter first number: ')) Ĭonst number2 = parseFloat(prompt('Enter second number: ')) Ĭonsole.log(`$`)
This is my revised code of the Calculator: import java.math.* The Calculator Application Learning Objectives The development process of the Calculator application will aid the students to: Create a simple Java console application Understand the object-oriented concepts of inheritance, polymorphism and data hiding Create application which request input from users, validate, process the input received and provide desired output.