Create a calculator application in Java that accepts a mathematical problem via JOptionPane and displays the result using JOptionPane

Create a calculator application in Java that accepts a mathematical problem via JOptionPane and displays the result using JOptionPane

 Java JOptionPane calculator mathematical problem

Create a calculator application that accepts a mathematical problem via JOptionPane and  displays the result using JOptionPane.

For example, a user enters 23 + 42 =. The output would be 65.

Allow for the following operators, +, -, /, *. The preference of operations will be from left to right. This means that if a

user enters 6 – 4 * 2, the answer is 6 – 4=2 times 2 = 4. The answer would be 4.

Extra credit, 50pts if you design the program the accepts parenthesis. If a user enters 6 – (4 * 2) the answer is -2.

Continue to accept user input until the user enters 999

 

Analyzing this Java  problem

This program tests java swing library understanding and string formatting. It’s string formatting because JOptionPane accepts all inputs but returns a string.

Sample JOptionPane showInputDialog

 

Java calculator code that accepts input through JOptionPane.showInputDialog().

Open your IDE and write below code.

Output

mathematical problem via JOptionPane
Java Mathematical problem answer on Joptionpane



About the Author: Eric K

Kenyan Developer and Blogger with Interests in Java,Javascript,Node.js, Wordpress, Android, PHP and Making Money Online. Solving world problems through programming is my passion. Hire me: Email : kawi3462@gmail.com