CalculatorApp | Basic Calculator using Java | Apps library

 by   hollynicolemills Java Version: Current License: GPL-2.0

kandi X-RAY | CalculatorApp Summary

kandi X-RAY | CalculatorApp Summary

CalculatorApp is a Java library typically used in Apps, Spring applications. CalculatorApp has no bugs, it has a Strong Copyleft License and it has low support. However CalculatorApp has 1 vulnerabilities and it build file is not available. You can download it from GitHub.

Basic Calculator using Java Swing. Utilizes order of operations to properly evaluate expressions.

            kandi-support Support

              CalculatorApp has a low active ecosystem.
              It has 4 star(s) with 9 fork(s). There are 1 watchers for this library.
              It had no major release in the last 6 months.
              There are 0 open issues and 1 have been closed. On average issues are closed in 1 days. There are 2 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of CalculatorApp is current.

            kandi-Quality Quality

              CalculatorApp has no bugs reported.

            kandi-Security Security

              CalculatorApp has 1 vulnerability issues reported (0 critical, 0 high, 1 medium, 0 low).

            kandi-License License

              CalculatorApp is licensed under the GPL-2.0 License. This license is Strong Copyleft.
              Strong Copyleft licenses enforce sharing, and you can use them when creating open source projects.

            kandi-Reuse Reuse

              CalculatorApp releases are not available. You will need to build from source code and install.
              CalculatorApp has no build file. You will be need to create the build yourself to build the component from source.

            Top functions reviewed by kandi - BETA

            kandi has reviewed CalculatorApp and discovered the below as its top functions. This is intended to give you an instant insight into CalculatorApp implemented functionality, and help decide if they suit your requirements.
            • Reads an input
            • Returns true if the given string is a valid number
            • Checks if two strings have a precedence
            • Evaluates the operation
            • Checks that the input is valid
            • Returns true if the given string is an operator
            • The main method
            • Start the menu
            Get all kandi verified functions for this library.

            CalculatorApp Key Features

            No Key Features are available at this moment for CalculatorApp.

            CalculatorApp Examples and Code Snippets

            No Code Snippets are available at this moment for CalculatorApp.

            Community Discussions


            Trying to change text on button in Python .kv file
            Asked 2020-Mar-12 at 03:22

            I am trying to teach myself Python Kivy and I have been working with this calculator program. I want to make the text for exponent different than what it being processed. It is normally ** but I want it to show ^ on the button. How do I get it show one thing and put in a different thing in the entry.text += self.text part. The other way I was thinking was trying to use a decorator, but I am not sure how to do that for an operator like that.

            Any ideas?




            Answered 2020-Mar-12 at 03:22

            if I understood, this will resolve:



            i have three text fields, want to choose between first two of them, & work with third one, how to do it please guide
            Asked 2020-Feb-06 at 12:35
            import 'package:flutter/material.dart';
            void main() => runApp(new CalculatorApp());
            class CalculatorApp extends StatelessWidget {
              Widget build(BuildContext context) {
                return MaterialApp(title:'Bending Calculator',
                  home: Calculator()
            class Calculator extends StatefulWidget {
              State createState() => Calculatore();
            class Calculatore extends State {
            final a = TextEditingController();
              final b = TextEditingController();
              final c = TextEditingController();
            // controller mentioned
             String total= "";
            void calculate()  {
                int numberA = int.parse(a.text);
                int numberB = int.parse(b.text);
                int numberC = int.parse(c.text);
                int  result;
            // if numberA have value then answer will be a+c
            // what condition to do here for between choosing between  textfields a or b.
            // i tried numberB ==null   that does not work
            // very much confused, no idea what to do please help
            result = numberA + numberC
            } else{ result = numberB + numberC
                setState(() {
                  total = "$result";
              Widget build(BuildContext context) {
            return Scaffold(appBar: AppBar(title:Text("Calculator")),
                    body: SafeArea(
                        child: ListView(
                          children: [
                            Row( mainAxisAlignment: ,
                              children: [


            Answered 2020-Feb-06 at 11:52

            As I understand you have tried checking whether the value of text field b is null. Have you tried to check whether b.text.isEmpty or isNotEmpty.



            Looking for advice on my unit test case logic c# console application
            Asked 2020-Jan-03 at 21:43

            I sort of just wanted to have my code reviewed for logical purposes. I think it works out the way I expect it to but I'd like to double check with peers who are more versed in C#.

            So here I am testing a console application which validates user input. I am using StringReader to simulate the user response. So I entered in 5 as my response and if my response is not a valid float then I should receive an error.

            I tested this against a non-float value and my for loop caused me to enter a insufficient memory exception which makes sense. But for some reason in my test, I feel like I'm writing to my Input1() function and just validating that my input was indeed the value that i simulated? Or is my test actually validating that the return value of Input1() is actually num1 in the form of a float - thus passing my validation?

            Sorry if this is overkill and not making sense.



            Answered 2020-Jan-03 at 21:43

            Ok, so there are a few points to your question. First, let's clean up the code a bit:



            NUnit3TestExecutor converting tests but is not running them
            Asked 2020-Jan-03 at 02:43

            Trying to get my unit test to run but after clicking "run tests", I just get "NUnit3TestExecutor converted 1 of 1 NUnit test cases" in my output. The test tries to run but just ends up loading forever till I have to manually cancel the process. Any idea what could be causing this?



            Answered 2020-Jan-03 at 02:43

            Based on your use of Console.SetOut I'm assuming you are testing a console program. I'm also assuming that it waits for input from the user.

            Unfortunately, it is not getting any input from your code, so it hangs.

            Testing a console app by driving it's input and output is possible but complicated. You would usually need to launch it in a separate process, monitor the standard and error outputs and drive the input. Most people do not test this way - at least not those experienced with unit testing.

            A better approach is to test the backend that does your calculations.

            There's one other complication I should mention... NUnit itself takes control of console output. For that reason, your test would need to save the current output setting and restore it before exiting - otherwise, NUnit's continued processing will be broken.



            First console application returning with unexpected output
            Asked 2019-Dec-30 at 20:58

            When I run this console app, everything works fine but except for my UserAnswer() result. It keeps returning a value of '0' for both num1 & num2. This doesn't make sense to me because I don't receive any errors for declaring a new value for num1 & num2 in Input1() & Input2() methods. It compiles and runs fine but why is it not picking up the new values of these variables?



            Answered 2019-Dec-30 at 20:58


            getting infinite loop in c# - calculator app beginner
            Asked 2019-Dec-27 at 01:39

            I am getting the infinite loop on my last while loop where it states: while (Valid3 == false)... I expect to receive the console.writeline("invalid input please try again"), until the user satisfies the argument but instead when i enter an invalid input i receive infinite loop. Though i feel the logic im using here is the same as the logic in the loops used beforehand. Below is all my code.



            Answered 2019-Dec-26 at 18:35

            move your Console.ReadLine() inside your while loop



            Why is my ReactRedux.connect statement not working?
            Asked 2019-Sep-24 at 22:55

            I am writing a calculator app as a project for FreeCodeCamp. I have decided to write it using React and Redux. I've written the Redux part of the app, and I started to connect Redux to React.

            When I wrote all the code to connect Redux to my React app, the rendering stopped working. I used different console.log() statements to track down where the JavaScript was choking, and I narrowed it down to the connect statement found on line 241 of the linked Codepen. If you comment out line 242, and replace line 255 with ReactDOM.render(, wrapper); the app renders. However, the same code running on FreeCodeCamp's platform appears to work.

            Here is the link to my CodePen: JavaScript Calculator.

            The challenge I used on FreeCodeCamp to test my code can be found here: FCC Challenge

            The exact code I adapted from FCC (in order to get the editor to render my component) is below. You can see the changes I made from the Pen are only in the rendering part of the code.



            Answered 2019-Sep-24 at 22:55

            Because the order in which you import external scripts matters. Put redux below react because react-redux requires React to be present in the global scope.

            Correct order is:

            1. react
            2. react-dom
            3. redux
            4. react-redux



            Tkinter.pack() method doesn't show GUI
            Asked 2019-Sep-21 at 15:21

            I try to get familiar with python GUI, so in order to do so I'm building a simple calculator. Most of it works, but I'm trying to add a scrollbar to my text display widget, when I use the following piece of code:



            Answered 2019-Sep-21 at 15:21

            Indeed, the geometry manager cannot mix pack and grid in the same section. So you have to choose one mode to organize the layout of the window, or split the window into 2 frames to be able to pack widgets in one and grid in the other.

            You can try with the following :



            Kivy: Can't add button from python code "AttrErr: 'super' object has no attribute '__getattr__"
            Asked 2019-Jul-20 at 10:17

            I know this question was asked multiple times but those solutions didnt help me, or i really dont get it.

            I want to add numeric buttons with the help of python "for loop", but when i do it i get the following error:

            "self.ids.GoodsContainer.add_widget(Button(text="hi")) File "kivy\properties.pyx", line 863, in AttributeError: 'super' object has no attribute 'getattr'"

            I am stuck here for a very long time.

            Whenever i delete the button part in the 'GoodsView()' (python file) the porgram runs perfectly. So i could just type the numbers myself in "kv rule" but later i want to add labels which are generated by functions so i need to find a way now or later i will have more problems.




            Answered 2019-Jul-20 at 10:17

            The problem is that the ids dictionary isn't yet populated during __init__, because all the other widgets haven't been created and added to one another yet.

            Try doing something like



            Kivy: Why does it show "Unknown class" when i have already identified all classes
            Asked 2019-Jul-18 at 15:58

            This question already exists on stackoverflow but the solutions for them didnt worked for me.

            Based on what i read online this error occurs, when there is an unidentified child widget in the kv file, but i have already identified all my widgets in the 'py' file

            I have tried moving down the "Builder.load_file" (by down i mean after the class-es) and it worked properly, but then i couldnt bind widgets with functions, it showed some other error. So this was not a permanent solution.

            important parts of my 'py' and 'kv' files




            Answered 2019-Jul-18 at 15:58

            You are getting the error, kivy.factory.FactoryException: Unknown class because in the kv file, when it is creating the root it tries to instantiate the child, Manager: object but it could not find the implementation of class Manager() before the Builder.load_file() function.

            1. Remove kv = Builder.load_file("pcapp.kv")
            2. Replace return kv with return Builder.load_file("pcapp.kv")


            Community Discussions, Code Snippets contain sources that include Stack Exchange Network


            No vulnerabilities reported

            Install CalculatorApp

            You can download it from GitHub.
            You can use CalculatorApp like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the CalculatorApp component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer For Gradle installation, please refer .


            For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .
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