Feb 12, 2015 · Even just add() might work, though that might be a bit misleading and lead someone reading your code to believe that all the method does is add two numbers, when really the core functionality is user interface. Redundancy: Any time you are copy-pasting code, alarm bells should go off in your head. You do this in multiple places.

I'm trying to create a basic calculator in Java. I'm quite new to programming so I'm trying to get used to it. import java.util.Scanner; import javax.swing.JOptionPane; public class javaCalculat...

Feb 4, 2016 · I am a newbie coder in Java and I am trying to make this calculator in java where a user can enter two numbers and select the operation to be done on those numbers. However when the code comes to selecting the operator it skips the user input and the if statement and directly implements the else statement.

Jul 20, 2015 · I am a beginner to Java and am learning about using methods. I want to make a simple calculator that uses methods effectively. I would like a review of my program, and I would also like to know if there is a better way or shortcuts to write this program better. I would like to know at the same time about good coding style.

Apr 29, 2010 · Firstly this is not a homework question. I am practicing my knowledge on java. I figured a good way to do this is to write a simple program without help. Unfortunately, my compiler is telling me er...

May 7, 2017 · As others have pointed out: the problem in your code is that you are a variable named scan that isn't defined in your source code. Thus the direct answer is to make scanner a field of your class and use that whenever you need to ask for user input (you have to avoid using more than one scanner on system. in btw).

Apr 30, 2015 · For the first case you could add setter methods like this: public void setFNum(double f) { fnum = f; } public void setSNum(double s) { snum = s; } Then in main, after getting a value from the user, set it using those methods.

Here is my code and someone please help me: REVISED revised, now it works with above but still has some trouble with LONG equations. A short example is that it solves 2 * 2 * 2 * 2 divided by 5 just fine but if change it so 10 - 2 * 2 * 2 * 2 divided by 5 I get wrong answer.

Sep 1, 2014 · We've been learning about methods in java (using netbeans) in class and I'm still a bit confused about using methods. One homework question basically asks to design a grade calculator using methods by prompting the user for a mark, the max mark possible, the weighting of that test and then producing a final score for that test. eg.

Jul 28, 2015 · Comments // Does stuff depending on what integer the user enters That is not a good comment. A comment should say why the code does something if it is not clear and the code should say what it does (if the code is unclear, you can use a comment, but this is also a signal you should write clearer code), this comment is just plain noise.