Proper coding conventions required the first letter of the class start with a capital letter and the first letter of each additional word start with a capital letter.

Write a driver and fraction class that performs addition, multiplication, prints the fraction, and prints as a double. The driver class should contain this main method:. Note that this demonstration driver does not call the accessor methods. This method receives a Fraction parameter and adds the parameter fraction to the calling object fraction. This method receives a Fraction parameter and multiplies the parameter fraction by the calling object fraction.

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Hi, I'd like to do this project please.

Hi, I am expert at Java and can surely satisfy you. Please check your inbox. Hello, an expert Java programmer here and ready to start. Hello, we are experts in Java and can complete this task within an hour. Kindly check PMB. The email address is already associated with a Freelancer account. Enter your password below to link accounts:. I would like to see your. Basic Requirements Write a driver and fraction class that performs addition, multiplication, prints the fraction, and prints as a double.

This method prints the fraction as a double 0. Separate accessor methods for each instance variable in the Fraction class. Sample Output Enter numerator; then denominator.The calculation of your annuity is most important part of your investment, and everyone needs to calculate their annuity before doing investment. The Annuity Calculator helps the people a lot in the making of calculation of their investment annuity.

With the economies and technologies growing at a rapid pace, the need had been felt wide and across to have calculators that could perform all basic functions automatically and quickly. Learnt a great deal about amortization from your site.

Very useful and informative webpage indeed. I believe that in this age of equality and government monitoring we should have reached a point where everyone is treated the same and everyone is entitled to the same mortgage deal. Calculator is very useful for Trigonometry, Calculus, and advanced mathematics subjects. There are also other calculator that are best for specific purpose such as fraction calculator for solving fraction problems. Scientific calculator is also best for Chemistry, Physics, and engineering subjects.

Sunday, April 7, Fractions Calculator program. The FractionCalculator program is able to add, subtract, multiply, and divide two fractions. The program asks the user to choose one of the four operations and the two fractions.

## Decimal to Fraction

In this program, you will learn the following things about Java programming language: -creating class and objects, -defining class constructors, -defining class private data and public method members, -accessing class members, and -using switch case statement for multiple choice problem.

Add fractions" ; System. Subtract fractions" ; System. Multiply fractions" ; System. Program Output. Labels: calculatorfractionJava programsource code. Unknown July 15, at AM. Mueeid Khan October 29, at AM. The Blogger May 13, at AM. Sjaden July 15, at AM. Mia December 15, at AM. Tessie June 16, at PM.In this section, we will learn how to convert decimal to fraction.

Before proceeding to conversion, take a quick look at decimal and fraction. A decimal number is a number that has a decimal point. The decimal part separates the whole number and decimal part. It is a way to represent a fraction. It is not a whole number. For example, If a decimal number has any number of zeros after the decimal point, consider it as a whole number. Because zeros after decimal point do not affect the value. But In the above table, we have observed that when we move to the left of the decimal point the values get 10 times largerand moving to the right of decimal point the values get 10 times smaller.

A fraction represents the decimal number in the form of numerator and denominator, i. It is a way to express the decimal numbers. It is also known as a rational number. There are two types of fractions:. A fraction that is in the form of and numerator is greater than the denominator is called an improper fraction.

For example. A mixed fraction is a fraction that is in the form of a where, a is the whole number and is the fractional part. Step 1: Write down the decimal number which you want to convert, and divide it by 1.

Step 2: Remove the decimal point. To achieve the same, multiply the numerator and denominator by the same number. If there is one digit after the decimal point, multiply by If there are two digits after the decimal point, multiply by Similarly, if there are three digits after the decimal point, multiply byand so on.

Note: While simplifying the fraction remember that numerator and denominator must be divisible by the same number. Step 3: On simplifying the fractionwe get:. Hence, 0.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Code Review Stack Exchange is a question and answer site for peer programmer code reviews. It only takes a minute to sign up.

See the next iteration. Currently, you have a method that tests whether two given non-zero long values have the same sign with the following:. You don't need to have L suffix. It is guaranteed that the check will be done on long values due to binary numeric promotion. JLS section Otherwise, if either operand is of type longthe other is converted to long. You can simply check whether the fact that both numbers are greater than 0 is the same: if they are both greater or lower than 0 then the result will be true.

Note that both numbers can't be equal to 0 since that case was already handled. The biggest complication is your method to simplify a fraction. You currently have a complicated way with determining the prime factor when you can do it in a much simpler way.

Just calculate the greatest common divisor of both the numerator and the denominator. You are extending from Number which is serializable; this makes your class serializable also. As such, you should defined a serial version UID for your class. Do you intend to override that class in the future?

It doesn't look like a good idea to do it. I would make that class final to make it impossible, just like the built-in Integer or Long. Then you can create static factories to return Fraction instances instead of using the constructor directly.

Typically, this is done by introducing a method valueOf You can take inspiration from Integer. The constructor is then made private so that the caller needs to go through that method. Do you plan to extend this class? If not, I would mark it as final. Given its nature, inheritance can open a Pandora box. Did you test what happens for very large numbers?

All your tests use trivially small values, certainly not the ones that would warrant the use of long. Lagging constructors are a big no-no. I would aim for lazy evaluation here, or at least replace the constructor with a static method, with a name indicating it's triggering a process create, evaluate, convert?

Constructors should be fast as lightning. Indeed, did you test how it behaves for very large or very small values, nevermind the performance? What will happen if I multiply new Fraction Long.

What is supposed to happen?By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Code Review Stack Exchange is a question and answer site for peer programmer code reviews. It only takes a minute to sign up. I'd appreciate it if someone can look at this code and tell where I can improve this coding.

I'd also like to know about other validations best practices I can use or contribute on Github. You should use polymorphism and inheritance to use them better. You can make an abstract class for them. Also, you should make your unchangeable Fraction fields final. Also, the method Calculate should be named calculate to comply with the Java coding conventions.

This would also apply to methods such as DenominatorCannotBeZero.

All methods should start with lower-case letter. The same goes for Numerator and Denominator in your Fraction class.

As your Messages. Move the entire input code to this method, you could also let the method take care of the error-handling, this way you would only have to call:. Overall, I think you are overusing your Messagesor in one way underusing. You are using it to reduce code-duplication, and yet you still have code duplication.

Once you put the input for both inputNumerator and inputDenominator into your Messages classes, I would agree with the usage of it more. However, a method for new-line is a bit overkill IMO.

I personally would think it is more clear to actually print System. Instead of what I have done above, you could use a CalculationResult class to store the answer and let it have the displayAnswer method. Instead of creating the Calculation on one line and displaying it on the next and then never using that variable again, you can use this:.

A comment like this is completely overkill. Make your code as self-documenting as possible. The variable name addition tells you that it is addition.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. Im currently making a program with a bunch of methods. In this method it's about fractions.

The problem I'm having is that the answer has to be returned as a String. Can't get it to work. If the returned integer or fraction is 0, it should also be handled in a "nicer way".

Haven't figured it out by a long shot, but here is the little code I've come up with so far. Maybe it's easier to understand the problem. Thanks in advance! Note : I've made the assumption that both the numerator and denominator are positive and that the denominator is strictly positive.

You can do this by first calculating the greatest common divider. I "borrowed" my own method :.

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Demo : you can use this jDoodle. Learn more. How to use fraction in java Ask Question. Asked 4 years, 7 months ago. Active 4 years, 7 months ago. Viewed 7k times. William Nyqvister. William Nyqvister William Nyqvister 35 1 1 silver badge 3 3 bronze badges. Make some examples for input and what you would expect to returned. Think about the options you have to get the components of the answer. For example, integer division will give you the 1 in your example.

How can you go about getting the remainder? You know that you will need to be able to prime factor your numbers to simplify your fractions right? Also, what you could do is take the numerator and see how many times the denominator fits within it.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information.

I'm trying to work with fractions in Java. I want to implement arithmetic functions. For this, I will first require a way to normalize the functions. How can I achieve a common denominator with the least performance penalty? What algorithm is best for this? It keeps a BigInteger numerator and denominator, so it'll never overflow.

But it'll be a tad slow for a lot of operations that you know will never overflow. I've been dying to show this off somehow. Edit : Latest and greatest version of this code, including unit tests is now hosted on GitHub and also available via Maven Central.

I'm leaving my original code here so that this answer isn't just a link Apache Commons Math has had a Fraction class for quite some time. Most times the answer to, "Boy I wish Java had something like X in the core library!

Please make it an immutable type! The value of a fraction doesn't change - a half doesn't become a third, for example. Instead of setDenominator, you could have withDenominator which returns a new fraction which has the same numerator but the specified denominator. Overriding equals and hashcode would be sensible too, so it can be used in maps and sets. Outlaw Programmer's points about arithmetic operators and string formatting are good too. As a general guide, have a look at BigInteger and BigDecimal.

They're not doing the same thing, but they're similar enough to give you good ideas. You'll probably also want methods to add, subtract, etc. I will need to order them from smallest to largest, so eventually I will need to represent them as a double also. Not strictly necessary.

In fact if you want to handle equality correctly, don't rely on double to work properly. If there are negative integers involved, that can be handled appropriately The use of long here is to ensure there's not an overflow if you multiply two large int s.

I'm not sure what behavior you're looking for with zero denominator. Not sure how performance compares to using doubles to compare. Appears to work properly. One very minor improvement could potentially be to save the double value that you're computing so that you only compute it on the first access.

This won't be a big win unless you're accessing this number a lot, but it's not overly difficult to do, either. One additional point might be the error checking you do in the denominator Not sure if this is correct for your particular application, but in general if someone is trying to divide by 0, something is very wrong.

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