Java what type for currency

JodaStephen Buhake Sindi Buhake Sindi 84k 27 27 gold badges silver badges bronze badges. Why can't we use float or double instead? Borat Sagdiyev This is the reason why. Also, you can refer to this. Borat: you can if you know what you're doing, see this article by Peter Lawrey. You can then use the API: package com. Locale; import javax. Monetary; import javax. MonetaryAmount; import javax. MonetaryRounding; import javax. MonetaryAmountFormat; import javax. MonetaryFormats; import org.

Line 1, 3 3 gold badges 14 14 silver badges 36 36 bronze badges. Abdull Abdull What about serialization and saving into db? What format should be used for sending over wire? I believe that Oracle dediced againts including Java Money in Java 9. Really a shame. But great answer. We still can use it with Maven — borjab. Do you have a source for Oracle deciding against including Java Money in Java 9? I don't have a source from Oracle, but there is some info here: stackoverflow. Eric Leschinski k 86 86 gold badges silver badges bronze badges.

Bear in mind that the amount of money can overflow the size of int — eversor. This does not even take account of currencies like yen with large exchange rates to the dollar. Integer types may be best to avoid rounding problems although they get messy with interest and exchange rate calculations.

However, depending on the application, you may need a bit integer type. Ideally microdollars, actually, as then if you do e. This is especially important if you're doing a lot of calculations in a row before your user sees the result, as the rounding errors will compound. Show 1 more comment. Community Bot 1 1 1 silver badge.

Phil Parsons Phil Parsons 2, 20 20 silver badges 15 15 bronze badges. All specification classes and interfaces are located in the javax. Afee Afee 2, 26 26 silver badges 33 33 bronze badges. NumberFormat class is designed specifically for this purpose. Lets see this in action. BigDecimal String constructor should always be preferred over BigDecimal Double , because using BigDecimal double is unpredictable due to inability of the double to represent 0.

If double must be used for initializing a BigDecimal, use BigDecimal. On February 25, , a loss of significance in a MIM Patriot missile battery prevented it from intercepting an incoming Scud missile in Dhahran, Saudi Arabia, contributing to the death of 28 soldiers from the U.

This method rounds the ideal infinitely precise result of an arithmetic operation to the nearest representable value, and gives that representation as the result.

In the case of a tie, the value that would make the significand end in an even digit is chosen. Most of these questions has been answered in my eBook "Cracking the Core Java Interview" updated on June , that you can buy from this link:. If precision is one of your requirements, use BigDecimal instead.

Real cause of loss of significance Floating-point arithmetic. BigDecimal for the rescue BigDecimal represents a signed decimal number of arbitrary precision with an associated scale. Some precautions BigDecimal String constructor should always be preferred over BigDecimal Double , because using BigDecimal double is unpredictable due to inability of the double to represent 0.

Do you know? Data type specifies the size and type of values that can be stored in an identifier. The Java language is rich in its data types. Non-primitive—which include Classes, Interfaces, and Arrays. What is decimal in Java? Decimal Numbers in Java Java provides two primitive types that can be used for storing decimal numbers: float and double. For that, and also for rounding, we can use the BigDecimal class. How do I use BigDecimal? What is BigDecimal in Java?

BigDecimal Class in Java. The BigDecimal class provides operations on double numbers for arithmetic, scale handling, rounding, comparison, format conversion and hashing. It can handle very large and very small floating point numbers with great precision but compensating with the time complexity a bit.

What are the 8 primitive data types in Java? Primitive types are the most basic data types available within the Java language. There are 8: boolean , byte , char , short , int , long , float and double. These types serve as the building blocks of data manipulation in Java. Such types serve only one purpose — containing pure, simple values of a kind.

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