How to round a double to make money in java

Sign up using Facebook. Double and it’s primitive type double. Would it still be better to import it or no?? In Ad Tech, microdollars aren’t fine enough.

1. DecimalFormat

Goal of the program is to display the amount change owed with least coin. Problem: Output wrong cuz too many decimal places are subtracting value incorrectly. Really need to nake to 2 decimal places. Here is part of program so it can fit. I’ve been working on the program for about 5 hours straight and it is still not working correctly.

Programming tutorials, problems, solutions. Always with code.

Solution: Use Math. You can see how this works in the examples that follow, where the result is shown in the comment after each line:. Note that as a practical matter you may need to cast the Math. This is because Math. If the round method thinks it is receiving a float , it will return an int , so this works:. The first of these two examples works because I have explicitly given round a float when I wrote 2.

Constructing Patterns

Goal of the program is to display the amount change owed with least coin. Problem: Output wrong cuz too many decimal places are subtracting value incorrectly. Really need to round to 2 decimal places.

Here is part of program so it can fit. I’ve been working on the program for about 5 hours straight and it is still not working correctly. Can someone please make the proper edits for me. I am sure the changes needed are minor. I have tried making minor adjustments.

The solution is to just use int internally when working with money, knowing that the amount stored in the int is the number of pennies in the. Try DecimalFormat, a child of NumberFormat. I know I’ve used it before, but I don’t have it on me right. They actually make it easier in Java 1. Worst comest to worst, spend 15 minutes just writing out your own method, which is what I did before I found. Just make sure you heavily test it because otherwise you may get the decimal in weird places or not enough digits as in missing 0s and.

Trending News. Nancy Pelosi’s daughter raises Trump security issue. Jennifer Aniston blames ‘peer how to round a double to make money in java for decision. Was this the last, best shot for Aaron Rodgers?

Both sides cite dangers in run-up to Senate trial. Brady ready for ‘whatever the future may bring’. Tim Tebow marries former Miss Universe. Prince Harry and Meghan Markle make hard exit.

NBA player’s career in jeopardy after car crash. The Rock shares heartfelt posts about late father. Dressed to impress: Niners pick Super Bowl uniforms.

Update 2: I’ve been working on the program for about 5 hours straight and it is still not working correctly. I have tried making minor adjustments 2 lines: import java. This is an example of the incorrect output I am recieving. Enter total change that is owed. Scanner; import java. Answer Save. Scott S. Favorite Answer. Use this process Parse the input to a double. Still have questions? Get your answers by asking .

Trending News

You say the long represents 10 -6 or something and go from there not cents because you usually need a little more precision. That means, you cannot use it for further calculations. Become a Member Already a member? It allows to set Locale and specify number formatting parameters:. It’s really not too hard to write code doouble performs exceptionally fast on it. The DecimalFormat class has a format method that we need to. Good luck with BigDecimals. The next example demonstrates the DecimalFormatSymbols class by applying a strange format to a number.