til that for java's BigDecimal type, 1.0 /= 1 if you use .equals...
January 21, 2025 at 8:57 PM
til that for java's BigDecimal type, 1.0 /= 1 if you use .equals...
This is what happens if you use floating point numbers (int, double in #Java) for financial data.
Use decimal numbers (BigDecimal in Java) instead.
Use decimal numbers (BigDecimal in Java) instead.
June 15, 2025 at 10:25 AM
This is what happens if you use floating point numbers (int, double in #Java) for financial data.
Use decimal numbers (BigDecimal in Java) instead.
Use decimal numbers (BigDecimal in Java) instead.
'Never use double for money' is dogma, not engineering.
@stefanofago.bsky.social breaks down when double, BigDecimal, or fixed-point is the right call, and the production traps that quietly undo each one.
#java #deepdive
@stefanofago.bsky.social breaks down when double, BigDecimal, or fixed-point is the right call, and the production traps that quietly undo each one.
#java #deepdive
double, BigDecimal, or Fixed-Point?
There is an evergreen debate in the Java world: should you always use BigDecimal for money? The short answer is no. The real answer is: it depends on your computational context: the precision you ne...
blog.frankel.ch
June 14, 2026 at 5:07 PM
'Never use double for money' is dogma, not engineering.
@stefanofago.bsky.social breaks down when double, BigDecimal, or fixed-point is the right call, and the production traps that quietly undo each one.
#java #deepdive
@stefanofago.bsky.social breaks down when double, BigDecimal, or fixed-point is the right call, and the production traps that quietly undo each one.
#java #deepdive
BigDecimal do Javinha resolve todos os problemas………
October 2, 2024 at 10:42 PM
BigDecimal do Javinha resolve todos os problemas………
Ich hätte mir ein Programm mit BigInteger und BigDecimal schreiben können, aber nach kurzer Überlegung dachte ich mir so: Nö.
December 24, 2024 at 3:33 PM
Ich hätte mir ein Programm mit BigInteger und BigDecimal schreiben können, aber nach kurzer Überlegung dachte ich mir so: Nö.
よし！イベPの丸め誤差を検証するためにまず丸め誤差が絶対起きないBigDecimalを用いた計算・逆算プログラムがつくれたぞ！
May 22, 2025 at 5:17 AM
よし！イベPの丸め誤差を検証するためにまず丸め誤差が絶対起きないBigDecimalを用いた計算・逆算プログラムがつくれたぞ！
New post from Stefano Fago on choosing the right numeric types in Java. Should you use double, BigDecimal, or fixed-point arithmetic? Get practical guidance on precision vs performance tradeoffs.
foojay.io/today/double...
#Java #Programming
foojay.io/today/double...
#Java #Programming
double, BigDecimal, or Fixed-Point? Precision, Performance, and Sane Choices for Numbers in Java - foojay
There is an evergreen debate in the Java world: Should you always use MARKDOWN_HASHeb731dbabfc7392f8ad8c1cdb326a26aMARKDOWNHASH for money? The short - by Stefano Fago
foojay.io
June 24, 2026 at 1:23 PM
New post from Stefano Fago on choosing the right numeric types in Java. Should you use double, BigDecimal, or fixed-point arithmetic? Get practical guidance on precision vs performance tradeoffs.
foojay.io/today/double...
#Java #Programming
foojay.io/today/double...
#Java #Programming
Episode 342 - Bun en Rust, TypeScript en Go #Bun #Rust #TypeScript #ClaudeCode #Java #COBOL #BDD #JakartaEE #BigDecimal sur https://youtube.com/watch?v=XZAffYHgdkg et en podcast https://lescastcodeurs.com/2026/07/21/lcc-342-bun-en-rust-typescript-en-go/
July 21, 2026 at 9:56 AM
Episode 342 - Bun en Rust, TypeScript en Go #Bun #Rust #TypeScript #ClaudeCode #Java #COBOL #BDD #JakartaEE #BigDecimal sur https://youtube.com/watch?v=XZAffYHgdkg et en podcast https://lescastcodeurs.com/2026/07/21/lcc-342-bun-en-rust-typescript-en-go/
Added an AI-Generated Simulation for calculations per second for BigDecimal and double.
Why double Still Outperforms BigDecimal: A Decade-Long Performance Comparison
Overview Many developers consider BigDecimal the go-to solution for handling money in Java. They often claim that replacing double w...
buff.ly
December 20, 2024 at 3:18 PM
Added an AI-Generated Simulation for calculations per second for BigDecimal and double.
While double can be much faster than BigDecimal, that doesn't matter if the results aren't correct. In this benchmark, I also ensured the results were the same.
TY Ken Fogel
https://buff.ly/4fJMxqW
TY Ken Fogel
https://buff.ly/4fJMxqW
November 26, 2024 at 12:05 PM
While double can be much faster than BigDecimal, that doesn't matter if the results aren't correct. In this benchmark, I also ensured the results were the same.
TY Ken Fogel
https://buff.ly/4fJMxqW
TY Ken Fogel
https://buff.ly/4fJMxqW
📦 ez-php/bignum 2.5.2
Arbitrary-precision integer and decimal arithmetic for the ez-php ecosystem — immutable BigInteger and BigDecimal value objects backed by bcmath (gmp optional)
🔗 https://github.com/ez-php/bignum
Arbitrary-precision integer and decimal arithmetic for the ez-php ecosystem — immutable BigInteger and BigDecimal value objects backed by bcmath (gmp optional)
🔗 https://github.com/ez-php/bignum
September 26, 2026 at 2:29 AM
📦 ez-php/bignum 2.5.2
Arbitrary-precision integer and decimal arithmetic for the ez-php ecosystem — immutable BigInteger and BigDecimal value objects backed by bcmath (gmp optional)
🔗 https://github.com/ez-php/bignum
Arbitrary-precision integer and decimal arithmetic for the ez-php ecosystem — immutable BigInteger and BigDecimal value objects backed by bcmath (gmp optional)
🔗 https://github.com/ez-php/bignum
Nossa, cara, eu lembro do trabalho que eu tive pra transformar uma codebase de double pra BigDecimal justamente por conta de um problema de arredondamento
May 22, 2025 at 4:10 PM
Nossa, cara, eu lembro do trabalho que eu tive pra transformar uma codebase de double pra BigDecimal justamente por conta de um problema de arredondamento
📦 ez-php/bignum 2.5.4
Arbitrary-precision integer and decimal arithmetic for the ez-php ecosystem — immutable BigInteger and BigDecimal value objects backed by bcmath (gmp optional)
🔗 https://github.com/ez-php/bignum
Arbitrary-precision integer and decimal arithmetic for the ez-php ecosystem — immutable BigInteger and BigDecimal value objects backed by bcmath (gmp optional)
🔗 https://github.com/ez-php/bignum
September 26, 2026 at 2:59 AM
📦 ez-php/bignum 2.5.4
Arbitrary-precision integer and decimal arithmetic for the ez-php ecosystem — immutable BigInteger and BigDecimal value objects backed by bcmath (gmp optional)
🔗 https://github.com/ez-php/bignum
Arbitrary-precision integer and decimal arithmetic for the ez-php ecosystem — immutable BigInteger and BigDecimal value objects backed by bcmath (gmp optional)
🔗 https://github.com/ez-php/bignum
JDKバージョンとBigDecimalの挙動について - RAKUS Developers Blog | ラクス エンジニアブログ
https://tech-blog.rakus.co.jp/entry/20240705/bigdecimal
https://tech-blog.rakus.co.jp/entry/20240705/bigdecimal
JDKバージョンとBigDecimalの挙動について - RAKUS Developers Blog | ラクス エンジニアブログ
BigDecimalの値保持について BigDecimalから値の抽出 誤った表記変換方法 正しい文字列を取得する方法 まとめ お金の計算など正確にJavaで計算をするうえで欠かせないBigDecimalですが、 一部JDKバージョンで挙動に変更が入っていました。 この改修により問題に直面してしまったため備忘録がてら挙動をまとめることにしました。
tech-blog.rakus.co.jp
July 5, 2024 at 6:35 AM
JDKバージョンとBigDecimalの挙動について - RAKUS Developers Blog | ラクス エンジニアブログ
https://tech-blog.rakus.co.jp/entry/20240705/bigdecimal
https://tech-blog.rakus.co.jp/entry/20240705/bigdecimal
apparently it's because they can't always be substituted?
stackoverflow.com/questions/14...
stackoverflow.com/questions/14...
Why is BigDecimal.equals specified to compare both value and scale individually?
This is not a question about how to compare two BigDecimal objects - I know that you can use compareTo instead of equals to do that, since equals is documented as:
Unlike compareTo, this method
stackoverflow.com
January 21, 2025 at 9:21 PM
apparently it's because they can't always be substituted?
stackoverflow.com/questions/14...
stackoverflow.com/questions/14...
O BigDecimal suporta String como parâmetro
a cartoon character from the emperor 's new groove is making an ok sign with his hands .
ALT: a cartoon character from the emperor 's new groove is making an ok sign with his hands .
media.tenor.com
May 22, 2025 at 4:22 PM
O BigDecimal suporta String como parâmetro
Eu esqueci como fazer operações com o BigDecimal do Java num live coding.
Quando acertava o código, não conseguia explicar ao mesmo tempo em que digitava.
Pensamentos são mais rápidos que falas — talvez porque pensamos em conceitos, não em palavras.
Quando acertava o código, não conseguia explicar ao mesmo tempo em que digitava.
Pensamentos são mais rápidos que falas — talvez porque pensamos em conceitos, não em palavras.
Apoio. Leet code é tão decoreba. Eu acho chato pq sou uma pessoa ansiosa e travo se ficar sob pressão. Imagina codar sem poder errar?
September 5, 2024 at 1:29 AM
Eu esqueci como fazer operações com o BigDecimal do Java num live coding.
Quando acertava o código, não conseguia explicar ao mesmo tempo em que digitava.
Pensamentos são mais rápidos que falas — talvez porque pensamos em conceitos, não em palavras.
Quando acertava o código, não conseguia explicar ao mesmo tempo em que digitava.
Pensamentos são mais rápidos que falas — talvez porque pensamos em conceitos, não em palavras.
For float/double they had an extra option that's unavailable for BigDecimal. That's why ArrayList.indexOf works for signed zeroes.
bsky.app/profile/mvsa...
bsky.app/profile/mvsa...
Hmm. Yeah, I guess for double/Double they could differentiate between boxed (probably generic) uses of comparison and unboxed (probably arithmetic) uses.
But that's not an option for BigDecimal.
But that's not an option for BigDecimal.
![Screenshot of interactive shell session. Text follows:
| Welcome to JShell -- Version 21.0.4
| For an introduction type: /help intro
jshell> import java.util.*
jshell> Set<Double> ds = new HashSet<>();
ds ==> []
jshell> ds.add(-0.0);
$3 ==> true
jshell> ds.add(+0.0);
$4 ==> true
jshell> ds
ds ==> [-0.0, 0.0]
jshell> Set<Double>ts = new TreeSet<Double>();
ts ==> []
jshell> ts.add(-0.0);
$7 ==> true
jshell> ts.add(+0.0);
$8 ==> true
jshell> ts
ts ==> [-0.0, 0.0]
jshell> Double.valueOf(-0.0).compareTo(+0.0)
$10 ==> -1](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:xnx52zdoyuf777kntfughiwa/bafkreihheulpq2croiwzron53kl6els32qq2hg6mjwlnpukjbba7swqdr4)
January 21, 2025 at 9:46 PM
For float/double they had an extra option that's unavailable for BigDecimal. That's why ArrayList.indexOf works for signed zeroes.
bsky.app/profile/mvsa...
bsky.app/profile/mvsa...
In Java unterscheidest du grob zwischen primitiven Datentypen und Referenztypen. Primitive Typen sind die Bas...
https://magicmarcy.de/datentypen-in-java-ohne-stolperfallen
#DAtentypen #Java #Stolperfallen #2038 #Overflow #int #Integer #String #float #double #BigDecimal #Wertebereiche #Programming
https://magicmarcy.de/datentypen-in-java-ohne-stolperfallen
#DAtentypen #Java #Stolperfallen #2038 #Overflow #int #Integer #String #float #double #BigDecimal #Wertebereiche #Programming
April 26, 2026 at 4:42 PM
In Java unterscheidest du grob zwischen primitiven Datentypen und Referenztypen. Primitive Typen sind die Bas...
https://magicmarcy.de/datentypen-in-java-ohne-stolperfallen
#DAtentypen #Java #Stolperfallen #2038 #Overflow #int #Integer #String #float #double #BigDecimal #Wertebereiche #Programming
https://magicmarcy.de/datentypen-in-java-ohne-stolperfallen
#DAtentypen #Java #Stolperfallen #2038 #Overflow #int #Integer #String #float #double #BigDecimal #Wertebereiche #Programming
Reminded that `BigDecimal` accepts non-ASCII numbers, while `Double` does not:
jshell> new BigDecimal("１２３")
$194 ==> 123
jshell> new BigDecimal("١٢٣")
$195 ==> 123
jshell> new BigDecimal("１２３")
$194 ==> 123
jshell> new BigDecimal("١٢٣")
$195 ==> 123
March 19, 2025 at 5:05 PM
Reminded that `BigDecimal` accepts non-ASCII numbers, while `Double` does not:
jshell> new BigDecimal("１２３")
$194 ==> 123
jshell> new BigDecimal("١٢٣")
$195 ==> 123
jshell> new BigDecimal("１２３")
$194 ==> 123
jshell> new BigDecimal("١٢٣")
$195 ==> 123
BigDecimal. Pronto, sem mistério
December 29, 2024 at 10:54 PM
BigDecimal. Pronto, sem mistério
