Petrosharp bigdecimal unit converter

Converting strings to BigDecimal safely is a crucial aspect of programming in Java, especially when dealing with financial calculations where precision matters. The class BigDecimal can help avoid issues related to floating-point arithmetic, offering accurate decimal representation.In this article, we will discuss the method of converting strings to BigDecimal, particularly utilizing the DecimalFormat class to streamline this operation. We will explore what BigDecimal is, its importance, and how to safely perform conversions from the string format.Understanding BigDecimalBigDecimal is an immutable class in Java that represents arbitrary-precision decimal numbers. Due to its design, using BigDecimal avoids common pitfalls encountered with double and float. For example, while calculating monetary amounts or scientific data, precision does matter, and losing even a fractional part could result in errors during analysis or financial computations. Precision: It retains significant digits and allows for exact value representation. Control: Developers have explicit control over rounding modes, ensuring expected results. Versatility: Can represent financial values without risking inaccuracies associated with floating-point types.Safe Conversion MechanismWhen converting strings to BigDecimal, it’s essential to handle potential exceptions and ensure the format of the input string is correct. A convenient way to parse strings as BigDecimal can be through the DecimalFormat class’s capabilities in Java.Using the setter method setParseBigDecimal(true) in the DecimalFormat class guarantees the output is a BigDecimal. By doing so, you can confidently parse the string knowing if it fulfills all conditions, it’s interpreted correctly. Here’s how it works:import java.text.DecimalFormat;import java.text.ParseException;import java.math.BigDecimal;public class BigDecimalConverter { public static void main(String[] args) { String numericString = "12345.6789"; try { DecimalFormat df = new DecimalFormat(); df.setParseBigDecimal(true); BigDecimal bigDecimalValue = (BigDecimal) df.parse(numericString); System.out.println("Converted BigDecimal: " + bigDecimalValue); } catch (ParseException e) { System.err.println("Error parsing the string: " + e.getMessage()); } }}Explanation of the Code ExampleThe above code demonstrates how to convert a numeric string to BigDecimal using DecimalFormat. Here’s a breakdown of the important parts: DecimalFormat df = new DecimalFormat();: This line creates a new instance of DecimalFormat. df.setParseBigDecimal(true);: This tells the parser to return a BigDecimal instead of a Number subclass. df.parse(numericString);: The method attempts to parse the given string into a BigDecimal? If

Package converter import java.math.BigDecimal import kotlin.math.pow tailrec fun convertFromDecimal(rest: Long, base: Int, result: ListString>): ListString> { return if (rest base) { result + rest.toString(base) } else { val remainder = rest % base val quotient = rest / base convertFromDecimal(quotient, base, result + remainder.toString(base)) } } fun convertFromDecimal(number: Long, base: Int): String { return convertFromDecimal(number, base, emptyList()) .reversed() .joinToString("") { it } } fun convertFractionalFromDecimal(fractional: BigDecimal, base: Int): String { val result = mutableListOfString>() var remaining = fractional var precision = 1 while (precision 5 && remaining.compareTo(BigDecimal.ZERO) != 0) { remaining = remaining.multiply(base.toBigDecimal()) val integerPart = remaining.toInt() if (integerPart > 0) { result.add(integerPart.toString(base)) remaining = remaining.subtract(integerPart.toBigDecimal()) } else { result.add("0") } precision++ } return result.joinToString("") { it.toString() } } fun convertToDecimal(number: String, base: Int): Long { return number.toLowerCase().reversed().mapIndexed { i, c -> (Integer.valueOf(c.toString(), base) * base.toDouble().pow(i)).toLong() }.sum() } fun convertFractionalToDecimal(factional: String, base: Int): BigDecimal { return factional.toLowerCase().mapIndexed { i, c -> val number = Integer.valueOf(c.toString(), base) if (number == 0) { number.toBigDecimal() } else { (number * base.toDouble().pow(-(i+1))).toBigDecimal() } }.reduceRight(BigDecimal::add) } fun convert(number: String, source: Int, target: Int): String { return try { if (number.contains('.')) { val (integer, fractional) = number.split(".") val decimalInteger = convertToDecimal(integer, source) val convertedInteger = convertFromDecimal(decimalInteger, target) val decimalFractional = convertFractionalToDecimal(fractional, source) val convertedFractional = convertFractionalFromDecimal(decimalFractional, target) "$convertedInteger.$convertedFractional" } else { val decimal = convertToDecimal(number, source) convertFromDecimal(decimal, target) } } catch (e: Throwable) { "error when trying to convert $number from base $source to base $target" } } fun convert(source: Int, target: Int) { while (true) { print("Enter number in base ${source} to convert to base $target (To go back type /back) ") val input = readLine()!! if (input == "/back") { break } if (source == target) { if (input.contains(".")) { val (integer, fractional) = input.split(".") println("Conversion result: $integer.${fractional.substring(0, 5)}") } else { println("Conversion result: $input") } } else { val result = convert(input, source, target) println("Conversion result: $result") } println() } } fun main() { while (true) { print("Enter two numbers in format: {source base} {target base} (To quit type /exit) ") val command = readLine()!! if (command == "/exit") { break } val (source, target) = command.split(" ").map { it.toInt() } convert(source, target) } }

The issue is similar to #279.I encountered this error in the following development: installing bigdecimal 3.1.9 on JRuby, the following error occurs: at extconf.rb:18To see why this extension failed to compile, please check the mkmf.log which can be found here: /Users/koic/.rbenv/versions/jruby-9.4.7.0/lib/ruby/gems/shared/extensions/universal-java-1.8/3.1.0/bigdecimal-3.1.9/mkmf.logextconf failed, exit code 1Gem files will remain installed in /Users/koic/.rbenv/versions/jruby-9.4.7.0/lib/ruby/gems/shared/gems/bigdecimal-3.1.9 for inspection.Results logged to /Users/koic/.rbenv/versions/jruby-9.4.7.0/lib/ruby/gems/shared/extensions/universal-java-1.8/3.1.0/bigdecimal-3.1.9/gem_make.out">$ ruby -vjruby 9.4.7.0 (3.1.4) 2024-04-29 597ff08ac1 Java HotSpot(TM) 64-Bit Server VM 25.271-b09 on 1.8.0_271-b09 +jit [x86_64-darwin]$ gem i bigdecimal:3.1.9Fetching bigdecimal-3.1.9.gemBuilding native extensions. This could take a while...ERROR: Error installing bigdecimal: ERROR: Failed to build gem native extension. current directory: /Users/koic/.rbenv/versions/jruby-9.4.7.0/lib/ruby/gems/shared/gems/bigdecimal-3.1.9/ext/bigdecimal/Users/koic/.rbenv/versions/jruby-9.4.7.0/bin/jruby -I /Users/koic/.rbenv/versions/jruby-9.4.7.0/lib/ruby/stdlib extconf.rbchecking for __builtin_clz()... *** extconf.rb failed ***Could not create Makefile due to some reason, probably lack of necessarylibraries and/or headers. Check the mkmf.log file for more details. You mayneed configuration options.Provided configuration options: --with-opt-dir --without-opt-dir --with-opt-include --without-opt-include=${opt-dir}/include --with-opt-lib --without-opt-lib=${opt-dir}/lib --with-make-prog --without-make-prog --srcdir=. --curdir --ruby=/Users/koic/.rbenv/versions/jruby-9.4.7.0/bin/jrubyRuntimeError: The compiler failed to generate an executable file.You have to install development tools first. try_do at /Users/koic/.rbenv/versions/jruby-9.4.7.0/lib/ruby/stdlib/mkmf.rb:456 try_compile at /Users/koic/.rbenv/versions/jruby-9.4.7.0/lib/ruby/stdlib/mkmf.rb:571 with_werror at /Users/koic/.rbenv/versions/jruby-9.4.7.0/lib/ruby/stdlib/mkmf.rb:524 try_compile at /Users/koic/.rbenv/versions/jruby-9.4.7.0/lib/ruby/stdlib/mkmf.rb:571 have_builtin_func at extconf.rb:6 checking_for at /Users/koic/.rbenv/versions/jruby-9.4.7.0/lib/ruby/stdlib/mkmf.rb:942 postpone at /Users/koic/.rbenv/versions/jruby-9.4.7.0/lib/ruby/stdlib/mkmf.rb:350 open at /Users/koic/.rbenv/versions/jruby-9.4.7.0/lib/ruby/stdlib/mkmf.rb:320 postpone at /Users/koic/.rbenv/versions/jruby-9.4.7.0/lib/ruby/stdlib/mkmf.rb:350 open at /Users/koic/.rbenv/versions/jruby-9.4.7.0/lib/ruby/stdlib/mkmf.rb:320 postpone at /Users/koic/.rbenv/versions/jruby-9.4.7.0/lib/ruby/stdlib/mkmf.rb:346 checking_for at /Users/koic/.rbenv/versions/jruby-9.4.7.0/lib/ruby/stdlib/mkmf.rb:941 have_builtin_func at extconf.rb:5 at extconf.rb:18To see why this extension failed to compile, please check the mkmf.log which can be found here: /Users/koic/.rbenv/versions/jruby-9.4.7.0/lib/ruby/gems/shared/extensions/universal-java-1.8/3.1.0/bigdecimal-3.1.9/mkmf.logextconf failed, exit code 1Gem files will remain installed in /Users/koic/.rbenv/versions/jruby-9.4.7.0/lib/ruby/gems/shared/gems/bigdecimal-3.1.9 for inspection.Results logged to /Users/koic/.rbenv/versions/jruby-9.4.7.0/lib/ruby/gems/shared/extensions/universal-java-1.8/3.1.0/bigdecimal-3.1.9/gem_make.outNo error occurs with bigdecimal 3.1.8.$ ruby -vjruby 9.4.7.0 (3.1.4) 2024-04-29 597ff08ac1 Java HotSpot(TM) 64-Bit Server VM 25.271-b09 on 1.8.0_271-b09 +jit [x86_64-darwin]$

Successful, it returns the parsed value. Encapsulated within a try-catch block to manage any possible ParseException resulting from invalid string formats.Best Practices for String to BigDecimal Conversion Always validate input: Before attempting conversion, ensure the string is a valid number format to prevent parsing errors. Use try-catch blocks: Always encapsulate your parsing logic within try-catch blocks to gracefully handle any exceptions thrown. Consider locale sensitivity: Depending on the user’s locale, consider using localized formatting. Mind currency symbols: If dealing with currencies, strip symbols before parsing.Common Challenges and SolutionsThere are several challenges that developers may face while converting strings to BigDecimal, including: Invalid Formats: Input strings being not strictly formatted as expected can lead to ParseException. One way to mitigate this is by using regular expressions to check the formatting before parsing. Leading or Trailing Spaces: Users may inadvertently provide spaces around numerical inputs. Use trim() to clean up input strings before parsing. Empty Strings: Attempting to convert an empty string will throw a NumberFormatException. Check for non-empty strings before parsing.Advanced Concepts Related to BigDecimalBeyond basic safety measures in converting strings to BigDecimal, there are advanced concepts worth considering: Rounding Modes: Understanding different rounding modes available in BigDecimal (like ROUND_HALF_UP, ROUND_DOWN) can significantly affect calculation outcomes. Arithmetic Operations: Gaining proficiency in using methods like add, subtract, multiply, and divide can facilitate more complex operations within your applications. Performance Considerations: When working with very high volumes of data, evaluating performance implications of frequent BigDecimal instantiations is vital.Personal Insight and ConclusionIn summary, converting strings to BigDecimal in a safe manner is pivotal in many applications, especially in financial systems where accuracy is paramount. Understanding how to utilize DecimalFormat, alongside tracking best practices and addressing common pitfalls, establishes a strong foundation for successful implementations. While the basics of using BigDecimal may seem straightforward, there are underlying complexities that merit detailed exploration.Moving forward, I suggest familiarizing yourself further with BigDecimal through practical coding sessions, exploring real-world usage scenarios, and acknowledging the nuances involved in decimal-based calculations. Ultimately, exercise caution with string formats, continuously refine your validation steps, and maintain precision throughout computations.