I'm not a commons committer, but I think it moved to Java 8, where you already have the same functionality available in the JDK. NumberFormat and DecimalFormat [1] will do the same already, if I am not mistaken.
Ben 1: https://www.baeldung.com/java-number-formatting On Thu, 13 May 2021, 17:59 Matt Juntunen, <matt.juntu...@hotmail.com> wrote: > Hello, > > For the geometry IO work I did recently, I ended up creating a > DoubleFormats [1] utility class that generates formatters for various > floating point string representations. It creates formatters for plain > (straight decimal), scientific, engineering, and mixed plain and scientific > formats. A maximum number of significant decimal digits and a minimum > exponent value can be specified for each format. Here is a simple example: > > > int maxPrecision = 4; > > DoubleFormat plain = DoubleFormats.createPlain(maxPrecision); > plain.format(Math.PI); // 3.142 > plain.format(-123456789); // -123500000.0 > plain.format(1.23456789e-6); // 0.000001235 > > DoubleFormat eng = DoubleFormats.createEngineering(maxPrecision); > eng.format(Math.PI); // 3.142 > eng.format(-123456789); // -123.5E6 > eng.format(1.23456789e-6); // 1.235E-6 > > > I currently have the methods returning a DoubleFormat functional interface > but I plan on changing this to simply DoubleFunction<String>. > > Is there any interest in moving this functionality to commons-text? I find > it quite useful since it is thread-safe and much faster than using > String.format or similar. I've actually created a class with much the same > functionality for use in my day job. It would be nice if I could use > something from commons for that. > > Regards, > Matt J > > [1] > https://github.com/apache/commons-geometry/blob/master/commons-geometry-io-core/src/main/java/org/apache/commons/geometry/io/core/utils/DoubleFormats.java > >
