Java Archives - IODocs https://www.iodocs.com/java/ IODocs: Comprehensive How-To Guides, Software Tutorials, and More IODocs.com Tue, 22 Jan 2019 22:21:07 +0000 en-US hourly 1 https://wordpress.org/?v=6.9 https://www.iodocs.com/wp-content/uploads/2019/01/cropped-logoIODOCSretina-32x32.avif Java Archives - IODocs https://www.iodocs.com/java/ 32 32 How to round a number to n decimal places in Java https://www.iodocs.com/round-number-n-decimal-places-java/ Sun, 21 Jan 2018 06:11:01 +0000 http://iodocs.com/?p=193 Use setRoundingMode, set the RoundingMode explicitly to handle your issue with the half-even round, then use the format pattern for your required output. DecimalFormat df = new DecimalFormat("#.####"); df.setRoundingMode(RoundingMode.CEILING); for (Number n : Arrays.asList(12, 123.12345, 0.23, 0.1, 2341234.212431324)) { Double d = n.doubleValue(); System.out.println(df.format(d)); } gives the output: 12 123.1235 0.23 0.1 2341234.2125 What I’d […]

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