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Oct 01

How to format a number to a certain number of significant figures, as opposed to decimal places?

java Add comments

That’s a job for the BigDecimal class


public static String formatToSignificant(double value,
   int significant)
{
   MathContext mathContext = new MathContext(significant,
      RoundingMode.DOWN);
   BigDecimal bigDecimal = new BigDecimal(value,
      mathContext);
   return bigDecimal.toPlainString();
}

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