See this to learn about the valid variable names in java · Variable names can include any alphabetic character or digit and the underscore _. The main restriction on the names you can give your variables is that they cannot contain any white space. You cannot begin a variable name with a number. ... If the Value is whether flot or double to identigy the JVM using the number end with -d and -f. For example... More on stackoverflow.com

Does it do two checks if you do a zero comparison with a double? ... For pretty much everything that you try and fail, you can safely assume someone else tried and failed before, and wrote about it at the Internet. First hit was https://stackoverflow.com/questions/39933792/how-do-i-check-for-a-negative-zero-in-java... More on gamedev.net

On July 1st, a change to Reddit's API pricing will come into effect. Several developers of commercial third-party apps have announced that this change will compel them to shut down their apps. At least one accessibility-focused non-commercial third party app will continue to be available free of charge. If you want to express your strong disagreement with the API pricing change or with Reddit's response to the backlash, you may want to consider the following options: Limiting your involvement with Reddit, or Temporarily refraining from using Reddit Cancelling your subscription of Reddit Premium as a way to voice your protest. I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns. More on reddit.com

I put together an example for you that prints the raw storage bits. I think it covers most cases and should print the stored value as close as possible. For 0.3 it prints 0.29999999999999998889776975374843450 value = 0.3 encoded1 = (5404319552844595 / 4503599627370496) * 2^-2 encoded2 = 1.199999999999999955591079014993738 * 2^-2 result = 0.29999999999999998889776975374843450 import java.math.BigDecimal; import java.math.MathContext; public class DoublePrinter { public static void main(String[] args) { // see https://en.wikipedia.org/wiki/Double-precision_floating-point_format // a double is stored as sign * significand * 2^(exp-1023) double value = 0.3; long bits = Double.doubleToLongBits(value); // the sign is stored in the upmost bit, same as long long sign = Long.signum(bits); // first bit long exponentBits = (bits & EXP_BIT_MASK) >>> 52; // next 11 bits long significandBits = bits & SIGNIF_BIT_MASK; // lowest 52 // add the implicit leading bit if not subnormal if (exponentBits != 0) { significandBits |= 0x10000000000000L; } // map to a more readable represenation (significand is stored as (value / 1L<<52)) long divisor = 1L << 52; int exponent = (int) (exponentBits - 1023); // compute result using BigDecimal var mc = MathContext.DECIMAL128; BigDecimal significand = new BigDecimal(significandBits).divide(new BigDecimal(divisor), mc); BigDecimal scale = new BigDecimal(2).pow(exponent, mc); BigDecimal result = new BigDecimal(sign).multiply(significand).multiply(scale); System.out.println("value = " + value); System.out.println(String.format("encoded1 = %s(%d / %d) * 2^%d", sign < 0 ? "-" : "", significandBits, divisor, exponent)); System.out.println(String.format("encoded2 = %s%s * 2^%d", sign < 0 ? "-" : "", significand.toString(), exponent)); System.out.println("result = " + result); } final static long SIGN_BIT_MASK = 0x8000000000000000L; final static long EXP_BIT_MASK = 0x7FF0000000000000L; final static long SIGNIF_BIT_MASK = 0x000FFFFFFFFFFFFFL; } More on reddit.com