Package jodd.util

Class MathUtil

  • public class MathUtil
extends java.lang.Object
    Various math utilities. note: Any random values from this class are not cryptographically secure!

    • Constructor Summary

      Constructors 
      Constructor Description
      MathUtil()  

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static java.lang.String humanReadableByteCount​(long bytes, boolean useSi)
      Formats byte size to human readable bytecount.
      static boolean isEven​(int x)
      Returns true if a number is even.
      static boolean isOdd​(int x)
      Returns true if a number is odd.
      static int parseDigit​(char digit)
      Converts char digit into integer value.
      static int randomInt​(int min, int max)
      Generates pseudo-random integer from specific range.
      static long randomLong​(long min, long max)
      Generates pseudo-random long from specific range.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • MathUtil

        public MathUtil()

    • Method Detail

      • parseDigit

        public static int parseDigit​(char digit)
        Converts char digit into integer value. Accepts numeric chars (0 - 9) as well as letter (A-z).

      • randomLong

        public static long randomLong​(long min,
                              long max)
        Generates pseudo-random long from specific range. Generated number is great or equals to min parameter value and less then max parameter value.
        Parameters:
        min - lower (inclusive) boundary
        max - higher (exclusive) boundary
        Returns:
        pseudo-random value

      • randomInt

        public static int randomInt​(int min,
                            int max)
        Generates pseudo-random integer from specific range. Generated number is great or equals to min parameter value and less then max parameter value.
        Parameters:
        min - lower (inclusive) boundary
        max - higher (exclusive) boundary
        Returns:
        pseudo-random value

      • isEven

        public static boolean isEven​(int x)
        Returns true if a number is even.

      • isOdd

        public static boolean isOdd​(int x)
        Returns true if a number is odd.

      • humanReadableByteCount

        public static java.lang.String humanReadableByteCount​(long bytes,
                                                      boolean useSi)
        Formats byte size to human readable bytecount. https://stackoverflow.com/questions/3758606/how-to-convert-byte-size-into-human-readable-format-in-java/3758880#3758880