Package org.threeten.bp.jdk8

Class Jdk8Methods

java.lang.Object
org.threeten.bp.jdk8.Jdk8Methods
public final class Jdk8Methods extends Object
A set of utility methods that provide additional functionality for working with dates and times.

The contents of this class replace functionality available in JDK 8.

Specification for implementors

This is a thread-safe utility class. All returned classes are immutable and thread-safe.

  • Method Summary

    Modifier and Type
    Method
    Description
    static int
    floorDiv(int a, int b)
    Returns the floor division.
    static long
    floorDiv(long a, long b)
    Returns the floor division.
    static int
    floorMod(int a, int b)
    Returns the floor modulus.
    static int
    floorMod(long a, int b)
    Returns the floor modulus.
    static long
    floorMod(long a, long b)
    Returns the floor modulus.
    static int
    safeAdd(int a, int b)
    Safely adds two int values.
    static long
    safeAdd(long a, long b)
    Safely adds two long values.
    static int
    safeMultiply(int a, int b)
    Safely multiply one int by another.
    static long
    safeMultiply(long a, int b)
    Safely multiply a long by an int.
    static long
    safeMultiply(long a, long b)
    Multiply two values throwing an exception if overflow occurs.
    static int
    safeSubtract(int a, int b)
    Safely subtracts one int from another.
    static long
    safeSubtract(long a, long b)
    Safely subtracts one long from another.
    static int
    safeToInt(long value)
    Safely convert a long to an int.

    Methods inherited from class java.lang.Object

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

  • Method Details

    • safeAdd

      public static int safeAdd(int a, int b)
      Safely adds two int values.
      Parameters:
      a - the first value
      b - the second value
      Returns:
      the result
      Throws:
      ArithmeticException - if the result overflows an int

    • safeAdd

      public static long safeAdd(long a, long b)
      Safely adds two long values.
      Parameters:
      a - the first value
      b - the second value
      Returns:
      the result
      Throws:
      ArithmeticException - if the result overflows a long

    • safeSubtract

      public static int safeSubtract(int a, int b)
      Safely subtracts one int from another.
      Parameters:
      a - the first value
      b - the second value to subtract from the first
      Returns:
      the result
      Throws:
      ArithmeticException - if the result overflows an int

    • safeSubtract

      public static long safeSubtract(long a, long b)
      Safely subtracts one long from another.
      Parameters:
      a - the first value
      b - the second value to subtract from the first
      Returns:
      the result
      Throws:
      ArithmeticException - if the result overflows a long

    • safeMultiply

      public static int safeMultiply(int a, int b)
      Safely multiply one int by another.
      Parameters:
      a - the first value
      b - the second value
      Returns:
      the result
      Throws:
      ArithmeticException - if the result overflows an int

    • safeMultiply

      public static long safeMultiply(long a, int b)
      Safely multiply a long by an int.
      Parameters:
      a - the first value
      b - the second value
      Returns:
      the new total
      Throws:
      ArithmeticException - if the result overflows a long

    • safeMultiply

      public static long safeMultiply(long a, long b)
      Multiply two values throwing an exception if overflow occurs.
      Parameters:
      a - the first value
      b - the second value
      Returns:
      the new total
      Throws:
      ArithmeticException - if the result overflows a long

    • safeToInt

      public static int safeToInt(long value)
      Safely convert a long to an int.
      Parameters:
      value - the value to convert
      Returns:
      the int value
      Throws:
      ArithmeticException - if the result overflows an int

    • floorDiv

      public static long floorDiv(long a, long b)
      Returns the floor division.

      This returns 0 for floorDiv(0, 4).
      This returns -1 for floorDiv(-1, 4).
      This returns -1 for floorDiv(-2, 4).
      This returns -1 for floorDiv(-3, 4).
      This returns -1 for floorDiv(-4, 4).
      This returns -2 for floorDiv(-5, 4).

      Parameters:
      a - the dividend
      b - the divisor
      Returns:
      the floor division

    • floorMod

      public static long floorMod(long a, long b)
      Returns the floor modulus.

      This returns 0 for floorMod(0, 4).
      This returns 1 for floorMod(-1, 4).
      This returns 2 for floorMod(-2, 4).
      This returns 3 for floorMod(-3, 4).
      This returns 0 for floorMod(-4, 4).

      Parameters:
      a - the dividend
      b - the divisor
      Returns:
      the floor modulus (positive)

    • floorMod

      public static int floorMod(long a, int b)
      Returns the floor modulus.

      This returns 0 for floorMod(0, 4).
      This returns 3 for floorMod(-1, 4).
      This returns 2 for floorMod(-2, 4).
      This returns 1 for floorMod(-3, 4).
      This returns 0 for floorMod(-4, 4).
      This returns 3 for floorMod(-5, 4).

      Parameters:
      a - the dividend
      b - the divisor
      Returns:
      the floor modulus (positive)

    • floorDiv

      public static int floorDiv(int a, int b)
      Returns the floor division.

      This returns 1 for floorDiv(3, 3).
      This returns 0 for floorDiv(2, 3).
      This returns 0 for floorDiv(1, 3).
      This returns 0 for floorDiv(0, 3).
      This returns -1 for floorDiv(-1, 3).
      This returns -1 for floorDiv(-2, 3).
      This returns -1 for floorDiv(-3, 3).
      This returns -2 for floorDiv(-4, 3).

      Parameters:
      a - the dividend
      b - the divisor
      Returns:
      the floor division

    • floorMod

      public static int floorMod(int a, int b)
      Returns the floor modulus.

      This returns 0 for floorMod(3, 3).
      This returns 2 for floorMod(2, 3).
      This returns 1 for floorMod(1, 3).
      This returns 0 for floorMod(0, 3).
      This returns 2 for floorMod(-1, 3).
      This returns 1 for floorMod(-2, 3).
      This returns 0 for floorMod(-3, 3).
      This returns 2 for floorMod(-4, 3).

      Parameters:
      a - the dividend
      b - the divisor
      Returns:
      the floor modulus (positive)