LongMath is used to perform mathematical operations on Long values. Basic standalone math functions are divided into the classes
IntMath, LongMath, DoubleMath, and BigIntegerMath based on the primary numeric type involved. These classes have parallel structure, but each supports only the relevant subset of functions.
Declaration : The declaration for
com.google.common.math.LongMath class is :
@GwtCompatible(emulated = true)
public final class LongMath
extends Object
Below table shows some of the methods provided by LongMath Class of Guava :
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Exceptions :
- log2 : IllegalArgumentException if x <= 0
- log10 : IllegalArgumentException if x <= 0
- pow : IllegalArgumentException if k < 0
- sqrt : IllegalArgumentException if x < 0
- divide : ArithmeticException if q == 0, or if mode == UNNECESSARY and a is not an integer multiple of b
- mod : ArithmeticException if m <= 0
- gcd : IllegalArgumentException if a < 0 or b < 0
- checkedAdd : ArithmeticException if a + b overflows in signed long arithmetic
- checkedSubtract : ArithmeticException if a - b overflows in signed long arithmetic
- checkedMultiply : ArithmeticException if a * b overflows in signed long arithmetic
- checkedPow : ArithmeticException if b to the kth power overflows in signed long arithmetic
- factorial : IllegalArgumentException if n < 0
- binomial : IllegalArgumentException if n < 0, k < 0 or k > n
Some other methods provided by LongMath Class of Guava are :
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Example 1 :
Output :
Error Message is : mode was UNNECESSARY, but rounding was necessary
Example 2 :
