Guava BigIntegerMath类的除法(BigInteger p,BigInteger q,RoundingMode模式)会返回p除以q的结果,并使用指定的RoundingMode进行舍入。
用法:
public static BigInteger divide(BigInteger p, BigInteger q, RoundingMode mode)
参数:此方法采用以下参数:
- p:BigInteger股息
- q:BigInteger除数
- mode:用于计算p和q的除法的舍入模式。
返回值:此方法返回p除以q的结果,使用指定的RoundingMode进行舍入。
异常:如果q == 0或mode == UNNECESSARY并且a不是b的整数倍,则该方法引发ArithmeticException。
Enum RoundingMode
枚举常量 | 描述 |
---|---|
CEILING | 舍入模式向正无穷大舍入。 |
DOWN | 舍入模式向零舍入。 |
FLOOR | 舍入模式向负无穷大舍入。 |
HALF_DOWN | 除非两个邻居等距,否则舍入模式将朝“nearest neighbor”舍入。 |
HALF_EVEN | 舍入模式向“nearest neighbor”舍入,除非两个邻居都等距,在这种情况下,向偶数邻居舍入。 |
HALF_UP | 除非两个邻居等距,否则舍入模式将朝“nearest neighbor”舍入。 |
UNNECESSARY | 舍入模式可以断言所请求的操作具有准确的结果,因此不需要舍入。 |
UP | 舍入模式从零舍入。 |
以下示例说明了BigIntegerMath.divide()方法:
范例1:
// Java code to show implementation of
// divide(BigInteger p, BigInteger q, RoundingMode mode)
// method of Guava's BigIntegerMath class
import java.math.*;
import com.google.common.math.BigIntegerMath;
class GFG {
// Driver code
public static void main(String args[])
{
BigInteger dividend1 = BigInteger.valueOf(55);
BigInteger divisor1 = BigInteger.valueOf(10);
// Using divide()
// method of Guava's BigIntegerMath class
BigInteger
quotient1
= BigIntegerMath
.divide(dividend1,
divisor1,
RoundingMode.HALF_DOWN);
System.out.println(dividend1 + " divided by "
+ divisor1
+ " with HALF_DOWN rounding mode:"
+ quotient1);
BigInteger dividend2 = BigInteger.valueOf(55);
BigInteger divisor2 = BigInteger.valueOf(10);
// Using divide()
// method of Guava's BigIntegerMath class
BigInteger
quotient2
= BigIntegerMath
.divide(dividend2,
divisor2,
RoundingMode.CEILING);
System.out.println(dividend2 + " divided by "
+ divisor2
+ " with CEILING rounding mode:"
+ quotient2);
}
}
输出:
55 divided by 10 with HALF_DOWN rounding mode:5 55 divided by 10 with CEILING rounding mode:6
范例2:
// Java code to show implementation of
// divide(BigInteger p, BigInteger q, RoundingMode mode)
// method of Guava's BigIntegerMath class
import java.math.*;
import com.google.common.math.BigIntegerMath;
class GFG {
// Driver code
public static void main(String args[])
{
try {
BigInteger dividend1 = BigInteger.valueOf(25);
BigInteger divisor1 = BigInteger.valueOf(0);
// Using divide()
// method of Guava's BigIntegerMath class
// This should raise "ArithmeticException"
// as divisor1 = 0
BigInteger
quotient1
= BigIntegerMath
.divide(dividend1,
divisor1,
RoundingMode.HALF_DOWN);
}
catch (Exception e) {
System.out.println("Exception:" + e);
}
}
}
输出:
Exception:java.lang.ArithmeticException:/ by zero
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注:本文由纯净天空筛选整理自Sahil_Bansall大神的英文原创作品 BigIntegerMath divide() function | Guava | Java。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。