bigentermath divide()函数|番石榴| Java
原文:https://www . geesforgeks . org/bigintermath-divide-function-guava-Java/
番石榴的 BigIntegerMath 类的方法除(bigintermate p,bigintermate q,舍入模式)返回 p 除以 q 的结果,使用指定的舍入模式进行舍入。
语法:
public static BigInteger divide(BigInteger p,
BigInteger q,
RoundingMode mode)
参数:该方法取以下参数:
- p : dividend of large integer
- q : a large integer divisor.
- mode : the rounding mode for calculating the division of P and Q.
返回值:此方法返回 p 除以 q 的结果,使用指定的舍入模式进行舍入。
异常:如果 q == 0,或者如果 mode ==不必要且 a 不是 b 的整数倍,则方法抛出 算术异常
枚举舍入模式
| 枚举常数 | 描述 | | 【天花板】 | 舍入模式向正无穷大舍入。 | | DOWN | 舍入模式为向零舍入。 | | FLOOR | 舍入模式为向负无穷大舍入。 | | HALF _ DOWN | 舍入模式为向“最近邻居”舍入,除非两个邻居等距,在这种情况下舍入为 DOWN。 | | HALF _ EVEN | 舍入模式为向“最近邻居”舍入,除非两个邻居等距,在这种情况下,向偶数邻居舍入。 | | 【HALF _ UP】 | 取整模式为向“最近邻居”取整,除非两个邻居等距,在这种情况下取整。 | | 【不必要的】 | 舍入模式断言请求的操作有确切的结果,因此没有舍入的必要。 | | UP | 取整模式为远离零取整。 |
以下示例说明了 BigIntegerMath.divide()方法:
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
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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