Java 中的 BigInteger 除()方法，示例
原文:https://www . geesforgeks . org/big integer-divide-in-Java-method-with-examples/
T1 大整数。divide(BigInteger val) 用于计算两个 BigInteger 的除法。BigInteger 类内部使用整数数组进行处理，对 big integer 对象的操作没有对原语的操作快。此方法对调用此方法的当前大整数执行操作，并将大整数作为参数传递。
语法:
public BigInteger divide(BigInteger val)
参数:这个方法接受一个参数值，这个值就是这个大整数的除数。
返回值:这个方法返回一个大整数，它保存整数(非浮点值)中的除法(this / val)，也就是说，它将结果舍入到它的最低值。
异常:参数 val 不能为 0，否则抛出 算术异常 。
下面的程序用来说明 BigInteger 的 divide()方法。
例 1:
// Java program to demonstrate
// divide() method of BigInteger
import java.math.BigInteger;
public class GFG {
public static void main(String[] args)
{
// BigInteger object to store result
BigInteger div;
// Two objects of String created
// Holds the values to calculate the division
String input1 = "400000000000000000"
+ "000000000000000000";
String input2 = "8000000";
// Convert the string input to BigInteger
BigInteger a
= new BigInteger(input1);
BigInteger b
= new BigInteger(input2);
// Using divide() method
div = a.divide(b);
// Display the result in BigInteger
System.out.println("The division of\n"
+ a + " \nby\n" + b + " "
+ "\nis\n" + div);
}
}
输出:
The division of
400000000000000000000000000000000000
by
8000000
is
50000000000000000000000000000
示例 2: 演示如何舍入结果
// Java program to demonstrate
// divide() method of BigInteger
import java.math.BigInteger;
public class GFG {
public static void main(String[] args)
{
// BigInteger object to store result
BigInteger div;
// Two objects of String created
// Holds the values to calculate the division
String input1 = "456216545";
String input2 = "21255132";
// Convert the string input to BigInteger
BigInteger a
= new BigInteger(input1);
BigInteger b
= new BigInteger(input2);
// Using divide() method
div = a.divide(b);
// Display the result in BigInteger
System.out.println("The division of\n"
+ a + " \nby\n" + b + " "
+ "\nis " + div);
double d = Double.parseDouble(input1)
/ Double.parseDouble(input2);
// Display result in double type
// To match both the results
System.out.print("Using double result is " + d);
}
}
输出:
The division of
456216545
by
21255132
is 21
Using double result is 21.46383024109189
示例 3: 演示被 0 除时抛出的异常
// Java program to demonstrate
// divide() method of BigInteger
import java.math.BigInteger;
public class GFG {
public static void main(String[] args)
{
// BigInteger object to store result
BigInteger div;
// Two objects of String created
// Holds the values to calculate the division
String input1 = "456216545"
+ "452133155";
String input2 = "0";
// Convert the string input to BigInteger
BigInteger a
= new BigInteger(input1);
BigInteger b
= new BigInteger(input2);
// Using divide() method
try {
div = a.divide(b);
// Display the result in BigInteger
System.out.println("The division of\n"
+ a + " \nby\n" + b + " "
+ "\nis\n" + div + "\n");
}
catch (ArithmeticException e) {
System.out.println(e);
}
}
}
输出:
java.lang.ArithmeticException: BigInteger divide by zero
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