Java BigInteger mod()用法及代碼示例

java.math.BigInteger.mod(BigInteger big)方法返回一個值等於(此BigInteger mod函數big(BigInteger作為參數傳遞))的BigInteger。換句話說，我們可以說該方法執行後返回值(this ％big)步驟.mod操作將此BigInteger除以作為參數傳遞的另一個BigInteger之後找到餘數。

java.math.BigInteger.mod(BigInteger big)和java.math.BigInteger.remainder(BigInteger val)都可以找到餘數，但mod操作始終返回非負的BigInteger。

用法:

public BigInteger mod(BigInteger big)

參數：該函數接受單個必填參數big，該參數指定了我們要用來劃分此bigInteger對象的BigInteger對象。

返回值：該方法返回的BigInteger等於此BigInteger mod big(作為參數傳遞的BigInteger)。

異常：當big≤0時，該方法引發ArithmeticException

例子：

Input: BigInteger1=321456, BigInteger2=31711
Output: 4346
Explanation: BigInteger1.mod(BigInteger2)=4346. The divide operation between 
321456 and 31711 returns 4346 as remainder.

Input: BigInteger1=59185482345, BigInteger2=59185482345
Output: 0
Explanation: BigInteger1.mod(BigInteger2)=0. The divide operation between 
59185482345 and 59185482345 returns 0 as remainder.

下麵的程序說明BigInteger類的mod()方法：

示例1:

// Java program to demonstrate mod() method of BigInteger 
  
import java.math.BigInteger; 
  
public class GFG { 
  
    public static void main(String[] args) 
    { 
  
        // Creating 2 BigInteger objects 
        BigInteger b1, b2; 
  
        b1 = new BigInteger("321456"); 
        b2 = new BigInteger("31711"); 
  
        // apply mod() method 
        BigInteger result = b1.mod(b2); 
  
        // print result 
        System.out.println("Result of mod  
                 operation between " + b1 
                 + " and " + b2 + 
                 " equal to " + result); 
    } 
}

輸出：

Result of mod operation between 321456 and 31711 equal to 4346

示例2:當兩者的價值相等時。

// Java program to demonstrate mod() method of BigInteger 
  
import java.math.BigInteger; 
  
public class GFG { 
  
    public static void main(String[] args) 
    { 
  
        // Creating 2 BigInteger objects 
        BigInteger b1, b2; 
  
        b1 = new BigInteger("3515219485"); 
        b2 = new BigInteger("3515219485"); 
  
        // apply mod() method 
        BigInteger result = b1.mod(b2); 
  
        // print result 
        System.out.println("Result of mod  
                 operation between " + b1 
                 + " and " + b2 + 
                 " equal to " + result); 
    } 
}

輸出：

Result of mod operation between 3515219485 and 3515219485 equal to 0

示例3:當BigInteger作為參數傳遞時，程序顯示異常小於零。

// Java program to demonstrate mod() method of BigInteger 
  
import java.math.BigInteger; 
  
public class GFG { 
  
    public static void main(String[] args) 
    { 
  
        // Creating 2 BigInteger objects 
        BigInteger b1, b2; 
  
        b1 = new BigInteger("3515219485"); 
        b2 = new BigInteger("-1711"); 
  
        // apply mod() method 
        BigInteger result = b1.mod(b2); 
  
        // print result 
        System.out.println("Result of mod  
                 operation between " + b1 
                 + " and " + b2 + 
                 " equal to " + result); 
    } 
}

輸出：

Exception in thread "main" java.lang.ArithmeticException: BigInteger: modulus not positive
    at java.math.BigInteger.mod(BigInteger.java:2458)
    at GFG.main(GFG.java:17)

參考： https://docs.oracle.com/javase/7/docs/api/java/math/BigInteger.html#mod(java.math.BigInteger)

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注：本文由純淨天空篩選整理自AmanSingh2210大神的英文原創作品 BigInteger mod() Method in Java。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。