Java Math BigInteger.isProbablePrime() 方法

package com.codingdict;



import java.math.*;



public class BigIntegerDemo {



   public static void main(String[] args) {



      // create 3 BigInteger objects

      BigInteger bi1, bi2, bi3;



      // create 3 Boolean objects

      Boolean b1, b2, b3;



      // assign values to bi1, bi2

      bi1 = new BigInteger("7");

      bi2 = new BigInteger("9");



      // perform isProbablePrime on bi1, bi2

      b1 = bi1.isProbablePrime(1);

      b2 = bi2.isProbablePrime(1);

      b3 = bi2.isProbablePrime(-1);



      String str1 = bi1+ " is prime with certainity 1 is " +b1;

      String str2 = bi2+ " is prime with certainity 1 is " +b2;

      String str3 = bi2+ " is prime with certainity -1 is " +b3;



      // print b1, b2, b3 values

      System.out.println( str1 );

      System.out.println( str2 );

      System.out.println( str3 );

   }

}