Java Math BigInteger.testBit() 方法

package com.codingdict;



import java.math.*;



public class BigIntegerDemo {



   public static void main(String[] args) {



      // create a BigInteger object

      BigInteger bi;



      // create 2 boolean objects

      Boolean b1, b2;



      bi = new BigInteger("10"); 



      // perform testbit on bi at index 2 and 3

      b1 = bi.testBit(2);

      b2 = bi.testBit(3);



      String str1 = "Test Bit on " + bi + " at index 2 returns " +b1;

      String str2 = "Test Bit on " + bi + " at index 3 returns " +b2;



      // print b1, b2 values

      System.out.println( str1 );

      System.out.println( str2 );

   }

}