Example Program

Here is a program that uses these methods:

import java.math.BigInteger;
import java.util.Scanner;

class RemainderDemo
{

  public static void main ( String[] args )
  {
    Scanner scan = new Scanner( System.in );
    String input;
    BigInteger a, divisor, q, r;
    
    System.out.print("a: ");
    input = scan.next();
    a = new BigInteger( input.trim() );
    
    System.out.print("divisor: ");
    input = scan.next();
    divisor = new BigInteger( input.trim() );
  
    q = a.divide( divisor );
    r = a.remainder( divisor );
    
    System.out.println( a + " divide    " + divisor + " == " + q);
    System.out.println( a + " remainder " + divisor + " == " + r);
    System.out.println( q + " multiply  " + divisor +  " add " + r + " == " 
        + (q.multiply(divisor)).add(r) );
  }
}



C:\>java RemainderDemo
a: 17
divisor: 3
17 divide    3 == 5
17 remainder 3 == 2
5 multiply  3 add 2 == 17

C:\>java RemainderDemo
a: -17
divisor: 3
-17 divide    3 == -5
-17 remainder 3 == -2
-5 multiply  3 add -2 == -17

QUESTION 15:

What do you suppose the following prints?

BigInteger A = new BigInteger( "18" );
BigInteger B = new BigInteger( "18" );

if ( A == B )
  System.out.println("Trick Question");
else
  System.out.println("Didn't fool me");

if ( A.equals( B ) )
  System.out.println("Totally Expected");
else
  System.out.println("Reference vs Object Confusion");