Large Integer Computing - Introduction to Cryptography with Java Applets - page 56

FIGURE 2.7

This method returns a BigInteger whose value is this << n ; that is, it shifts the binary rep-
resentation of this n bits to the left.

• public BigInteger shiftRight(int n)
This method returns a BigInteger whose value is this >> n ; that is, it shifts the binary rep-

resentation of this n bits to the right.

• public BigInteger and(BigInteger val)
This method returns a BigInteger whose value is (

this

& val). It performs a bitwise AND

on the two BigIntegers.

E XAMPLE .

If a and b are two BigIntegers, where

a = 1001011 base 2
b = 1011010 base 2

then the following call

BigInteger c = a.and(b);

c

leaves with the value 1001010 base 2 .

This method returns a negative number iff both

this

and val are negative.

• public BigInteger or(BigInteger val)
This method returns a BigInteger whose value is ( this | val).

E XAMPLE .

This method performs a bitwise OR on the two operands. So if a and b are as

defined previously; that is,

a = 1001011 base 2

b = 1011010 base 2