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<TITLE>Performing Bitwise Operations on a Bit Vector (Java Developers Almanac Example)
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  <h3>e363. Performing Bitwise Operations on a Bit Vector</h3>

The <code>BitSet</code> class implements a bit-vector of an arbitrary size.
It automatically grows dynamically.  This example demonstrates how to
create and use a <code>BitSet</code>.

<P> The <code>BigInteger</code> class also support bitwise operations (see
<a href="../java.math/Bits.html" class="eglink"><b>e129</b> Performing Bitwise Operations with BigInteger</a>).  However, a <code>BigInteger</code> object is
immutable where a <code>BitSet</code> is mutable.


<pre>    // Create the bitset
    BitSet bits = new BitSet();
    
    // Set a bit on
    bits.set(<font color="#0066ff"><i>2</i></font>);                        // 100 = decimal 4
    
    // Retrieving the value of a bit
    boolean b = bits.get(<font color="#0066ff"><i>0</i></font>);            // false
    b = bits.get(<font color="#0066ff"><i>2</i></font>);                    // true
    
    // Clear a bit
    bits.clear(<font color="#0066ff"><i>1</i></font>);
    
    // Setting a range of bits
    BitSet bits2 = new BitSet();
    bits2.set(<font color="#0066ff"><i>1</i></font>, <font color="#0066ff"><i>4</i></font>);                    // 1110
    
    // And'ing two bitsets
    bits.and(bits2);                    // 0100
    
    // Xor'ing two bitsets
    bits.xor(bits2);                    // 1010
    
    // Flip all bits in the bitset
    bits.flip(0, bits.length());        // 0101
    
    // Andnot'ing two bitsets
    bits.andNot(bits2);                 // 0001
    
    // Or'ing two bitsets
    bits.or(bits2);                     // 1111
</pre>
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            &nbsp;<b>Related Examples</b></font></td>
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e364. <a class="eglink" href="Bits2Array.html?l=rel">
    Converting Between a BitSet and a Byte Array
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