first 64 bits of the fractional part of the square root of 2
<pre><code> double i=Math.sqrt(2);
 double fpart=i-(long)i;

 String s=String.valueOf(fpart);
 s=s.substring(2, s.length()-1);

 Long b=Long.parseLong(s);
 System.out.println(Long.toBinaryString(b));

 System.out.println(Long.toBinaryString(b).substring(0, 63));
</code></pre>

<p>i'm getting StringIndexOutOfBoundsException as the strig is only 52 bits long. But, I want the first 64 bits of the fractional part of the square root of 2.</p>
