How to make floating point division

I have tried many alternatives but i couldnt make any single floating point number printed to a page...
I am compiling the servlet with eclipse 3.2 without any error but the jsp page says java.lang.NoSuchFieldError: floatnumber even i have that variable...
i have tried double,float but both of them makes the error above...but i can print long as well.
can anyone teach me to divide 2 integer values and print the exact result like;
3 / 5 = 0.6

can anyone teach me to divide 2 integer values and
print the exact result like;
3 / 5 = 0.6
int a= 3, b= 5;
double result= ((double)a)/b;... or any valid variation thereof.
kind regards,
Jos

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How can floating point division be faster than integer division?

Hello,
I don't know if this is a Java quirk, or if I am doing something wrong. Check out this code:
public class TestApp
     public static void main(String args[])
          long lngOldTime;
          long lngNewTime;
          long lngTimeDiff;
          int Tmp;
          lngOldTime = System.currentTimeMillis();
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                    Tmp = A / B;
          lngNewTime = System.currentTimeMillis();
          lngTimeDiff = lngNewTime - lngOldTime;
          System.out.println(lngTimeDiff);
}It reports that the division operations took 18,116 milliseconds.
Now check out this code (integers replaced with doubles):
public class TestApp
     public static void main(String args[])
          long lngOldTime;
          long lngNewTime;
          long lngTimeDiff;
          double Tmp;
          lngOldTime = System.currentTimeMillis();
          for( double A=1 ; A<=20000 ; A++)
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          lngNewTime = System.currentTimeMillis();
          lngTimeDiff = lngNewTime - lngOldTime;
          System.out.println(lngTimeDiff);
}It runs in 11,276 milliseconds.
How is it that the second code snippet could be so much faster than the first? I am using jdk1.4.2_04
Thanks in advance!

I'm afraid you missed several key points. I only used
Longs for measuring the time (System.currentTimeMillis
returns a long). Sorry you are correct I did miss that.
However, even if I had, double is
also a 64-bit data type - so technically that would
have been a more fair test. The fact that 64-bit
floating point divisions are faster than 32-bit
integer divisions is what confuses me.
Oh, just in case you're interested, using float's in
that same snippet takes only 7,471 milliseconds to
execute!Then the other explaination is that the Hotspot compiler is optimizing the floating point code to use the cpu floating point instructions but it is not optimizing the integer divide in the same way.

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I am very new to NI and I am looking for an example of floating-point addition unit. Basically, I am looking for some example to perform addition of two floating point number (single or double precision). -- just how to create floating-point addition unit using logical gates model (i.e. AND, OR, XOR, etc)
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Message Edited by smuStudent on 12-05-2005 11:51 PM

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Attachments:
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http://hardware.slashdot.org/article.pl?sid=07/02/10/0554208
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/* "quad" is a hypothetical 128-bit quad precision */
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/* in recent versions of C++:                       */
quad x, y, z;
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http://www.cs.berkeley.edu/~wkahan/
PDF DOCUMENT: How JAVA's Floating-Point Hurts Everyone Everywhere
http://www.cs.berkeley.edu/~wkahan/JAVAhurt.pdf
PDF DOCUMENT: Matlab's Loss is Nobody's Gain
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HI All..
Most of us are not awared how the actually Floating point numbers are represented . IEEE have set standards as how should we represent floating point numbers.
I am giving u the link with which u can know how actually these are represented.
http://en.wikipedia.org/wiki/IEEE_754
If u have any doubts u can always reach me.
Bye
Happy learning
[email protected]

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{code}
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