AW: Java and double
That won't change anything, as the Math class uses
the normal primitive datatypes.
This is a 'problem' of representing numbers in double
and float.
-Ursprüngliche Nachricht-
Von: Mangi, Rick [mailto:[EMAIL PROTECTED]]
Gesendet: Mittwoch, 14. November 2001 17:47
An: 'Tomcat Users List'
Betreff: RE: Java and double
Ya, I've seen that one before. use the java.math package.
-Original Message-
From: Laurent Michenaud [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, November 14, 2001 10:39 AM
To: [EMAIL PROTECTED]
Subject: Java and double
Hi,
Excuse me... this mail shouldnot be on this mailing list but
it is an hurry.
public class TestDouble
{
static public void main(String args[]) {
double val = 0.5055 * 1000 ;
System.out.println( val );
}
}
This program gives me the following results :
505.44
I've tried with Sun Jdk 1.2.2rev9, Sun jdk1.3.1 and Ibm Jdk 1.3.1.
Have u got informations about this ?
Can u try too ?
Thanks a lot and sorry again
Bye
Michenaud Laurent
- Adeuza -
[ Développeur Web - Administrateur Réseau ]
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Java and double
Hi,
Excuse me... this mail shouldnot be on this mailing list but
it is an hurry.
public class TestDouble
{
static public void main(String args[]) {
double val = 0.5055 * 1000 ;
System.out.println( val );
}
}
This program gives me the following results :
505.44
I've tried with Sun Jdk 1.2.2rev9, Sun jdk1.3.1 and Ibm Jdk 1.3.1.
Have u got informations about this ?
Can u try too ?
Thanks a lot and sorry again
Bye
Michenaud Laurent
- Adeuza -
[ Développeur Web - Administrateur Réseau ]
--
To unsubscribe: mailto:[EMAIL PROTECTED]
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RE: Java and double
There is no problem. Float and Double represents a number as a mantissa and
radix which produces a close but not exact representation of a number. If
you round to a reasonable number of decimal places you will get the
correct result but if you insist on looking at the full precision of the
number you will get round off errors. This is the very nature of floating
point numbers.
-Original Message-
From: Laurent Michenaud [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, November 14, 2001 8:39 AM
To: [EMAIL PROTECTED]
Subject: Java and double
Hi,
Excuse me... this mail shouldnot be on this mailing list but
it is an hurry.
public class TestDouble
{
static public void main(String args[]) {
double val = 0.5055 * 1000 ;
System.out.println( val );
}
}
This program gives me the following results :
505.44
I've tried with Sun Jdk 1.2.2rev9, Sun jdk1.3.1 and Ibm Jdk 1.3.1.
Have u got informations about this ?
Can u try too ?
Thanks a lot and sorry again
Bye
Michenaud Laurent
- Adeuza -
[ Développeur Web - Administrateur Réseau ]
--
To unsubscribe: mailto:[EMAIL PROTECTED]
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RE: Java and double
Ya, I've seen that one before. use the java.math package.
-Original Message-
From: Laurent Michenaud [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, November 14, 2001 10:39 AM
To: [EMAIL PROTECTED]
Subject: Java and double
Hi,
Excuse me... this mail shouldnot be on this mailing list but
it is an hurry.
public class TestDouble
{
static public void main(String args[]) {
double val = 0.5055 * 1000 ;
System.out.println( val );
}
}
This program gives me the following results :
505.44
I've tried with Sun Jdk 1.2.2rev9, Sun jdk1.3.1 and Ibm Jdk 1.3.1.
Have u got informations about this ?
Can u try too ?
Thanks a lot and sorry again
Bye
Michenaud Laurent
- Adeuza -
[ Développeur Web - Administrateur Réseau ]
--
To unsubscribe: mailto:[EMAIL PROTECTED]
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only, is subject to change and does not constitute an offer
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AW: Java and double
As in most other programming languages float
and double are implemented in way that numbers
are not represented exactly. That's caused by
the internal format which is used to store
floats and doubles.
If you want know more of the basics have a look at
http://cch.loria.fr/documentation/IEEE754/ACM/goldberg.pdf
If you want more accuracy you can use
java.math.BigDecimal.
-Ursprüngliche Nachricht-
Von: Laurent Michenaud [mailto:[EMAIL PROTECTED]]
Gesendet: Mittwoch, 14. November 2001 16:39
An: [EMAIL PROTECTED]
Betreff: Java and double
Hi,
Excuse me... this mail shouldnot be on this mailing list but
it is an hurry.
public class TestDouble
{
static public void main(String args[]) {
double val = 0.5055 * 1000 ;
System.out.println( val );
}
}
This program gives me the following results :
505.44
I've tried with Sun Jdk 1.2.2rev9, Sun jdk1.3.1 and Ibm Jdk 1.3.1.
Have u got informations about this ?
Can u try too ?
Thanks a lot and sorry again
Bye
Michenaud Laurent
- Adeuza -
[ Développeur Web - Administrateur Réseau ]
--
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RE: Java and double
Try to use BigDecimal.
It should be OK.
--- Mangi, Rick [EMAIL PROTECTED] wrote:
Ya, I've seen that one before. use the java.math package.
-Original Message-
From: Laurent Michenaud [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, November 14, 2001 10:39 AM
To: [EMAIL PROTECTED]
Subject: Java and double
Hi,
Excuse me... this mail shouldnot be on this mailing list but
it is an hurry.
public class TestDouble
{
static public void main(String args[]) {
double val = 0.5055 * 1000 ;
System.out.println( val );
}
}
This program gives me the following results :
505.44
I've tried with Sun Jdk 1.2.2rev9, Sun jdk1.3.1 and Ibm Jdk 1.3.1.
Have u got informations about this ?
Can u try too ?
Thanks a lot and sorry again
Bye
Michenaud Laurent
- Adeuza -
[ Développeur Web - Administrateur Réseau ]
--
To unsubscribe: mailto:[EMAIL PROTECTED]
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Re: Java and double
Not sure what your point is. The code is okay, check out the internal
math yourself. You can do it by hand. If you want more precision, use
different code.
-Original Message-
From: Mangi, Rick [EMAIL PROTECTED]
To: 'Tomcat Users List' [EMAIL PROTECTED]
Date: Wednesday, November 14, 2001 8:44 AM
Subject: RE: Java and double
Ya, I've seen that one before. use the java.math package.
-Original Message-
From: Laurent Michenaud [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, November 14, 2001 10:39 AM
To: [EMAIL PROTECTED]
Subject: Java and double
Hi,
Excuse me... this mail shouldnot be on this mailing list but
it is an hurry.
public class TestDouble
{
static public void main(String args[]) {
double val = 0.5055 * 1000 ;
System.out.println( val );
}
}
This program gives me the following results :
505.44
I've tried with Sun Jdk 1.2.2rev9, Sun jdk1.3.1 and Ibm Jdk 1.3.1.
Have u got informations about this ?
Can u try too ?
Thanks a lot and sorry again
Bye
Michenaud Laurent
- Adeuza -
[ Développeur Web - Administrateur Réseau ]
--
To unsubscribe: mailto:[EMAIL PROTECTED]
For additional commands: mailto:[EMAIL PROTECTED]
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or lost by any transmission in error. If you are not the
intended recipient you are hereby notified that any use,
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and its affiliates reserve the right to monitor all e-mail
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Re: Java and double
try putting a 1000d (I think you have to tell the vm that this is a
double value or it may try an compute a float!
- Original Message -
From: Micael Padraig Og mac Grene [EMAIL PROTECTED]
Date: Wednesday, November 14, 2001 9:41 am
Subject: Re: Java and double
Not sure what your point is. The code is okay, check out the
internalmath yourself. You can do it by hand. If you want more
precision, use
different code.
-Original Message-
From: Mangi, Rick [EMAIL PROTECTED]
To: 'Tomcat Users List' [EMAIL PROTECTED]
Date: Wednesday, November 14, 2001 8:44 AM
Subject: RE: Java and double
Ya, I've seen that one before. use the java.math package.
-Original Message-
From: Laurent Michenaud [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, November 14, 2001 10:39 AM
To: [EMAIL PROTECTED]
Subject: Java and double
Hi,
Excuse me... this mail shouldnot be on this mailing list but
it is an hurry.
public class TestDouble
{
static public void main(String args[]) {
double val = 0.5055 * 1000 ;
System.out.println( val );
}
}
This program gives me the following results :
505.44
I've tried with Sun Jdk 1.2.2rev9, Sun jdk1.3.1 and Ibm Jdk 1.3.1.
Have u got informations about this ?
Can u try too ?
Thanks a lot and sorry again
Bye
Michenaud Laurent
- Adeuza -
[ Développeur Web - Administrateur Réseau ]
--
To unsubscribe: mailto:[EMAIL PROTECTED]
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AW: Java and double
That changes nothing.
If the left side of an assignment is double,
all numbers to the right are automagically
double. Such helpers are just needed if the
left side has a lower precision than double
(float, int, short, byte)
The only ways to get more precise results:
- use BigDecimal.
- round the number to the number of digits
you are interested in.
- use an extenal Library which higher precision
If there is any, I had no need for so didn't
care to search one.
-Ursprüngliche Nachricht-
Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Gesendet: Mittwoch, 14. November 2001 20:36
An: Tomcat Users List
Betreff: Re: Java and double
try putting a 1000d (I think you have to tell the vm that this is a
double value or it may try an compute a float!
- Original Message -
From: Micael Padraig Og mac Grene [EMAIL PROTECTED]
Date: Wednesday, November 14, 2001 9:41 am
Subject: Re: Java and double
Not sure what your point is. The code is okay, check out the
internalmath yourself. You can do it by hand. If you want more
precision, use
different code.
-Original Message-
From: Mangi, Rick [EMAIL PROTECTED]
To: 'Tomcat Users List' [EMAIL PROTECTED]
Date: Wednesday, November 14, 2001 8:44 AM
Subject: RE: Java and double
Ya, I've seen that one before. use the java.math package.
-Original Message-
From: Laurent Michenaud [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, November 14, 2001 10:39 AM
To: [EMAIL PROTECTED]
Subject: Java and double
Hi,
Excuse me... this mail shouldnot be on this mailing list but
it is an hurry.
public class TestDouble
{
static public void main(String args[]) {
double val = 0.5055 * 1000 ;
System.out.println( val );
}
}
This program gives me the following results :
505.44
I've tried with Sun Jdk 1.2.2rev9, Sun jdk1.3.1 and Ibm Jdk 1.3.1.
Have u got informations about this ?
Can u try too ?
Thanks a lot and sorry again
Bye
Michenaud Laurent
- Adeuza -
[ Développeur Web - Administrateur Réseau ]
--
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printing, copying, forwarding or saving them and notify the
sender immediately by reply e-mail. Zurich Capital Markets
and its affiliates reserve the right to monitor all e-mail
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