Java math library?

Hi all,
Does anyone know a java math-library which provides analysis stuff?
I'd like to generate a function (approximation) which describes a curve.
What I need is an implementation of Lagrange interpolation formula or
Newton interpolation formula.
Google lets me down. Any help would be greatly appreciated!

You could try looking through the list of stuff at http://math.nist.gov/javanumerics/

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ADF: JBO-25009: Cannot create an object of type:java.math.Bi. Jdev 11.1.2.3

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<RichExceptionHandler> <_logUnhandledException> ADF_FACES-60098:Faces lifecycle receives unhandled exceptions in phase INVOKE_APPLICATION 5
javax.el.ELException: oracle.jbo.domain.DataCreationException: JBO-25009: Cannot create an object of type:java.math.BigDecimal from type:java.lang.String with value:Restricted
at com.sun.el.parser.AstValue.invoke(Unknown Source)
at com.sun.el.MethodExpressionImpl.invoke(Unknown Source)
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at oracle.adf.view.rich.component.fragment.ContextSwitchingComponent._processPhase(ContextSwitchingComponent.java:461)
at oracle.adf.view.rich.component.fragment.ContextSwitchingComponent.broadcast(ContextSwitchingComponent.java:134)
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at oracle.jbo.common.JboTypeMapEntries$2.convert(JboTypeMapEntries.java:135)
at oracle.jbo.domain.TypeFactory.get(TypeFactory.java:869)
at oracle.jbo.domain.TypeFactory.getInstance(TypeFactory.java:116)
at oracle.jbo.server.AttributeDefImpl.convertToJava(AttributeDefImpl.java:2220)
at oracle.jbo.server.ViewRowSetImpl.prepKeyForFind(ViewRowSetImpl.java:5377)
at oracle.jbo.server.ViewRowSetImpl.findByKey(ViewRowSetImpl.java:5394)
at oracle.jbo.server.ViewRowSetImpl.findByKey(ViewRowSetImpl.java:5296)
at oracle.jbo.server.ViewRowSetImpl.findByKey(ViewRowSetImpl.java:5290)
at oracle.jbo.server.ViewObjectImpl.findByKey(ViewObjectImpl.java:11628)
at oracle.jbo.uicli.binding.JUCtrlHierNodeBinding.syncTargetIter(JUCtrlHierNodeBinding.java:641)
at oracle.jbo.uicli.binding.JUCtrlHierNodeBinding.internalSetCurrentRow(JUCtrlHierNodeBinding.java:617)
at oracle.jbo.uicli.binding.JUCtrlHierNodeBinding.syncCurrentRow(JUCtrlHierNodeBinding.java:547)
at oracle.jbo.uicli.binding.JUCtrlHierNodeBinding.setRowAsCurrentOnTargetIterator(JUCtrlHierNodeBinding.java:561)
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at oracle.adfinternal.view.faces.model.binding.FacesCtrlHierBinding$FacesModel.makeCurrent(FacesCtrlHierBinding.java:685)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
... 58 more
Caused by: java.lang.NumberFormatException
at java.math.BigDecimal.<init>(BigDecimal.java:459)
at java.math.BigDecimal.<init>(BigDecimal.java:728)
at oracle.jbo.common.JboTypeMapEntries$2.convert(JboTypeMapEntries.java:129)
... 76 more
Please can you let me know how I can resolve this issue.
Thanks

Hi, I have rechecked this issue. In the bug they say that Big Integer should be changed to Big Decimal to resolve the issue. I checked my application and saw that there is no Big Interger. Please can you guide me further.

Can fdlibm (native math library) be replaced?

Looking at the jdk1.4.1 source code java.lang.Math class delegates most of its calls to java.lang.StrictMath. According to the documentation, the native calls in StrictMath are done in fdlibm. Does anyone know where/how fdlibm is loaded? Is this library accessed via JNI or some other jvm-specific mechanism? The reason why I am asking this is because I would like to replace fdlibm by a different (much faster) math library without incurring JNI method call overhead. Is this possible or am I stuck using my own native math library accessed via JNI? On my system, using the system native math library (libm), the time required to calculate sin(x) is about the same as the JNI method call overhead?
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Just because the source for java.lang.Math appears to delegate the calculation to StrictMath, doesn't mean that the JVM actually does this. It can easily replace these methods with something else provided that the specification is observed. It is clear from timing the calls that Math.sin is faster than StrictMath.sin although still significantly slower than the Intel FSIN instruction. The Math code appears to be reducing the argument range to +-PI/4 using the technique used in fdlibm and then using FSIN on this reduced range.

Math library not generating errno values or SIGFPE on Intel!!

Hello. I posted this a long while back and got no responses, so I decided to ask again. I am writing a calculator, and it is not very nice for testing if I have to wind up with this:
<pre style="width: 600px; background-color: #F0F0F0">$ hoc
sqrt(-4)
nan
atan2(0,0)
0
pow(-4, 1/2)
nan
1e4000 * 1e4000
inf
(-1e4000) * (1e40000)
-inf
1e-40000
0
</pre>
My program handles SIGFPE and there is a function errcheck() that checks the value of errno. It seems like the atan2(), pow(), and sqrt() functions do not assign to errno like they should. I'm running on an Intel Mac, and it makes making sure this calculator works right a big pain. Does anyone PLEASE know how to fix this? THANKS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

What x-bc does is: convert long function names (sin(), ...) to the short ones (s(), ...), save the final result in a temporary file, and just pipe bc -lq (include math library, no GNU bc banner) redirecting standard input to that temporary file over to their GTK+ text box. There's something that has to do with GNU bc then, and that results in a weird value (1) in my testing...
PS - The file is src/main_window.cc; function int main_window::executeBc() - on version 2.0: lines 376 through 408. The code that does converting long to short is unknown to me.
Message was edited by: andlabs
Message was edited by: andlabs

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Why don't u use a class loader. Try this code
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Cast to a literal (ex. "java.math.BigDecimal")

I have an array with 2 columns like:
"java.math.BigDecimal", "2"
"java.lang.String", "Test 01"
"java.math.BigDecimal","120"
"java.math.BigDecimal","148"
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thanks in advance,
intovoid

You could do this by reflection for classes which
have a contructor which takes an single string
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Lot's of messy expections to field. The sequence
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I encountered a problem related to some functions provided by math library on sun. I narrowed it down to the following test program:
========================================================
#include<stdio.h>
#include<math.h>
void pow_res()
double x = 10.0;
double y = 2.5;
printf("pow(%.2e, %.2e):%.20e\n", x, y, pow(10.0, 2.5));
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double x = -6.433230338433114370e-02;
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========================================================
The above test program has to be linked with any math library. It is �libm� for amd64/linux, but for sparc we have choice between �libm� and �libmopt�. I am compiling above program with "cc <test_program.c> <-lm/-lmopt>" command.
On sparc, if the above test program is getting linked with �-lm" then it gives same results for the �cos� on both amd64 and sparc, but gives different results (16th decimal digit onward) for �pow�. If it is getting linked with �-lmopt� then it gives same result for the �pow� on both the platforms, but gives different results for �cos�. Linux results match with the amd64 results.
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Amd64:
gcc version: 3.3.6
OS: RedHat Enterprise Linux 3.0 U7 (Linux 2.4.21-40.ELsmp x86_64)
Sparc:
cc version: Sun C 5.8 Patch 121015-01
OS: SunOS 5.9 Generic_118558-21 sun4u sparc SUNW,Sun-Fire-280R
It will be great if somebody can explain the problem and the solution to get rid of it.
Many thanks,
Sunil

Transcendental functions are not specified to be correctly rounded in the same
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The main payoff of correctly rounded transcendental functions is that they
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accuracy to almost 20 digits on x86 and over 30 digits on SPARC, and while
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The SPARC long double implementation is in software rather than hardware,
and so entails a major performance reduction compared to double.
The Numerical Computation Guide at docs.sun.com discusses many of these
issues at greater length.

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Cross-posted at http://forum.java.sun.com/thread.jsp?thread=293132&forum=54&message=1155073

Package java.math does not exist!!!

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i mounted almost a million times in diff ways but it still can't compileIf it takes one minute for each mount then total time you have taken = 10000000 minutes = 166666 hours = 6944 days = 19 years (roughly). Java was not there 19 years ago.
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This code returns only the a value
java.math.BigDecimal a = new java.math.BigDecimal(0);
java.math.BigDecimal a = new java.math.BigDecimal(23);
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For your kind information, the code does not return any value. You are supposed to save the return value from the add() function call. Something like this:
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