Java's BigDecimal.power(BigDecimal exponent): Is there a Java library that does it? [closed]

Question

Java's BigDecimal.pow(int) method only accepts an integer parameter, no BigDecimal parameter.

Is there a library, like Apache's commons-lang, that supports BigDecimal.pow(BigDecimal)? It should be able to do calculate "1.21".pow("0.5") to return "1.1".

Answer 1

There is a Math.BigDecimal implementation of core mathematical functions with source code available from the Cornell University Library here (also you can download the library as a tar.gz). Here is a sample of the library use:

import org.nevec.rjm.*; import java.math.BigDecimal;  public class test {     public static void main(String... args) {         BigDecimal a = new BigDecimal("1.21");         BigDecimal b = new BigDecimal("0.5");          System.out.println(BigDecimalMath.pow(a, b).toString());     } } 

Prints out:

1.1 

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Update

The license information is now clear in the May 2015 update:

The full source code is made available under the LGPL v3.0.

Answer 2

Havent used, but saw suanshu. An open source version in github (https://github.com/nmdev2020/SuanShu).

BigDecimalUtils has a pow() which suits your needs

public static java.math.BigDecimal pow(java.math.BigDecimal a,                                        java.math.BigDecimal b) Compute a to the power of b.