Here you can find the source of pow(Number x, Number exponent)
public static double pow(Number x, Number exponent)
//package com.java2s; // Licensed under the Apache License, Version 2.0 (the "License"); public class Main { public static double pow(Number x, Number exponent) { return Math.pow(x.doubleValue(), exponent.doubleValue()); }/*from w w w . j a va2s .c o m*/ }