Here you can find the source of bigDecimalValue(final Number number)
private static BigDecimal bigDecimalValue(final Number number)
//package com.java2s; /*//from www . j a va 2 s .c o m * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */ import java.math.BigDecimal; import java.math.BigInteger; public class Main { private static BigDecimal bigDecimalValue(final Number number) { if (number == null) return null; if (number instanceof BigDecimal) return (BigDecimal) number; if (number instanceof BigInteger) return new BigDecimal((BigInteger) number); return (number instanceof Double || number instanceof Float) ? BigDecimal.valueOf(number.doubleValue()) : BigDecimal.valueOf(number.longValue()); } }