Here you can find the source of toBigInteger(@Nullable final BigDecimal value)
public static BigInteger toBigInteger(@Nullable final BigDecimal value)
//package com.java2s; /*/*ww w . j a v a 2 s .co m*/ * Copyright (c) 2014 Haixing Hu * * Licensed 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; import javax.annotation.Nullable; public class Main { public static BigInteger toBigInteger(@Nullable final BigDecimal value) { return (value == null ? null : value.toBigInteger()); } public static BigInteger toBigInteger(@Nullable final BigDecimal value, @Nullable final BigInteger defaultValue) { return (value == null ? defaultValue : value.toBigInteger()); } }