Java BigInteger Calculate getIpv4AddrFromNumber(BigInteger addr)

Description

get Ipv Addr From Number

License

Apache License

Declaration

public static String getIpv4AddrFromNumber(BigInteger addr) 

Method Source Code

//package com.java2s;
/*//from  w w  w .ja  v a  2 s.c  o  m
 * Copyright 2011,2015 agwlvssainokuni
 *
 * 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.BigInteger;

public class Main {

    public static String getIpv4AddrFromNumber(BigInteger addr) {

        String[] field = new String[4];
        BigInteger unit = BigInteger.valueOf(0x100L);

        BigInteger number = addr;
        for (int i = field.length - 1; i >= 0; i--) {
            BigInteger[] div = number.divideAndRemainder(unit);
            number = div[0];
            field[i] = div[1].toString(10);
        }

        StringBuilder builder = new StringBuilder(field[0]);
        for (int i = 1; i < field.length; i++) {
            builder.append(".");
            builder.append(field[i]);
        }
        return builder.toString();
    }
}

Related

1. getHexString(BigInteger bigInt)
2. getHistogramBigInt(List data, int breaks)
3. getIntegral(String number, BigInteger def)
4. getInterfaceName(final BigInteger datapathid, final String portName, final Integer vlanId)
5. getIpAddressByBigInteger(BigInteger[] bigs)
6. getIpv6AddrFromNumber(BigInteger addr)
7. getJsonFromBigIntArray(JsonGenerator jg, BigInteger[] array, String pf)
8. getKeyFromBigInteger(final BigInteger value, final int numBytes)
9. getKnownDynamicmacFlowRef(short tableId, BigInteger dpId, long lporTag, String macAddress, long elanTag)