Java Text Parse textToNumericFormatV4(String ipString)

Description

text To Numeric Format V

License

Apache License

Declaration

private static byte[] textToNumericFormatV4(String ipString) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

public class Main {
    private static final int IPV4_PART_COUNT = 4;

    private static byte[] textToNumericFormatV4(String ipString) {
        String[] address = ipString.split("\\.", IPV4_PART_COUNT + 1);
        if (address.length != IPV4_PART_COUNT) {
            return null;
        }/*from  w ww .  jav  a  2  s . com*/

        byte[] bytes = new byte[IPV4_PART_COUNT];
        try {
            for (int i = 0; i < bytes.length; i++) {
                bytes[i] = parseOctet(address[i]);
            }
        } catch (NumberFormatException ex) {
            return null;
        }

        return bytes;
    }

    private static byte parseOctet(String ipPart) {
        int octet = Integer.parseInt(ipPart);
        if (octet > 255 || (ipPart.startsWith("0") && ipPart.length() > 1)) {
            throw new NumberFormatException();
        }
        return (byte) octet;
    }
}

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