Java Utililty Methods IP Address Mash

List of utility methods to do IP Address Mash

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Description

The list of methods to do IP Address Mash are organized into topic(s).

Method

StringcheckIpMask(String ip)
check Ip Mask 
String ipParts[] = ip.split("\\.");
if (ipParts.length != 4)
    return "IP address must have 4 parts";
String message = checkIpMaskPart(ipParts[0]);
if (message != null)
    return message;
message = checkIpMaskPart(ipParts[1]);
if (message != null)
...
StringcheckIpMaskPart(String part)
check Ip Mask Part 
if ("*".equals(part))
    return null;
int dash = part.indexOf('-');
try {
    if (dash == -1) {
        int value = Integer.parseInt(part);
        if (value < 0 || value > 255)
            return "Value out of range in '" + part + "'";
...
StringcheckIpMaskPart(String part)
check Ip Mask Part 
int dash;
if ("*".equals(part))
    return null;
dash = part.indexOf('-');
if (dash == -1) {
    int value = Integer.parseInt(part);
    if (value < 0 || value > 255)
        return (new StringBuilder()).append("Value out of range in '").append(part).append("'").toString();
...