Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
import java.util.regex.Pattern;

public class Main {
    private static final Pattern IPV6_HEX_COMPRESSED_PATTERN = Pattern
            .compile("^(([0-9A-Fa-f]{1,4}(:[0-9A-Fa-f]{1,4}){0,5})?)" + // 0-6 hex fields
                    "::" + "(([0-9A-Fa-f]{1,4}(:[0-9A-Fa-f]{1,4}){0,5})?)$");
    private static final char COLON_CHAR = ':';
    private static final int MAX_COLON_COUNT = 7;

    /**
     * Checks whether the parameter is a valid compressed IPv6 address
     *
     * @param input
     *            the address string to check for validity
     * @return true if the input parameter is a valid compressed IPv6 address
     */
    public static boolean isIPv6HexCompressedAddress(final String input) {
        int colonCount = 0;
        for (int i = 0; i < input.length(); i++) {
            if (input.charAt(i) == COLON_CHAR) {
                colonCount++;
            }
        }
        return colonCount <= MAX_COLON_COUNT && IPV6_HEX_COMPRESSED_PATTERN.matcher(input).matches();
    }
}