Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright 2015 Yan Zhenjie
 *
 * 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.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
                    "::" + "(([0-9A-Fa-f]{1,4}(:[0-9A-Fa-f]{1,4}){0,5})?)$");

    /**
     * Check whether the parameter is effective compression IPv6 address.
     *
     * @param input IPV6 address.
     * @return True or false.
     * @see #isIPv6StdAddress(String)
     */
    public static boolean isIPv6HexCompressedAddress(final String input) {
        int colonCount = 0;
        for (int i = 0; i < input.length(); i++) {
            if (input.charAt(i) == ':') {
                colonCount++;
            }
        }
        return colonCount <= 7 && IPV6_HEX_COMPRESSED_PATTERN.matcher(input).matches();
    }
}