Java URL to Host Name getHost(String url)

Description

get Host

License

Apache License

Declaration

public static String getHost(String url) 

Method Source Code

//package com.java2s;
/*// w w w .  j ava 2s  .  c o m
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.net.URI;
import java.net.URISyntaxException;

public class Main {
    public static String getHost(String url) {
        //return InternetDomainName.from(url).topPrivateDomain().toString();
        /*if () {
        return InternetDomainName.from(url).topPrivateDomain().toString();
        } else {
        System.out.println("Omg, It's not a valid URL: " + url);
        return "";
        }*/

        URI uri = null;
        try {
            uri = new URI(url);
        } catch (URISyntaxException e) {
            System.out.println("Omg, It's not a valid URL: " + url);
            // Do Nothing & Return Empty ""
            return "";
        }
        String host = uri.getHost();
        if (host != null) {
            if (host.startsWith("www.")) {
                return host.substring(4);
            } else {
                return host;
            }
        } else {
            System.out.println("Omg, www not present: " + url);
            return "";
        }
    }
}

Related

1. getHost(String url)
2. getHost(String url)
3. getHost(String url)
4. getHost(String url)