Java URL to Host Name getHostName(String url)

Description

get Host Name

License

Open Source License

Declaration

public static String getHostName(String url) throws MalformedURLException 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.net.MalformedURLException;

public class Main {
    public static String getHostName(String url) throws MalformedURLException {
        if (url == null || url.length() == 0)
            return "";
        url = url.toLowerCase();/*from  ww w . j a v  a2 s  . c  om*/
        if (!url.startsWith("http://") && !url.startsWith("https://") && !url.startsWith("ftp://"))
            throw new MalformedURLException("Unknown schema!");

        int doubleslash = url.indexOf("//");
        doubleslash += 2;

        int end = url.length();

        int idx = url.indexOf('/', doubleslash);
        if (idx > 0 && idx < end)
            end = idx;

        idx = url.indexOf(':', doubleslash);
        if (idx > 0 && idx < end)
            end = idx;

        idx = url.indexOf('&', doubleslash);
        if (idx > 0 && idx < end)
            end = idx;

        idx = url.indexOf('=', doubleslash);
        if (idx > 0 && idx < end)
            end = idx;

        idx = url.indexOf('#', doubleslash);
        if (idx > 0 && idx < end)
            end = idx;

        idx = url.indexOf('?', doubleslash);
        if (idx > 0 && idx < end)
            end = idx;

        return url.substring(doubleslash, end);
    }
}

Related

1. getHostAndPort(final URL url)
2. getHostAndPortFromUrl(String url)
3. getHostFromURL(final String urlSpec)
4. getHostname(String completeUrl)
5. getHostName(String url)
6. getHostName(String url)
7. getHostName(String url)
8. getHostname(String urlStr)
9. getHostSegments(URL url)