Java Host Address Get getHostName(String address)

Description

get Host Name

License

Apache License

Declaration

public static String getHostName(String address) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.net.*;

import java.util.HashMap;
import java.util.Map;

public class Main {
    private static final Map<String, String> hostNameCache = new HashMap<String, String>(1000);

    public static String getHostName(String address) {
        try {//from   w w  w  .  java  2  s .c o m
            int i = address.indexOf(':');
            if (i > -1) {
                address = address.substring(0, i);
            }
            String hostname = hostNameCache.get(address);
            if (hostname != null && hostname.length() > 0) {
                return hostname;
            }
            InetAddress inetAddress = InetAddress.getByName(address);
            if (inetAddress != null) {
                hostname = inetAddress.getHostName();
                hostNameCache.put(address, hostname);
                return hostname;
            }
        } catch (Throwable e) {
            // ignore
        }
        return address;
    }
}

Related

1. getHostAddresses()
2. getHostAddresses()
3. getHostAddressFromProperty(final String property)
4. getHostExternalAddr()
5. getHostName(String addr)
6. getHostName(String address)
7. getHostName(String localAddress)
8. getHostnameOrAddress()
9. getHostnameOrAddress()