Java Utililty Methods Host Resolve

List of utility methods to do Host Resolve

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Description

The list of methods to do Host Resolve are organized into topic(s).

Method

URIresolve(String host, String path)
resolve 
URI uri = null;
try {
    uri = new URI(host);
    uri = uri.resolve(path);
} catch (URISyntaxException e) {
    e.printStackTrace();
    return null;
return uri;
StringresolveHost(String hostname)
Resolves hostname and returns ip address as a string. 
try {
    InetAddress addr = InetAddress.getByName(hostname);
    byte[] ipAddr = addr.getAddress();
    StringBuilder ipAddrStr = new StringBuilder(15);
    for (int i = 0; i < ipAddr.length; i++) {
        if (i > 0)
            ipAddrStr.append('.');
        ipAddrStr.append(ipAddr[i] & 0xFF);
...
StringresolveHostname()
Helper utility that calls into the InetAddress system to resolve the hostname. 
try {
    return InetAddress.getLocalHost().getCanonicalHostName();
} catch (java.net.UnknownHostException uhe) { 
    return "unresolvable";
StringresolveHostname()
resolve Hostname 
InetAddress addr;
try {
    addr = InetAddress.getLocalHost();
} catch (UnknownHostException uhe) {
    return "localhost";
return addr.getCanonicalHostName();
StringresolveHostName()
Read hostName from JDK. 
try {
    if (useInetAddress) {
        return InetAddress.getLocalHost().getHostName();
    throw new UnknownHostException("Do not use the Inet Adress");
} catch (UnknownHostException e) {
    throw new IllegalArgumentException("Cannot find the target host by itself", e);
StringresolveHostName(final String hostName)
Resolves the host name and returns its IP address. 
InetAddress address = null;
address = InetAddress.getByName(hostName);
return address.getHostAddress();
StringresolveHostName(String hostname)
Resolves a given hostname by a canonical hostname. 
if (hostname == null || hostname.isEmpty()) {
    return null;
return InetAddress.getByName(hostname).getCanonicalHostName();