Admin: 1 версия

2010-06-01T05:03:24Z

1 версия

в 17:44, 31 мая 2010

2010-05-31T17:44:27Z

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== Compare two InetAddresses ==



<source lang="java">
import java.net.InetAddress;
public class MainClass {
public static void main(String args[]) throws Exception {
InetAddress ca = InetAddress.getByName("www.google.ca");
InetAddress com = InetAddress.getByName("www.google.ru");
if (ca.equals(com)) {
System.out.println("same");
} else {
System.out.println("not the same");
}
}
}</source>



<pre class=codeResult>not the same</pre>

== Create InetAddress by Name ==



<source lang="java">
import java.net.InetAddress;
public class MainClass {
public static void main(String[] args) {
try {
InetAddress ia = InetAddress.getByName("64.21.29.37");
System.out.println(ia.getHostName());
} catch (Exception ex) {
System.err.println(ex);
}
}
}</source>



== Get All addresses by name ==



<source lang="java">
import java.net.*;
public class MainClass {
public static void main (String[] args) {
try {
InetAddress[] addresses = InetAddress.getAllByName("www.google.ru");
for (int i = 0; i < addresses.length; i++) {
System.out.println(addresses[i]);
}
}
catch (UnknownHostException e) {
System.out.println("Could not find www.apple.ru");
}
}
}</source>



<pre class=codeResult>www.google.ru/72.14.253.147
www.google.ru/72.14.253.99
www.google.ru/72.14.253.103
www.google.ru/72.14.253.104</pre>

== Get canonical host name ==



<source lang="java">
import java.net.InetAddress;
public class Main {
public static void main(String[] argv) throws Exception {
byte[] ipAddr = new byte[] { 127, 0, 0, 1 };
InetAddress addr = InetAddress.getByAddress(ipAddr);
String hostnameCanonical = addr.getCanonicalHostName();
}
}</source>



== Get Host name from InetAddress ==



<source lang="java">
import java.net.InetAddress;
import java.net.UnknownHostException;
public class MainClass {
public static void main(String[] args) {
try {
InetAddress address = InetAddress.getLocalHost();
System.out.println("My name is " + address.getHostName());
} catch (UnknownHostException e) {
System.out.println("I"m sorry. I don"t know my own name.");
}
}
}</source>



== Get local host from InetAddress ==



<source lang="java">
import java.net.InetAddress;
import java.net.UnknownHostException;
public class MainClass {
public static void main(String[] args) {
try {
InetAddress me = InetAddress.getLocalHost();
String dottedQuad = me.getHostAddress();
System.out.println("My address is " + dottedQuad);
} catch (UnknownHostException e) {
System.out.println("I"m sorry. I don"t know my own address.");
}
}
}</source>



== Get my own address ==



<source lang="java">
import java.net.InetAddress;
public class MainClass {
public static void main(String[] args) {
try {
InetAddress me = InetAddress.getLocalHost();
String dottedQuad = me.getHostAddress();
System.out.println("My address is " + dottedQuad);
} catch (Exception ex) {
ex.printStackTrace();
}
}
}</source>



== Getting the IP Address of a Hostname ==



<source lang="java">
import java.net.InetAddress;
public class Main {
public static void main(String[] argv) throws Exception {
InetAddress addr = InetAddress.getByName("www.google.ru");
System.out.println(addr.getHostAddress());

}
}</source>



== java.net.InetAddress.isReachable(int) can be used to check if a server is reachable or not. ==



<source lang="java">
import java.net.InetAddress;
public class Main {
public static void main(String[] argv) throws Exception {
InetAddress address = InetAddress.getByName("web.mit.edu");
System.out.println("Name: " + address.getHostName());
System.out.println("Addr: " + address.getHostAddress());
System.out.println("Reach: " + address.isReachable(3000));
}
}</source>



== Ping a host ==



<source lang="java">
import java.net.InetAddress;
public class Main {
public static void main(String[] args) throws Exception {
InetAddress address = InetAddress.getByName("17.16.15.14");
boolean reachable = address.isReachable(10000);
System.out.println("Is host reachable? " + reachable);
}
}</source>



== Translate host names to Internet addresses ==



<source lang="java">
import java.net.InetAddress;
import java.net.UnknownHostException;
public class MainClass {
public static void main(String args[]) {
try {
InetAddress inetAddr = InetAddress.getByName("www.jexp.ru");
System.out.println(inetAddr.toString());
} catch (UnknownHostException ex) {
}
}
}</source>



<pre class=codeResult>www.jexp.ru/208.109.14.69</pre>

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Java Tutorial/Network/Internet Addresses - История изменений

Admin: 1 версия

в 17:44, 31 мая 2010