Questions tagged [inetaddress]
218 questions
99
votes
12 answers
Why does InetAddress.isReachable return false, when I can ping the IP address?
InetAddress byName = InetAddress.getByName("173.39.161.140");
System.out.println(byName);
System.out.println(byName.isReachable(1000));
Why does isReachable return false? I can ping the IP.
jiafu
- 5,742
- 10
- 41
- 69
88
votes
2 answers
Java: Convert a String (representing an IP) to InetAddress
Possible Duplicate:
Is there an easy way to convert String to Inetaddress in Java?
I'm trying to convert a string(representing an IP address, e.g. 10.0.2.50) into an InetAddress obj.
According to the API it is possible to create an Object…
rob
- 2,498
- 5
- 20
- 37
42
votes
2 answers
Get IP address with URL string? (Java)
In my program a user enters a url string, say
http://www.engineering.uiowa.edu/~hawkeng//fall01/graphics/potato.gif
how would I get the IP address of this url? I tried using
InetAddress address = InetAddress.getByName(urlStr);
but the result…
user1205853
- 621
- 2
- 8
- 13
32
votes
1 answer
Host Name Vs Canonical Host Name
Can anyone please explain me the difference between Host Name and Canonical Host Name?
I am currently using InetAddress class to fetch host name using the IP Address. I came across these 2 APIs.
So I am just wondering, which one I should opt for?
Aryan
- 1,467
- 2
- 19
- 34
30
votes
10 answers
Java: convert int to InetAddress
I have an int which contains an IP address in network byte order, which I would like to convert to an InetAddress object. I see that there is an InetAddress constructor that takes a byte[], is it necessary to convert the int to a byte[] first, or…
kdt
- 26,008
- 26
- 82
- 130
27
votes
5 answers
Is there an easy way to convert String to Inetaddress in Java?
I am trying to convert strings into Inetaddress. I am not trying to resolve hostnames: the strings are ipv4 addresses. Does InetAddress.getByName(String host) work? Or do I have to manually parse it?
TiansHUo
- 8,049
- 6
- 42
- 57
15
votes
2 answers
Getting My LAN ip address (192.168.xxxx) (IPV4)
In my android device I am trying to find its IP address(IPV4).
If I do the following code
InetAddress inet = InetAddress.getLocalHost();
System.out.println(inet.getHostAddress()); //giving me 127.0.0.1
The code is giving me 127.0.0.1.
I wanted to…
Vishnudev K
- 2,574
- 3
- 22
- 42
13
votes
2 answers
How to store both IPv4 or IPv6 in single column in SQL Server?
Should I use binary(16) or varbinary(16)?
I know I can use getAddress() in java.net.InetAddress (Java) or System.Net.IPAddress (C#) to get a byte[] representation of both IPv4 and IPv6, but if I need to insert IPv4 i.e. binary(4) into a binary(16)…
Henry
- 31,972
- 19
- 112
- 214
12
votes
3 answers
DNS query in JAVA
I am messing around with DNS services in Java - I am specifically trying to lookup all google.com addresses and display them in an array, similar to running a lookup using nslookup:
nslookup -q=TXT _netblocks.google.com 8.8.8.8
I am using…
zJK
- 121
- 1
- 1
- 3
12
votes
1 answer
How can I bind serversocket to specific IP?
If I have a String representing an IP address (IPv4 or IPv6) how can I create a ServerSocket and bind to this IP without caring if the IP passed in, is IPv4 or IPv6?
I see that there is a constructor:ServerSocket(int port, int backlog, InetAddress…
Jim
- 17,102
- 31
- 115
- 227
10
votes
1 answer
Java Getting IPv4 Address
Regarding this link where using the codes provided to produce the IP addresses.
String ip;
try {
Enumeration interfaces = NetworkInterface.getNetworkInterfaces();
while (interfaces.hasMoreElements()) {
…
Fouzy
- 127
- 1
- 1
- 6
9
votes
3 answers
Increment IP address
In that program I want to increment IP address. And I see output like that:
125.23.45.67
126.23.45.67
127.23.45.67
128.23.45.67
129.23.45.67
130.23.45.67
131.23.45.67
132.23.45.67
133.23.45.67
134.23.45.67
But I want to see output like…
d_pilot
- 179
- 1
- 2
- 12
9
votes
1 answer
JAVA Specifying port with InetAddress
I am using InetAddress to determine if my server is online.
If the server is offline it will restart the server.
This process loops every 5 minutes to check once again if the server is online.
It works fine but now I need to figure out how to…
Cloudnine1999
- 93
- 1
- 1
- 5
8
votes
1 answer
Java InetAddress.isReachable() timeout
I am trying to find out if specific hosts on my network are reachable.
My java code is as follows:
InetAddress adr = InetAddress.getByName(host);
if(adr.isReachable(3000)){
System.out.println(host + " is reachable");
}
This works quite well,…
Jerome
- 275
- 2
- 7
7
votes
3 answers
Obtain FQDN in Java
I am trying to obtain the FQDN of a windows machine in my domain, using Java code.
I have tried the InetAddress.getByName("machine-1").getCanonicalHostName() but only returns the machine name.
On the other hand if I ping "machine-1" I get the fully…
hgonzalez
- 81
- 1
- 2