Finding an IP address using Java (was: do u know?)

How to get IP Address of all PC through java program

Newbie Poster

8 posts since Aug 2004

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what do you mean for example i have a java script on one of my sites that tells the user visiting the site what there ip adress is. or are you trying to find all ur ip info cuz then you dont need a java program just goto run

mikeandike22

Nearly a Posting Virtuoso

1,496 posts since May 2004

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7 Years Ago

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I tell you the way round ...

Process p = Runtime.Runtime().exec("ipconfig");

or just type another command for finding what computers are connected to your computer ( see net commands )

if you have linux or something .... write the commands over ipconfig.

nanosani

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Team Colleague

1,830 posts since Jul 2004

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7 Years Ago

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The best way to obtain IP address is via the JDK's InetAddress
http://java.sun.com/j2se/1.4.2/docs/api/java/net/InetAddress.html#getLocalHost()

This returns InetAddress which has many goodies you can play around with.

For example, You can do things like reverse domain name loook ups on arbitrary ipaddresses... or ip addresses from hostnames.
http://www.cs.ucl.ac.uk/staff/sjiang/webpage/reverse-lookup-test.htm

By the way Nice Runtime Trick nanosani... it doesn't work if the host is running a secure classloader though... or another OS withouth ipconfig for that matter. =\

cosi

Junior Poster

153 posts since Aug 2004

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2 Years Ago

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How to discover the local area network in java?

divakar.durai

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1 post since Dec 2009

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