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javanetwork-programmingip-addresslocalhostinetaddress
Lars Andren
Lars Andren

Reputation: 8781

InetAddress getLocalHost() does not return expected IP address from C:\WINDOWS\system32\drivers\etc\hosts

In the file C:\WINDOWS\system32\drivers\etc\hosts I have only the following line

192.168.0.23    computername.domain.com   computername

When I run

InetAddress localhost = InetAddress.getLocalHost();
System.out.println("getLocalHost:" + localhost);

I would expect the output to be

getLocalHost:computername/192.168.0.23

but it comes out as

getLocalHost:computername/192.168.0.107

Any ideas on why this happens? Should the configuration be made in some other file (too)?

EDIT

InetAddress.getByName('computername')

produces the same IP as getLocalHost() does.

Upvotes: 4

Views: 19384

Answers (2)

user545680
user545680

Reputation:

getLocalHost() returns the actual IP of one of your network adapters. If you do ipconfig in your command line one of your adapters should return the same address.

If you have multiple adapters and want a specific one, you will need to use NetworkInterface.getNetworkInterfaces() and then pull the list of InetAddresses from each interface.

Upvotes: 15

no.good.at.coding
no.good.at.coding

Reputation: 20371

Why would entries from the hosts file affect the IP address for localhost?

InetAddress.getByName('computername') should give you the IP address you expect.

Upvotes: 4

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