Java code to test network connectivity

Hi,
I want to write a java code to test the speed of network. I want to use the www.google.com as url for testing my network speed. I need to perform the following operations :
1) ping
2) Sockets
3) http
4) DNS resolution

How to i perform all these operation in java ie. how do i ping the www.google.com and get the result in java ?
Similarly i want to check how long it takes to make a sockets connection with google and how long http calls take and DNS resolution.


Thanks
Rohit BajajAsked:
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Ali Can AlbayrakSoftware EngineerCommented:
I strongly recommend you to check out ICMP4J. Do not re-invent the wheel, If you are willing to use 3rd party lib
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Rohit BajajAuthor Commented:
Is there no simple way in java to create a socket and send some data and get the response just to see the rountrip time ?

I want to calculate the roundtrip time to google.
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Ali Can AlbayrakSoftware EngineerCommented:
Here I posted sample code. It checks connectivity first then pings for once.
You may remove connection test part for your constraints. Because it checks connectivity over HTTP protocol.
ConnectivityTest.java
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Rohit BajajAuthor Commented:
Hi
Thanks for the code.
Its good
But i nees some other way to fo for ping command in java as i will be testing this on an app on android phone.
I think in that case checking for operating system and executing the ping command wont work.
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