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From: Jeff Higgins <jeff@invalid.invalid>
Newsgroups: comp.lang.java.programmer
Subject: Re: Mail alearter in java
Date: Sun, 27 Oct 2013 17:43:02 -0400
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On 10/27/2013 04:17 AM, vasu.ghs@gmail.com wrote:
> Hello everyone,
> i want to develop a mail alearter in java, whose pop up should raise up whn internet connection detected.

Using java-dbus handle connectivity signals from NetworkManager.
Oh, you're on Android, why didn't you say? Simple, register for events 
from ConnectivityManager.
No? Windows? Just register under 
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\NetworkProvider\Notifyees 
- not sure about a pure Java version.
Then just pop-up or mail-out as desired.

> I tried a lot, but no success achieved. Please help me .
>