public static  String IP()
{
String ip = "";
try
{
String hostName = InetAddress.getLocalHost().getHostName();
InetAddress[] ipList = InetAddress.getAllByName(hostName);
for(int i = 0;i < ipList.length;i++)
{
ip = ipList[i].getHostAddress();
}
}
catch(Exception e)
{
//T.Mess(null,e.getMessage());
}
return ip;
}

Use the following code to find your ip address:

public class NetInfo {
public static void main(String[] args) {
new NetInfo().say();
}

public void say() {
try {
java.net.InetAddress i = java.net.InetAddress.getLocalHost();
System.out.println(i); // name and IP address
System.out.println(i.getHostName()); // name
System.out.println(i.getHostAddress()); // IP address only
}
catch(Exception e){e.printStackTrace();}

}
}


To send message to client and disconnect, use the link stackoverflow.com/.../how-can-i-get-my-java-chat-client-and-server-to-exchange-messages-from-a-textfie . If you want to view your external ip address visit http://www.ip-details.com/ .