IndirizzoIP.java

import java.net.InetAddress;
import java.net.URL;

import java.util.Scanner;

import java.io.IOException;

import java.awt.Toolkit;
import java.awt.datatransfer.StringSelection;
import java.awt.datatransfer.Clipboard;


public class IndirizzoIP {
	public static void main(String[] args) {
		
		System.out.println("\nUn saluto da Stefano!\nDi seguito sono visualizzati IP nella rete locale e globale.\n");
		
		String extIP = "";
		InetAddress i;
		
		try {
			i = InetAddress.getLocalHost();
			System.out.println("Nome Computer/IP Locale: " + i);
		} catch (Exception e) {
			e.printStackTrace();
		}
		
		try {
			URL url = new URL("http://checkip.amazonaws.com/");
			Scanner s = new Scanner(url.openStream());
			extIP = s.next();
			System.out.println("\nIP Esterno: " + extIP);
		} catch (IOException ex) {
			// there was some connection problem, or the file did not exist on the server,
		    // or your URL was not in the right format.
		    // think about what to do now, and put it here.
		    ex.printStackTrace(); // for now, simply output it.
		}
		
		System.out.println("\nVersione 2.1.2, compilata il 25-11-17 alle 09:51");
		
		System.out.println("Se vuoi copiare l'IP, scrivi C (+ INVIO), altrimenti premi solo INVIO.");
		
		Scanner sc = new Scanner(System.in);
		String ch = sc.nextLine();
		
		if(ch.length() != 0)
			if(ch.charAt(0) == 'c' || ch.charAt(0) == 'C') {
				StringSelection selection = new StringSelection(extIP);
				Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
				clipboard.setContents(selection, selection);
			}
		
	}
}