import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

public class Test1 {

    public Test1() {
    }

    public static void main(String[] args) {
        
        System.out.println("utente cambiato?" + "\n" + sameUSERS());
        writeLastUser(getUserFile(), getCurrUser());
    }

    private static boolean sameUSERS() {
        return myEQUALS(getCurrUser(), readLastUser());
    }

    private static String getCurrDir() {
        return System.getProperty("user.dir");
    }

    private static String getCurrUser() {
        return System.getProperty("user.name");
    }

    private static void writeLastUser(File f, String s) {
        BufferedWriter writeSTR;
        try {
            if (!f.exists()) {
                f.createNewFile();
            }
            writeSTR = new BufferedWriter(new FileWriter(f, false));
            writeSTR.write(s);
            writeSTR.close();
        } catch (IOException ex) {
            System.err.println("" + ex.getMessage());
        }
    }

    private static String readLastUser() {
        String s, string = null;
        BufferedReader readSTR;
        try {
            readSTR = new BufferedReader(new FileReader(getUserFile()));
            while ((s = readSTR.readLine()) != null) {
                string = s;
            }
            readSTR.close();
        } catch (IOException ex) {
            System.err.println("" + ex.getMessage());
        }
        return string;
    }

    private static File getUserFile() {
        return new File(getCurrDir(), "userSTR.info");
    }

    public static boolean myEQUALS(String a, String b) {
        if (a.length() == b.length()) {
            for (int i = 0; i < a.length(); i++) {
                return a.charAt(i) == b.charAt(i);
            }
        }
        return false;
    }
  
}