Java Sessions

package torrete;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
import java.io.FileReader;
import java.util.Scanner;

public class Torrete {

    private static String usr = "nasty";
    private static String pwd = "lala";
    private static String pass = usr+"."+pwd;

    private static User user;

    public static void main(String[] args) {
        checkCache();
        System.out.println("lala");
    }

    public static void checkCache() {
        String data = null;
        try {
            BufferedReader br = new BufferedReader(new FileReader("cache.txt"));
            data = br.readLine();
        } catch(IOException e) {
            e.printStackTrace();
        }
        Boolean logged = pass.equals(data);
        if(!logged) {
            login();
        } else {
            System.out.println(pass);
            user = new User(usr);
        }
    }

    public static void login() {
        Scanner in = new Scanner(System.in);
        System.out.print("nombre: ");
        String n = in.next();
        System.out.print("clave: ");
        String c = in.next();
        if(n.concat(".").concat(c).equals(pass)) {
            user = new User(n);
            saveCache();
        } else {
            System.out.println("Login bad!! bye:$");
            System.exit(0);
        }
    }

    public static void saveCache() {
        try {
            BufferedWriter bw = new BufferedWriter(new FileWriter("cache.txt"));
            bw.write(pass);
            bw.flush();
            System.out.println("Cache saved!");
        } catch(IOException e) {
            e.printStackTrace();
        }
    }

    public static class User {
        public String name;
        public User(String name) {
            this.name = name;
            System.out.println("Hello ".concat(this.name));
        }
    }

}