ExampleJavaList/src/com/company/Main.java

package com.company;

import java.io.IOException;

public class Main {

    public static void main(String[] args) throws Throwable {
        Bank.setName("Сберыч");
//        Bank.saveClients();
        Bank.loadClients();
//        Bank.saveBills();
        Bank.loadBills();

        Task task = new Task();
        task.start();

        try {
            Server server = new Server();
            server.Run();
        } catch (IOException exception) {
            System.out.println(exception.getMessage());
        }

        task.interrupt();
        task.join();
    }
}

class Task extends Thread {
    @Override
    public void run() {
        while (!isInterrupted()) {

            Bank.showClientsInfo();

            try {
                Thread.sleep(5000);
            } catch (InterruptedException exception) {
                System.out.println(exception.getMessage());
            }
        }
    }
}