Create a new version of paste:

package LAB6bun;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.time.LocalDate;
import java.util.Vector;
import java.util.stream.Collectors;
import java.util.stream.Stream;

public class Main {

	public static void main(String[] args) throws NumberFormatException, IOException {

		int optiune;
		BufferedReader buf= new BufferedReader(new InputStreamReader(System.in));
		Vector<Banca> banci=new Vector<Banca>();
		String denumire;


		do {
			System.out.println("0");
			System.out.println("1");
			System.out.println("2");
			System.out.println("3");
			System.out.println("4");
			System.out.println("5");
			System.out.println("6");
			System.out.println("7");
			System.out.println("8");
			System.out.println("9");
			System.out.println("10");
			System.out.println("11");
			System.out.println("Optiunea dvs. este:");
			optiune=Integer.parseInt(buf.readLine());

			switch(optiune)
			{
			case 0:System.exit(0);
			break;
			case 1:
				System.out.println("Dati denumireae bancii:");
				denumire=buf.readLine();
				Banca banca=new Banca(denumire);
				banci.add(banca);
				break;
			case 2:
				System.out.println("nume:");
				String nume;
				nume=buf.readLine();
				System.out.println("adresa:");
				String adresa=buf.readLine();
				System.out.println("Banca:");
				String ba=buf.readLine();
				Client client=new Client(nume,adresa);
				for(Banca b: banci)
				{
					if(b.getDenumire_banca().equals(ba))
					{
						b.getClienti().add(client);
					}
				}
				break;
			case 3:
				System.out.println("numar:");
				String numar=buf.readLine();
				System.out.println("Suma:");
				float suma=Float.parseFloat(buf.readLine());
				System.out.println("Moneda");
				Moneda m=Moneda.valueOf(buf.readLine());
				System.out.println("Data deschiderii");
				LocalDate d1=LocalDate.parse(buf.readLine());
				System.out.println("Data ultimei operatiuni:");
				LocalDate d2=LocalDate.parse(buf.readLine());
				System.out.println("Client:");
				String clientul=buf.readLine();
				System.out.println("Banca");
				String b2=buf.readLine();

				ContBancar cont=new ContBancar(numar,suma,m,d1,d2);

				for(Banca b:banci)
				{
					if(b.getDenumire_banca().equals(b2))
					{
						for(Client c:b.getClienti())
						{
							if(c.getNume().equals(clientul))
							{
								c.getConturi().add(cont);
							}

						}
					}
				}
				break;
			case 4:
				banci.forEach(System.out::println);
				break;
			case 5:
				banci
				.stream()
				.flatMap(e->Stream.of(e.getDenumire_banca(),e.getClienti().size()))
				.forEach(System.out::println);
				break;
			case 6:
				System.out.println("Banca:");
				String b3=buf.readLine();

				banci
				.stream()
				.filter(a->(a.getDenumire_banca().equals(b3)))
				.map(Banca::getClienti)
				.forEach(System.out::println);
				break;
			case 7:
				System.out.println("Banca:");
				String b4=buf.readLine();
				System.out.println("Client:");
				String c2=buf.readLine();

				banci
				.stream()
				.filter(a->(a.getDenumire_banca().equals(b4)))
				.flatMap(b->b.getClienti()
						.stream()
						.filter(c->(c.getNume().equals(c2)))
						.map(c->c.getConturi()))
				.forEach(System.out::println);
				break;
			case 8:
				System.out.println("Nume:");
				String n=buf.readLine();
				banci
				.stream()
				.flatMap(b->b.getClienti()
						.stream()
						.filter(c->(c.getNume().equals(n)))
						.map(c->c.getConturi()))
				.forEach(System.out::println);
				break;
			case 9:

				System.out.println("Banca:");
				b4=buf.readLine();
				System.out.println("Client:");
				c2=buf.readLine();
				System.out.println("Cont:");
				String con=buf.readLine();
				System.out.println("Suma:");
				float s=Float.parseFloat(buf.readLine());

				for(Banca b:banci)
				{
					if(b.getDenumire_banca().equals(b4))
					{
						for(Client c:b.getClienti())
						{
							if(c.getNume().equals(c2))
							{
								for(ContBancar cb : c.getConturi())
								{
									if(cb.getNumarCont().equals(con))
									{
										cb.depunere(s);
									}
								}
							}
						}
					}
				}

				break;
			case 10:
				System.out.println("Banca:");
				b4=buf.readLine();
				System.out.println("Client:");
				c2=buf.readLine();
				System.out.println("Cont:");
				con=buf.readLine();
				System.out.println("Suma:");
				s=Float.parseFloat(buf.readLine());

				for(Banca b:banci)
				{
					if(b.getDenumire_banca().equals(b4))
					{
						for(Client c:b.getClienti())
						{
							if(c.getNume().equals(c2))
							{
								for(ContBancar cb : c.getConturi())
								{
									if(cb.getNumarCont().equals(con))
									{
										cb.extragere(s);
									}
								}
							}
						}
					}
				}
				break;
			case 11:
				System.out.println("Datele contului din care se extrag bani");
				System.out.println("Banca:");
				b4=buf.readLine();
				System.out.println("Client:");
				c2=buf.readLine();
				System.out.println("Cont:");
				con=buf.readLine();
				System.out.println("Suma:");
				s=Float.parseFloat(buf.readLine());
				System.out.println("Datele contului in care se trimit bani");
				System.out.println("Banca:");
				String b5=buf.readLine();
				System.out.println("Client:");
				String c3=buf.readLine();
				System.out.println("Cont:");
				String con2=buf.readLine();
				for(Banca b:banci)
				{
					if(b.getDenumire_banca().equals(b4))
					{
						for(Client c:b.getClienti())
						{
							if(c.getNume().equals(c2))
							{
								for(ContBancar cb : c.getConturi())
								{
									if(cb.getNumarCont().equals(con))
									{
										cb.extragere(s);
									}
								}
							}
						}
					}
				}
				
				for(Banca b:banci)
				{
					if(b.getDenumire_banca().equals(b5))
					{
						for(Client c:b.getClienti())
						{
							if(c.getNume().equals(c3))
							{
								for(ContBancar cb : c.getConturi())
								{
									if(cb.getNumarCont().equals(con2))
									{
										cb.depunere(s);
									}
								}
							}
						}
					}
				}
				
				break;
			default:System.out.println("Optiune gresita!!!!");
			}


		}while(optiune!=0);

	}

}


package LAB6bun;

import java.time.LocalDate;
import java.time.temporal.ChronoUnit;


public class ContBancar implements Operatiuni {

	private String numarCont;
	private float suma;
	private Moneda moneda;
	private LocalDate data_deschiderii;
	private LocalDate data_ultimei_operatiuni;

	public ContBancar(String numarCont, float suma, Moneda moneda, LocalDate data_deschiderii,
			LocalDate data_ultimei_operatiuni) {
		super();
		this.numarCont = numarCont;
		this.suma = suma;
		this.moneda = moneda;
		this.data_deschiderii = data_deschiderii;
		this.data_ultimei_operatiuni = data_ultimei_operatiuni;
	}

	public String getNumarCont() {
		return numarCont;
	}

	public void setNumarCont(String numarCont) {
		this.numarCont = numarCont;
	}

	public float getSuma() {
		return suma;
	}

	public void setSuma(float suma) {
		this.suma = suma;
	}

	public Moneda getMoneda() {
		return moneda;
	}

	public void setMoneda(Moneda moneda) {
		this.moneda = moneda;
	}

	public LocalDate getData_deschiderii() {
		return data_deschiderii;
	}

	public void setData_deschiderii(LocalDate data_deschiderii) {
		this.data_deschiderii = data_deschiderii;
	}

	public LocalDate getData_ultimei_operatiuni() {
		return data_ultimei_operatiuni;
	}

	public void setData_ultimei_operatiuni(LocalDate data_ultimei_operatiuni) {
		this.data_ultimei_operatiuni = data_ultimei_operatiuni;
	}

	@Override
	public String toString() {
		return "[numarCont=" + numarCont + ", suma=" + suma + ", moneda=" + moneda + ", data_deschiderii="
				+ data_deschiderii + ", data_ultimei_operatiuni=" + data_ultimei_operatiuni + "]";
	}

	@Override
	public float calculeaza_dobanda() {
		float dobanda=0;
		if(this.moneda==Moneda.RON)
		{
			if(this.suma<500)
			{
				dobanda=(float) (0.3*(ChronoUnit.DAYS.between(this.data_ultimei_operatiuni, LocalDate.now())));
			}
			else
			{dobanda=(float) (0.8*(ChronoUnit.DAYS.between(this.data_ultimei_operatiuni, LocalDate.now())));

			}

		}
		else
		{
			dobanda=(float) (0.1*(ChronoUnit.DAYS.between(this.data_ultimei_operatiuni, LocalDate.now())));
		}
		return dobanda;
	}

	@Override
	public float actualizare_suma() {
		
		this.suma+=calculeaza_dobanda();
		this.data_ultimei_operatiuni=LocalDate.now();
		return this.suma;
	}

	@Override
	public void depunere(float suma) {
		actualizare_suma();
		this.data_ultimei_operatiuni=LocalDate.now();
		this.suma+=suma;

	}

	@Override
	public void extragere(float suma) {
		actualizare_suma();
		this.data_ultimei_operatiuni=LocalDate.now();
		this.suma-=suma;

	}


}


package LAB6bun;

public enum Moneda {
	RON,
	EURO;

}


package LAB6bun;

public interface Operatiuni {
	
	public float calculeaza_dobanda();
	public float actualizare_suma();
	public void depunere(float suma);
	public void extragere(float suma);

}


package LAB6bun;

import java.util.HashSet;
import java.util.Set;

public class Client {
	private String nume;
	private String adresa;
	private Set<ContBancar> conturi=new HashSet<ContBancar>();


	public Client(String nume, String adresa) {
		super();
		this.nume = nume;
		this.adresa = adresa;
	}

	public String getNume() {
		return nume;
	}
	public void setNume(String nume) {
		this.nume = nume;
	}
	public String getAdresa() {
		return adresa;
	}
	public void setAdresa(String adresa) {
		this.adresa = adresa;
	}
	public Set<ContBancar> getConturi() {
		return conturi;
	}
	public void setConturi(Set<ContBancar> conturi) {
		this.conturi = conturi;
	}

	public Client(String nume, String adresa, Set<ContBancar> conturi) {
		super();
		this.nume = nume;
		this.adresa = adresa;
		this.conturi =conturi;
	}

	@Override
	public String toString() {
		return "[nume=" + nume + ", adresa=" + adresa + ", conturi=" + conturi + "]";
	}


}


package LAB6bun;

import java.util.ArrayList;
import java.util.List;

public class Banca {
	
	private String denumire_banca;
	private List<Client> clienti=new ArrayList<Client>();
	
	public Banca(String denumire_banca, List<Client> clienti) {
		super();
		this.denumire_banca = denumire_banca;
		this.clienti = clienti;
	}
	

	public Banca(String denumire_banca) {
		super();
		this.denumire_banca = denumire_banca;
	}


	public String getDenumire_banca() {
		return denumire_banca;
	}

	public void setDenumire_banca(String denumire_banca) {
		this.denumire_banca = denumire_banca;
	}

	public List<Client> getClienti() {
		return clienti;
	}

	public void setClienti(List<Client> clienti) {
		this.clienti = clienti;
	}

	@Override
	public String toString() {
		return "Banca [denumire_banca=" + denumire_banca + ", clienti=" + clienti + "]";
	}
	
	
}