Clase cliente tp5

import java.util.Random;
import javax.lang.model.element.Element;

public class Cliente extends Thread{

    private String nombre;
    private static int indice = 0;
    private Mostrador<Element> cola;
    private Random random = new Random();
    private int lim_superior_compra = 400;
    private int lim_inferior_compra = 200;
    private int lim_superior_llegada = 1500;
    private int lim_inferior_llegada = 800;

    public Cliente(Mostrador<Element> mostrador) {
        indice++;
        this.nombre = "Cliente "+ indice;
        this.cola = mostrador;
    }

    public void run() {

        try {
            Thread.sleep(random.nextInt(this.lim_inferior_llegada, this.lim_superior_llegada));
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
        }

        if(cola.noHayBizc()&&cola.noHayFact()) {
            System.out.println("Mostrador vacío, cliente "+indice+" esperando");
            try {
                wait();
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        int bizcocho = cola.comprarBizcocho();
        int factura = cola.comprarFactura();

        System.out.println(this.nombre + " compró: bizcocho " + bizcocho + " y facura " + factura);
        try {
            Thread.sleep(random.nextInt(this.lim_inferior_compra, this.lim_superior_compra));
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
        }
    }
}