Creame un programa que sea de renta de autos

public class Alquiler{
  private int dias, km; 
  private double costo;
  private String nombre;
  
  public Alquiler(int dias, int km, String nombre){
    this.dias = dias;
    this.km = km;
    this.nombre = nombre;
  }
  
  public void calcularCosto(){
    costo = dias * 5000 + km * 1500;
  }
  
  public double getCosto(){
    return costo;
  }
}

public class Main {
  public static void main(String[] args) {
    Alquiler a1 = new Alquiler(3, 200, "Cristian");
    a1.calcularCosto();
    System.out.println(a1.getCosto());
  }
}