public class Main {
 
    String marca;
    String placa;
    String modelo;
    double kilometraje;
 
    // Declaramos la variable de tipo entero dentro de la clase
    int cantidad;
 
    public static void main(String[] args) {
        Main miAuto = new Main();
 
        // La asignación de valores debe hacerse dentro de un método
        miAuto.cantidad = 10;
 
        miAuto.registrarAutomovil();
        miAuto.consultarAutomovil();
        System.out.println("Cantidad: " + miAuto.cantidad);
    }
 
    public void registrarAutomovil() {
        System.out.println("Automóvil registrado");
    }
 
    public void consultarAutomovil() {
        System.out.println("Marca: " + marca);
        System.out.println("Placa: " + placa);
        System.out.println("Modelo: " + modelo);
        System.out.println("Kilometraje: " + kilometraje);
    }
}

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public class Main {

    String marca;
    String placa;
    String modelo;
    double kilometraje;

    public void registrarAutomovil() {
        System.out.println("Automóvil registrado");
    }

    public void consultarAutomovil() {
        System.out.println("Marca: " + marca);
        System.out.println("Placa: " + placa);
        System.out.println("Modelo: " + modelo);
        System.out.println("Kilometraje: " + kilometraje);
    }

    public void actualizarKilometraje(double nuevoKilometraje) {
        kilometraje = nuevoKilometraje;
    }

    public static void main(String[] args) {
        Main auto = new Main();
        auto.marca = "Toyota";
        auto.placa = "ABC-123";
        auto.modelo = "Corolla";
        auto.kilometraje = 15000;

        auto.registrarAutomovil();
        auto.consultarAutomovil();
    }
}