public class Main {
 
    private String marca;
    private String placa;
    private String modelo;
    private double kilometraje;
 
    public static void main(String[] args) {
        Main miAuto = new Main();
        System.out.println("Clase Automovil/Main lista.");
    }
}

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public class Main {

    String marca;
    String placa;
    String modelo;
    double kilometraje;
    int cantidad = 10; // Declarada e inicializada correctamente dentro de la clase

    // Método main obligatorio para que Ideone pueda ejecutar el programa
    public static void main(String[] args) {
        Main miAuto = new Main();
        
        miAuto.registrarAutomovil();
        miAuto.consultarAutomovil();
    }

    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);
        System.out.println("Cantidad: " + cantidad);
    }

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