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Array de un tipo genérico. | Conecto ergo sum.
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Array de un tipo genérico.


Warning: Use of undefined constant user_level - assumed 'user_level' (this will throw an Error in a future version of PHP) in /homepages/11/d274290037/htdocs/serabe/wp-content/plugins/ultimate-google-analytics/ultimate_ga.php on line 524

En Java 5 (desconozco lo que pasa en Java 6, aún no está en Mac, por desgracia) no se pueden instanciar arrays de un tipo genérico, para ello hay que recurrir a un pequeño truco de casting. Suponiendo que la clase es, por ejemplo, Pila<T> la línea de código para declarar un array llamado stack de capacidad n es:

T[] stack = (T[]) new Object[n];

Saldrá un warning “Type safety: Unchecked cast from Object[] to T[]”, pero no hay nada de que preocuparse.

Fuente.

2 thoughts on “Array de un tipo genérico.


  1. Warning: Use of undefined constant user_level - assumed 'user_level' (this will throw an Error in a future version of PHP) in /homepages/11/d274290037/htdocs/serabe/wp-content/plugins/ultimate-google-analytics/ultimate_ga.php on line 524
    vieiras

    Warning: Use of undefined constant user_level - assumed 'user_level' (this will throw an Error in a future version of PHP) in /homepages/11/d274290037/htdocs/serabe/wp-content/plugins/ultimate-google-analytics/ultimate_ga.php on line 524

    Buenas! Pues tu comentario me ha servido para confirmar la hipotesis que tenia. Era justamente lo que buscaba. Ahora bien, resuelto ese problema, ¿En Java 6 habran solucionado ese problema y se podran crear ya arrays genericos?

    de momento, T[] stack = new T [n]; sigue sin gustarle al compilador (y eso que tengo java v. 1.6.0_04.). Ya veremos si lo arreglan o que.

    Saludos a la comunidad y a ti por el comentario.


  2. Warning: Use of undefined constant user_level - assumed 'user_level' (this will throw an Error in a future version of PHP) in /homepages/11/d274290037/htdocs/serabe/wp-content/plugins/ultimate-google-analytics/ultimate_ga.php on line 524
    Juan José Melero

    Warning: Use of undefined constant user_level - assumed 'user_level' (this will throw an Error in a future version of PHP) in /homepages/11/d274290037/htdocs/serabe/wp-content/plugins/ultimate-google-analytics/ultimate_ga.php on line 524

    Gracias por la aportación. Nos ha sacado de un apuro en un ejercicio de clase 🙂

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