September 2024
Intermediate to advanced
552 pages
16h 34m
Spanish
Content preview from Aprender Java, 6ª Edición
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Capítulo 7. Colecciones y genéricos
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A medida que empecemos a utilizar nuestro creciente conocimiento de los objetos para manejar problemas cada vez más interesantes, surgirá una pregunta recurrente. ¿Cómo almacenamos los datos que manipulamos al resolver esos problemas? Sin duda utilizaremos variables de todos los tipos, pero también necesitaremos opciones de almacenamiento más grandes y sofisticadas. Las matrices de las que hablamos en "Matrices" son un comienzo, pero las matrices tienen algunas limitaciones. En este capítulo veremos cómo conseguir un acceso eficaz y flexible a grandes cantidades de datos utilizando la idea de Java de las colecciones. También veremos cómo tratar los distintos tipos de datos que queremos almacenar en estos grandes contenedores como hacemos con los valores individuales en variables. Ahí es donde entran en juego los genéricos. Llegaremos a ellos en "Limitaciones de tipo".
Colecciones
Las colecciones son estructuras de datos fundamentales en todo tipo de programación. Siempre que necesitemos referirnos a un grupo de objetos, tendremos algún tipo de colección. En el nivel básico del lenguaje, Java admite colecciones en forma de matrices. Pero las matrices son estáticas y, como tienen una longitud fija, resultan incómodas para grupos de cosas que crecen y decrecen a lo largo de la vida de una aplicación. Las matrices también son malas ...
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