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15 de abr. de 2015 · Collections by themselves do not have a predefined order, therefore you must convert them to a java.util.List. Then you can use one form of java.util.Collections.sort. Collection< T > collection = ...;
4 de oct. de 2024 · java.util.Collections.sort() method is present in java.util.Collections class. It is used to sort the elements present in the specified list of Collection in ascending order.
Returns a comparator that imposes the reverse of the natural ordering on a collection of objects that implement the Comparable interface. (The natural ordering is the ordering imposed by the objects' own compareTo method.)
Podrás hacerlo importando la clase Collections: import java.util.Collections; Y usando el método sort de la siguiente manera: Collections.sort(lista); Por lo que tu ejemplo completo quedaría:
15 de feb. de 2015 · Collections.sort can be called with a custom comparator. And that comparator can be implemented to allow sorting in different sort orders. Here's an example (for your Person model - with age as an Integer):
Collections.sort(l); If the List consists of String elements, it will be sorted into alphabetical order. If it consists of Date elements, it will be sorted into chronological order. How does this happen? String and Date both implement the Comparable interface.
Ordenar una lista utilizando Collections en Java es un proceso sencillo y consta de los siguientes pasos: Crear una instancia de la lista que se desea ordenar. Agregar los elementos a la lista. Importar la clase Collections. Utilizar el método sort() de la clase Collections para ordenar la lista.