javerosanonimos
/ OrdenarListaConCollections.java
Created
February 21, 2017 23:33
Ejemplo para ordenar una lista con Collections (sort y reverse)
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| import java.util.ArrayList; | |
| import java.util.Collections; | |
| import java.util.List; | |
| /** | |
| @Autor: www.javerosanonimos.com | |
| Twitter: @javerosanonimos | |
| Facebook: www.facebook.com/JaverosAnonimos | |
| e-mail: javerosanonimos@gmail.com | |
| **/ |
javerosanonimos
/ OrdenarListaConComparator.java
Last active
February 21, 2017 23:01
Ejemplo para ordenar una lista utilizando comparator (ver Gist BeanParaOrdenar)
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| import java.util.ArrayList; | |
| import java.util.Collections; | |
| import java.util.Comparator; | |
| import java.util.List; | |
| /** | |
| @Autor: www.javerosanonimos.com | |
| Twitter: @javerosanonimos | |
| Facebook: www.facebook.com/JaverosAnonimos | |
| e-mail: javerosanonimos@gmail.com |
javerosanonimos
/ BeanParaOrdenar.java
Last active
February 21, 2017 23:02
Bean que usaremos para los ejemplos de ordenar listas
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| /** | |
| @Autor: www.javerosanonimos.com | |
| Twitter: @javerosanonimos | |
| Facebook: www.facebook.com/JaverosAnonimos | |
| e-mail: javerosanonimos@gmail.com | |
| **/ | |
| public class BeanParaOrdenar { | |
| private String codigo; |
javerosanonimos
/ EjemploConvertirListaAUnArreglo.java
Created
February 17, 2017 02:01
Código de ejemplo para convertir una lista a un arreglo
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| import java.util.Arrays; | |
| import java.util.List; | |
| /** | |
| @Autor: www.javerosanonimos.com | |
| Twitter: @javerosanonimos | |
| Facebook: www.facebook.com/JaverosAnonimos | |
| e-mail: javerosanonimos@gmail.com | |
| **/ |
javerosanonimos
/ EjemploConvertirListaAUnArray.java
Last active
February 17, 2017 02:00
Código de ejemplo para convertir un array a una lista
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| import java.util.ArrayList; | |
| import java.util.List; | |
| /** | |
| @Autor: www.javerosanonimos.com | |
| Twitter: @javerosanonimos | |
| Facebook: www.facebook.com/JaverosAnonimos | |
| e-mail: javerosanonimos@gmail.com | |
| **/ |
javerosanonimos
/ QuitarRepetidosConHashSet.java
Last active
September 19, 2020 07:21
Código para quitar elementos repetidos de una lista utilizando HashSet
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| import java.util.ArrayList; | |
| import java.util.HashSet; | |
| /** | |
| @Autor: www.javerosanonimos.com | |
| Twitter: @javerosanonimos | |
| Facebook: www.facebook.com/JaverosAnonimos | |
| e-mail: javerosanonimos@gmail.com | |
| **/ | |
| public class QuitarRepetidosConHashSet { |
javerosanonimos
/ CalcularEdadPorFechaNacimiento.java
Created
February 17, 2017 00:20
Código para calcular la edad a partir de una fecha de nacimiento
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| import java.text.SimpleDateFormat; | |
| import java.util.Calendar; | |
| import java.util.Date; | |
| /** | |
| @Autor: www.javerosanonimos.com | |
| Twitter: @javerosanonimos | |
| Facebook: www.facebook.com/JaverosAnonimos | |
| e-mail: javerosanonimos@gmail.com | |
| **/ | |
| class CalculaFecha { |
javerosanonimos
/ OrdenarYQuitarRepetidosDeListasConTreeSet.java
Last active
February 23, 2021 18:39
Código para ordenar listas y quitar datos repetidos utilizando TreeSet que nos ayuda a tener ordenadas nuestras listas gracias a que implementa Comparable y nos da como resultado una lista con un orden ascendente
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| import java.util.Arrays; | |
| import java.util.TreeSet; | |
| /** | |
| @Autor: www.javerosanonimos.com | |
| Twitter: @javerosanonimos | |
| Facebook: www.facebook.com/JaverosAnonimos | |
| e-mail: javerosanonimos@gmail.com | |
| **/ | |
| public class OrdenarYQuitarRepetidosDeListasConTreeSet { |
javerosanonimos
/ ContenedorMetodosParaReflection.java
Last active
February 17, 2017 01:13
Código para ejecutar métodos con reflection
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| /** | |
| @Autor: www.javerosanonimos.com | |
| Twitter: @javerosanonimos | |
| Facebook: www.facebook.com/JaverosAnonimos | |
| e-mail: javerosanonimos@gmail.com | |
| **/ | |
| public class ContenedorMetodosParaReflection { | |
| private Double descuento; |