# Ordenar una List Java 8

Ordenar List con Java 8

{% embed url="<http://avbravo.blogspot.com/2014/12/ordenar-list-y-agrupar-con-java-8.html>" %}

Agrupar

```java
 Map<String, List<Consolidado>> listAgrupado = listConsolidado
                    .stream()
                    .collect(Collectors.groupingBy(p -> p.getIdnivel6()));
```

Ordenar

```java
  Collections.sort(listConsolidadoFinal,
                    (Consolidado a, Consolidado b) -> a.getIdnivel5().compareTo(b.getIdnivel6()));
```

Ordenar un List<> en Orden inverso

```java
List<Solicitud> solicitudList = solicitudRepository.findAll();

solicitudList.sort(Comparator.comparing(Solicitud::getIdsolicitud)
                      .reversed()
                      .thenComparing(Comparator.comparing(Solicitud::getIdsolicitud)
                      .reversed())
```

<http://avbravo.blogspot.com/2014/12/ordenar-list-y-agrupar-con-java-8.html>

## Jugando con Lambda JDK8

{% embed url="<http://avbravo.blogspot.com/2014/08/jugando-con-lambda-jdk8.html>" %}

Otras comparaciones

{% embed url="<https://dzone.com/articles/java-8-comparator-how-to-sort-a-list>" %}

Ejemplo del enlace anterior

```java
List<Movie> movies = Arrays.asList(
        new Movie("Lord of the rings", 8.8),
        new Movie("Back to the future", 8.5),
        new Movie("Carlito's way", 7.9),
        new Movie("Pulp fiction", 8.9));
movies.sort(Comparator.comparingDouble(Movie::getRating)
                      .reversed());
movies.forEach(System.out::println);
```


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