I'm interested in sorting a list from a stream. This is the code I'm using:
list.stream()
.sorted((o1, o2)->o1.getItem().getValue().compareTo(o2.getItem().getValue()))
.collect(Collectors.toList());
Am I missing something? The list is not sorting.
It should sort the lists according to the item with the lowest value.
for (int i = 0; i < list.size(); i++)
{
System.out.println("list " + (i+1));
print(list, i);
}
And the print method:
public static void print(List<List> list, int i)
{
System.out.println(list.get(i).getItem().getValue());
}
This is not like Collections.sort()
where the parameter reference gets sorted. In this case you just get a sorted stream that you need to collect and assign to another variable eventually:
List result = list.stream().sorted((o1, o2)->o1.getItem().getValue().
compareTo(o2.getItem().getValue())).
collect(Collectors.toList());
You've just missed to assign the result