Could someone suggest how could I transform list like ["bla", "blabla", "blablabla"] to map like {"bla" : 3, "blabla" : 6, "blablabla" : 9} with words stands for keys and values stands for words lengths?
I do something like:
Map<String, Integer> map = list.stream().collect(Collectors.groupingBy(Function.identity(), String::length));
but have no luck.
Thank you!
You were almost correct with groupingBy, but the second parameter of that is a Collector, not a Function. Thus I used toMap.
Map<String, Integer> map = Stream.of("bla", "blabla", "blablabla").distinct()
.collect(Collectors.toMap(Function.identity(), String::length));
You don't have to do something so complicated. Here is an example code:
...
...
List<String> ll= // the list of words that you have.
Map<String,Integer> map = new HashMap<>();// or any other kind of map you want to create
for(String s:ll){
map.put(s,s.length());
}
Now you have a map that satisfies your requirement.
Collectors.toMap. And make sure your stream isdistinct(), otherwise you'll get an exception if you have duplicates inlist.