I have List and I want to convert to Map<Integer,String> using streams in java8.
Say for example :
List<Integer> li = Arrays.asList(1,2,3);
Then want to convert to Map<Integer,String> like
Map({1,"1"},{2,"2"},{3,"3"})
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2 Answers
You can try below stuff and should work fine(Tested).
List<Integer> li = Arrays.asList(1,2,3);
Map<Integer, String> result =
li.stream().collect(Collectors.toMap(i -> i, i -> i.toString()));
Comments
If you want map, there should be Key=Value pair, I assume you [{1,"1"}, {2,"2"}, {3,"3"}] want like this,
List<String> collect = li.stream()
.map(a -> "{"+a + ",\"" + a +"\"}")
.collect(Collectors.toList());
