Im new in java
Lets say I have
class OnlyNotes {
String notes;
}
and
List<OnlyNotes>;
how to convert it to:
List<String>
That contains list of notes
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4What have you tried so far?Sean Powell– Sean Powell2021-07-12 07:39:11 +00:00Commented Jul 12, 2021 at 7:39
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2 Answers
You can write like this.
List<OnlyNotes> onlyNotes = new ArrayList<>();
List<String> newStrings = onlyNotes.stream.map(e -> e.notes).collect(Collectors.toList());
Comments
Assumning your class looks like
class OnlyNotes {
String notes;
private OnlyNotes(String pNotes) {
super();
notes = pNotes;
}
public String getNotes() {
return notes;
}
}
you could do that by using for-loop or by using stream
List<OnlyNotes> onlyNotesList =
Arrays.asList(new OnlyNotes("first"), new OnlyNotes("second"), new OnlyNotes("third"));
List<String> onlyNotesAsStringList = new ArrayList<>();
for (OnlyNotes onlyNotes : onlyNotesList) {
onlyNotesAsStringList.add(onlyNotes.getNotes());
}
List<String> onlyNotesAsStringByStreamList = onlyNotesList.stream().map(OnlyNotes::getNotes).collect(Collectors.toList());
