You used to have
str.split(",");
and split()
is a void
method. It doesn’t alter str
.
you could fix it by replacing str.split(",")
with: str = str.split(",")
, or you could put it all on one line like:
while ((str = br1.readLine()) != null)
userstr.add(str.split(",")[0]);
2
solved How can I separate a single String into two parts? [duplicate]