How to split string into list and trim in one line Java

Question

Please look at my code

 String Str = "E_1000, E_1005,E_1010 , E_1015,E_1020,E_1025";
                List<String> splitStr = Arrays.asList(Str.split(","));

My list (splitStr) has strings with white spaces.

Is there a way to split the string and trim all the elements in one line of code?

Answer 1

Yes, simply do:

String str = "E_1000, E_1005,E_1010 , E_1015,E_1020,E_1025";
List<String> splitStr = Arrays.stream(str.split(","))
    .map(String::trim)
    .collect(Collectors.toList());

Explanation:
First, we split on ,:

                                      str.split(",")

Then, we turn it into a Stream of (untrimmed) Strings:

                        Arrays.stream(str.split(","))

Next, we trim all the Strings in the Stream:

                        Arrays.stream(str.split(","))
    .map(String::trim)

Finally, we collect all the trimmed Strings into a List:

                        Arrays.stream(str.split(","))
    .map(String::trim)
    .collect(Collectors.toList());