CODEWITHSUNDEEP
javaparsingcsv
lakhaman
lakhaman

Reputation: 485

How can I separate tokens when there are some null tokens

I have a line in the .csv file as abc,bcc,

I have to separate it into three tokens abc, bcc and null.

First, I tried StringTokenizer but it did not return a null token. Then, I tried String.split(",") but it also did not return null at the end; it returned a string which has null in between but not at the end.

so please help me thanks in advance.

Upvotes: 0

Views: 653

Answers (2)

user85421
user85421

Reputation: 29680

Use the two argument split method with a negative second argument:

String str = "abc,bcc,";
String[] tokens = str.split(",", -1);

The relevant documentation part:

The limit parameter controls the number of times the pattern is applied and therefore affects the length of the resulting array.

  • If the limit is positive then the pattern will be applied at most limit - 1 times, the array's length will be no greater than limit, and the array's last entry will contain all input beyond the last matched delimiter.
  • If the limit is zero then the pattern will be applied as many times as possible, the array can have any length, and trailing empty strings will be discarded.
  • If the limit is negative then the pattern will be applied as many times as possible and the array can have any length.

Upvotes: 3

Joachim Sauer
Joachim Sauer

Reputation: 308031

Try the String.split() variant that takes a limit and pass a negative number to it.

Upvotes: 2

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