split up data with java split() make empty data of first array

Question

DB has like this data for hashtag in string type

#a#b#c#d#e

with this data, I want split each tag

so I code this

 String tagToArray[] = output.getText("TAG", i).split("#");

but the result is

tagToArray[, a, b, c, d, e]

I want to remove first empty data what is the right way to splay data of hashtag?

You could also filter out the empty result(s) from split() if that is what is wanted. — Magnilex
– Magnilex, Commented May 7, 2020 at 6:16

Eklavya · Accepted Answer · 2020-05-07 06:51:26Z

1

This extra empty string produce for first #.

So, you can replace the first character if it is # then split.

 String tagToArray[] = output.getText("TAG", i).replaceFirst("^#", "").split("#");

edited May 7, 2020 at 6:51

answered May 7, 2020 at 6:13

Eklavya

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Joakim Danielson · Accepted Answer · 2020-05-07 06:13:46Z

1

Remove the first # before splitting

 String[] array = str.replaceFirst("#", "").split("#");

answered May 7, 2020 at 6:13

Joakim Danielson

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2 Comments

NKR Over a year ago

Will it work if the input is a#b#c#d#e? If the given text always begins with # then this work.

Joakim Danielson Over a year ago

@NKR As I interpret the question the syntax is #value for each column

MartenCatcher · Accepted Answer · 2020-05-07 07:21:18Z

0

The issue can be solved with the regex (?<=\#)(.)

Code:

output.getText("TAG", i).split("(?<=\#)(.)");

edited May 7, 2020 at 7:21

MartenCatcher

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answered May 7, 2020 at 6:35

RICK XU

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