CODEWITHSUNDEEP
javastring
special
special

Reputation: 61

how to get many strings between two strings or two characters

I have this text tokenized as follows:

∅habbaz∅abdelkrim∅habbaz∅abdelkrim∅habbaz∅abdelkrim

I want to get every string between the character ∅. I have tried the following:

ArrayList<String> ta = new ArrayList();
String test=t2.getText();
String str = test;
Pattern pattern = Pattern.compile("∅(.*?)∅");
Matcher matcher = pattern.matcher(str);
while (matcher.find()) {

    ta.add(matcher.group(1));

}    
t3.setText(ta.toString());

It's supposed to give me:

[habbaz,abdelkrim, habbaz,abdelkrim, habbaz,abdelkrim]

But it's giving me only:

[habbaz, habbaz, habbaz]

Upvotes: 1

Views: 54

Answers (2)

popq
popq

Reputation: 56

If you want to go with the regex solution, try this:

Pattern pattern = Pattern.compile("∅([^∅]*)");

This pattern will match a ∅ followed by any number of non-∅, which should do the trick.

Upvotes: 1

mk.
mk.

Reputation: 11740

Use split:

String input = "∅habbaz∅abdelkrim∅habbaz∅abdelkrim∅habbaz∅abdelkrim";
String[] tokens = input.split("∅");

This will produce an array of those strings that are between your delimiter. Note that the first string in the array will be "", the empty string, because your input string starts with the delimiter ∅. To avoid this, take a substring of the input right before you split (if (input.startsWith("∅")) {input = input.substring(1);}), or process the resulting tokens to exclude any empty strings.

To turn the tokens into your ArrayList, use the following:

ArrayList ta = new ArrayList<Element>(Arrays.asList(tokens))

Or you could just write: 

List ta = Arrays.asList(input.split("∅"));

Upvotes: 0

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