如何在两个字符串或两个字符之间获得许多字符串

Question

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]

Answer 1

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.

Answer 2

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("∅"));