4 replies to this topic

[Riku]

Does anyone have the source for a GetBetweenAll function for Java?

[Kway]

Java sucks when it comes to manipulating strings. Your best bet would be the java.util.regex API.

 

As a word of caution, I would avoid testing your regexes in Python or Javascript first because each language does regex a bit differently so even if it works in one, it might not work in another.

[Waser Lave]

 

public static String[] arrGetBetweenM;

public static void GetBetweenM(String strString, String strStart, String strEnd, int intMatches) {
    arrGetBetweenM = new String[intMatches];
    int lngPosition = 1;
    for (int i = 0; i < intMatches; i++) {
        int intBegin = strString.indexOf(strStart, lngPosition) + strStart.length();
        lngPosition = intBegin + 1;
        int intEnd = strString.indexOf(strEnd, lngPosition);
        arrGetBetweenM[i] = strString.substring(intBegin, intEnd);
    }
}Use:

Class.GetBetweenM(Dpage, "<", ">", i);
System.out.println(Class.arrGetBetweenM[i]);

Where input i (amount of matches) is output 0 to i - 1.

 

[Riku]

I searched this forum high and low for that! I remember seeing it years ago but couldn't find it again. Thanks, @Waser Lave.

 

Thanks @Kway. I've been programming for years so I know all about regex . I just wanted to see if I could avoid reinventing the wheel. Thanks though!

Edited by Riku, 28 September 2014 - 09:45 AM.

[Charmender]

If you wanted to use Regex and pattern matching, you could do something like the following:

 

    public static List<String> GetBetween(String start, String end, String source) {
        List<String> results = new ArrayList();
        Pattern p = Pattern.compile(start + "(.*?)" + end);
        Matcher m = p.matcher(source);
        while (m.find()) {
            results.add(m.group(1));
        }
        return results;
    }

 

If you still wanted limits you could do something such as :

    public static List<String> GetBetween(String start, String end, String source) {
        return GetBetween(start, end, source, -1);
    }

    public static List<String> GetBetween(String start, String end, String source, int limit) {
        int count = 0;
        List<String> results = new ArrayList();
        Pattern p = Pattern.compile(start + "(.*?)" + end);
        Matcher m = p.matcher(source);
        while (m.find() && (limit == -1 || count < limit)) {
            results.add(m.group(1));
            count++;
        }
        return results;
    }