extract substring from within 2 tokens

[pieceovcake]

anyone know the equivalent of

String description = "ID:89790797:ID";
String foundid = org.apache.commons.lang.StringUtils.substringBetween(description, "ID:", ":ID");

in the java.util.regex library?

I need to extract the string between the ID tags

Thanks
                

[zixzigma]

split the string (eg.description), and use ":" as delimiter,


String [] result = description.split(":"); //result is an array of 3
elements "ID" "89790797" "ID"
String id = result[1];

[zixzigma]

http://download.oracle.com/javase/6/docs/api/java/lang/String.html#split%28java.lang.String%29

[Thomas Broyer]

First, java.util.regex is not emulated in GWT, so there's no reason to replace Apache Commons with java Regex.

There's however a com.google.gwt.regexp module. You could use something like:

RegExp r = RegExp.compile("ID:(.*?):ID", "g");

MatchResult m = r.exec(description);

if (m != null) {

   foundid = m.getGroup(1);

} else {

   // not found

}

(assuming 'description' can contain many things around the ID:...:ID, otherwise the String.split() option, or even String.substring, possibly combined with String.startsWith and String.endsWith, is the way to go as it's less error-prone)