how to find words between place holders

[vittal mareddy]

I have a value in string variable, i want to get wards between place holder, is there any api i can use from JDK1.5,

String str ="select user_name,'$user_name$','$test_app1$' from dm_user where r_is_group = FALSE and user_state = 0 and user_name not like 'dm%' order by user_name";

I need to get user_name, test_app1

Thanks
vittal

[Rishi Shah]

You can use regular expressions:

final Pattern pattern = Pattern.compile("\\$(.+?)\\$");
final Matcher matcher = pattern.matcher(str);
final List<String> list = new LinkedList<String>();

while (matcher.find()) {
  list.add(matcher.group(1));
}

You can learn about regular expressions here: http://codular.com/regex