Question

I found a regular expression which matches tokens surrounded with {} but it only seems find the first found item.

How can the following code be changed so that all of the tokens will be found rather than just {World}, would i need to use loops?

// The search string
String str = "Hello {World} this {is} a {Tokens} test";

// The Regular expression (Finds {word} tokens)
Pattern pt = Pattern.compile("\\{([^}]*)\\}");

// Match the string with the pattern
Matcher m = pt.matcher(str);

// If results are found
if (m.find()) {
    System.out.println(m);
    System.out.println(m.groupCount()); // 1
    System.out.println(m.group(0)); // {World}
    System.out.println(m.group(1)); // World (Get without {})
}

Answer 1

Yes, in your code you just do one match, and get the groups captured in that single match.

If you want to get the other matches, you have to continue matching in a loop until find() returns false.

So basically all you need is to replace if with while and you’re there.