import java.util.regex.Matcher;
import java.util.regex.Pattern;

final String regex = "\\$\\{(.*?)\\}";
final String string = "hello, ${name}. Your level is ${level}\n";

final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE);
final Matcher matcher = pattern.matcher(string);

while (matcher.find()) {
System.out.println("Full match: " + matcher.group(0));
for (int i = 1; i <= matcher.groupCount(); i++) {
System.out.println("Group " + i + ": " + matcher.group(i));
}
}