4 substrings from String

I have the following string:

"Sample text, another sample","勾","","勾"

I want to get 4 substrings as follows:

• Sample text, another sample
• 勾
• //just empty string
• 勾

Can someone post solution on how to achieve that? If possible, could you show me two ways to do that (standard way and by using regular expressions). Thanks a lot

String str = "\"Sample text, another sample\",\"勾\",\"\",\"勾\"";
Pattern pattern = Pattern.compile("\"([^\"]*)\"");
Matcher matcher = pattern.matcher(str);
while(matcher.find())
{
    System.out.println(matcher.group(1));
}