/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.regex.*;
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
 
		String s = "value1,\"1\",\"2\",3,\"4,5\",value2";
		Pattern pattern = Pattern.compile("\"([^\"]+)\"|(?<=,|^)([^,]*)");
		Matcher matcher = pattern.matcher(s);
		List<String> res = new ArrayList<String>();
		while (matcher.find()){
			if (matcher.group(1) != null) {
				res.add(matcher.group(1));
			} else {
				res.add(matcher.group(2));
			}
		} 
		System.out.println(res); 
	}
}

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