import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.regex.*;
 
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		String s = "\"test\":[\"value1\", \"value2\"]";
		Pattern pattern = Pattern.compile("\"(test)\"\\s*:\\s*(?:\"([^\"]*)|\\[([^\\]]*))");
		Matcher matcher = pattern.matcher(s);
		while (matcher.find()){
			System.out.println("Key: " + matcher.group(1)); 
			if (matcher.group(2) != null) {
				System.out.println("Value: " + matcher.group(2)); 
			} else {
				System.out.println("Value: " + matcher.group(3)); 
			}
		} 
	}
}

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