import java.util.HashMap;

import java.util.Map;

import java.util.ArrayList;

import java.util.List;

public class CommandLineIndexer {

public static class Option {

String name;

List<String> values;

public Option(String name) {

this.name = name;

this.values = new ArrayList<>();

}

}

public static Map<String, List<String>> indexOptions(String[] args) {

Map<String, List<String>> options = new HashMap<>();

if (args == null || args.length == 0) {

return options; // Return empty map if no arguments

}

for (int i = 0; i < args.length; i++) {

String arg = args[i];

if (arg.startsWith("--")) {

String optionName = arg.substring(2); // Remove "--"

if (!options.containsKey(optionName)) {

options.put(optionName, new ArrayList<>());

}

if (i + 1 < args.length) {

String value = args[i + 1];

options.get(optionName).add(value);

i++; // Skip the value

}

}

}

return options;

}

public static void main(String[] args) {

Map<String, List<String>> indexedOptions = indexOptions(args);

for (Map.Entry<String, List<String>> entry : indexedOptions.entrySet()) {

String optionName = entry.getKey();

List<String> values = entry.getValue();

System.out.println("Option: " + optionName + ", Values: " + values);

}

}

}