import java.util.List;
import java.util.ArrayList;
import java.util.LinkedList;
...
public static void main(String[] args) { 
	List list;
	if (args.length == 0) {
		list = new ArrayList();
	} else {
		list = new LinkedList();
	}
	
	for(String s: args) {
		list.add(s);
	}
}
...