完成

package zh.codegym.task.task17.task1711; import java.text.ParseException; import java.util.ArrayList; import java.util.Date; import java.util.List; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.Locale; /* CRUD 2 */ public class Solution { public static volatile List<Person> allPeople = new ArrayList<Person>(); static { allPeople.add(Person.createMale("Ivanov Ivan", new Date())); // id=0 allPeople.add(Person.createMale("Petrov Petr", new Date())); // id=1 } public static void main(String[] args) { //start here switch (args[0]) { //create person case "-c": for (int step = 1; step < args.length; step += 3) { Date date = null; try { date = new SimpleDateFormat("MM dd yyyy").parse(args[step + 2]); } catch (ParseException e) { e.getMessage(); } Person person; if (args[step + 1].startsWith("m")) person = Person.createMale(args[step], date); else person = Person.createFemale(args[step], date); synchronized (allPeople) { allPeople.add(person); } System.out.println(allPeople.indexOf(person)); } break; //update person case "-u": { synchronized (allPeople) { for (int step = 1; step < args.length; step += 4) { int index = Integer.parseInt(args[step]); Person person = allPeople.get(index); //update name person.setName(args[step + 1]); //update date Date date = null; try { date = new SimpleDateFormat("MM dd yyyy").parse(args[step + 3]); } catch (ParseException e) { e.getMessage(); } person.setBirthDate(date); //update sex if (args[step + 2].startsWith("m")) person.setSex(Sex.MALE); else person.setSex(Sex.FEMALE); } } //synchronized break; } //remove person case "-d": { synchronized (allPeople) { for (int i = 1; i < args.length; i++) { int index = Integer.parseInt(args[i]); Person person = allPeople.get(index); person.setName(null); person.setSex(null); person.setBirthDate(null); } } break; } //print person case "-i": { synchronized (allPeople) { for (int i = 1; i < args.length; i++) { int index = Integer.parseInt(args[i]); Person person = allPeople.get(index); StringBuffer s = new StringBuffer(); s.append(person.getName()); s.append(" "); s.append(person.getSex() == Sex.MALE ? "m" : "f"); s.append(" "); s.append(new SimpleDateFormat("MMM dd yyyy", Locale.ENGLISH).format(person.getBirthDate())); System.out.println(s); } } } break; } //For DEBUG /*for (Person person : allPeople) { StringBuffer s = new StringBuffer(); s.append(person.getName()); s.append(" "); s.append(person.getSex() == Sex.MALE ? "m" : "w"); s.append(" "); if (person.getBirthDay()!=null) s.append(dateFormatPrt.format(person.getBirthDay())); System.out.println(s); }*/ } }