1、Person.java。记录电话簿的人名。
/* * To change this template, choose Tools | Templates * and open the template in the editor. */ package PhoneText; import java.io.*; import java.util.*; /** * * @author pc */ public class Person implements Comparable,Serializable{ private String firstName; private String surName; public Person(String firstName,String surName) { this.firstName=firstName; this.surName=surName; } public String toString() { return firstName+""+surName; } public int compareTo(Object person) { int result=surName.compareTo(((Person)person).surName); return result==0?firstName.compareTo(((Person)person).firstName):result; } public boolean equals(Object person) { return compareTo(person)==0; } public int hashCode() { return 7 * firstName.hashCode()+13 * surName.hashCode(); } public static Person readPerson() { Scanner in = new Scanner(System.in); System.out.println("\nEnter first name:"); String firstName = in.nextLine().trim(); System.out.println("Enter surName:"); String surName=in.nextLine().trim(); return new Person(firstName,surName); } } 2、PhoneNumber.java。记录某个电话号码的信息，包括区号和电话号码。 /* * To change this template, choose Tools | Templates * and open the template in the editor. */ package PhoneText; import java.io.*; import java.util.*; /** * * @author pc */ class PhoneNumber implements Serializable{ private String areaCode; private String number; public PhoneNumber(String areaCode,String number) { this.areaCode=areaCode; this.number=number; } public String toString() { return areaCode + " " + number; } public static PhoneNumber readNumber() { Scanner in = new Scanner(System.in); System.out.println("\nEnter the area code:"); String area = in.nextLine(); // System.out.println("Enter the local code:"); // area = in.nextLine(); System.out.println("Enter the number："); String number =""+in.nextLine(); return new PhoneNumber(area,number); } } 3、BookEntry.java。记录电话簿的每一项内容，包括人名和电话号码。 /* * To change this template, choose Tools | Templates * and open the template in the editor. */ package PhoneText; /** * * @author pc */ public class BookEntry { private Person person; private PhoneNumber number; public BookEntry(Person person, PhoneNumber number) { this.person = person; this.number = number; } public Person getPerson(){return person;} public PhoneNumber getNumber(){return number;} public String toString(){ return person.toString()+"\n"+number.toString();} public static BookEntry readEntry() { return new BookEntry(Person.readPerson(),PhoneNumber.readNumber()); } } 4、PhoneBook.java。作为电话簿存储相应信息。 /* * To change this template, choose Tools | Templates * and open the template in the editor. */ package PhoneText; import java.util.*; /** * * @author pc */ class PhoneBook { private HashMap<Person,BookEntry>phonebook=new HashMap<Person,BookEntry>(); public void addEntry(BookEntry entry) { phonebook.put(entry.getPerson(), entry); } public BookEntry getEntry(Person key) { return (BookEntry)phonebook.get(key); } public PhoneNumber getNumber(Person key) { return getEntry(key).getNumber(); } } 5、TryPhoneBook.java。主面板。 /* * To change this template, choose Tools | Templates * and open the template in the editor. */ package PhoneText; import java.util.*; /** * * @author pc */ public class TryPhoneBook { public static void main(String[] args) { PhoneBook book = new PhoneBook(); Scanner in = new Scanner(System.in); Person someone; for(;;) { System.out.println("Enter 1 to enter a new phone book entry\n"+"Enter 2 to find the number for a name\nEnter 9 to quit"); int what = in.nextInt(); switch(what){ case 1: book.addEntry(BookEntry.readEntry()); break; case 2: someone = Person.readPerson(); BookEntry entry = book.getEntry(someone); if(entry==null) System.out.println("The number for"+someone+"was not found."); else System.out.println("The number for"+someone+"is"+book.getEntry(someone).getNumber()); break; case 9: System.out.println("Ending program."); return; default: System.out.println("Invalid delection,try again."); break; } } } } 如果出现中文乱码，将项目的编码设置为GB2312。！！！