jmu-Java-m06 根据姓名以及电话号码查找联系人
分数 20
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作者 郑如滨
单位 集美大学
该程序包含：
Person类:
属性：int id, String name, String phoneNumber，String address。
方法：
无参构造方法，有参构造方法（id, name, phoneNumber，addres）,
各个参数的getter/setter方法，
toString()方法。
Utils类:
用于生成通讯录(具体代码下面已给出)
Main类的main方法:
使用Utils类创建一个通讯录personList，使用Map将personList中的person对象按name分类存储。即，key为person的name值，value为对应的person对象的List列表（说明：就是将相同name值的person对象放在一起List列表中）。
接下来就可以在该Map中根据姓名与电话号码查询联系人。查询方法如下：
- 输入n
- 输入n行的name以及phoneNumber值，以空格分开。然后根据name查找map，如果找到且在列表中的存在某个person对象的电话号码也相同，则输该person对象。如果找不到（即找不到name与电话号码均匹配的Person对象）则输出提示信息。
- 最后一行输出map的数量，即map.size()(该行输出在输出样例中未显示)
Utils类实现如下：
class Utils{private static final Random rd = new Random(3);private static final int number = 200000;private static List<String> getPersonName(){StringBuilder sb = new StringBuilder();List<String> names = new ArrayList<String>();for(int i=0;i<Utils.number;i++) {sb.delete(0, sb.length());for(int j=0;j<4;j++) {if(j==0) {sb.append((char)('A'+rd.nextInt(26)));}else {sb.append((char)('a'+rd.nextInt(26)));}}names.add(sb.toString());}return names;}private static List<String> getPhoneNumber(){String[] telFirst="134,135,136,137,138,139,150,151,152,157,158,159,130,131,132,155,156,133,153".split(",");StringBuilder sb = new StringBuilder();List<String> phoneNumbers = new ArrayList<String>();for(int i=0;i<Utils.number;i++) {sb.delete(0, sb.length());for(int j=0;j<9;j++) {if(j==0) {sb.append(telFirst[rd.nextInt(telFirst.length)]);}else {sb.append(rd.nextInt(10));}}phoneNumbers.add(sb.toString());}return phoneNumbers;}private static List<String> getPersonAddress(){List<String> addresses = new ArrayList<String>();String[] roads = {"HuanDao Road","WenZeng Road","ZhongShang Road","KaiHe Road","NanHua Road","SongBai Road","BinShui Road","ShiGu Road","JiYuan Road","YinJiang Road"};StringBuilder sb = new StringBuilder();for(int i=0;i<Utils.number;i++) {sb.delete(0, sb.length());for(int j=0;j<2;j++) {if(j==1) {sb.append(roads[rd.nextInt(roads.length)]);}else {sb.append("Room "+rd.nextInt(100)+"-"+rd.nextInt(1000)+"-"+rd.nextInt(10000)+", ");}}addresses.add(sb.toString());}return addresses;}public static List<Person> getPersonList(){List<String> names = Utils.getPersonName();List<String> phones = Utils.getPhoneNumber();List<String> addresses = Utils.getPersonAddress();List<Person> persons = new ArrayList<Person>();for(int i=0;i<Utils.number;i++) {Person person = new Person();person.setId(i);person.setName(names.get(i));person.setPhoneNumber(phones.get(i));person.setAddress(addresses.get(i));persons.add(person);}return persons;}
}
输入格式:
一个正整数n
接下去的n行：
输入name以及phoneNumber
输出格式:
如果找到对象则输出该对象
未找到对象则输出"Not found!"。
输入样例:
5
Vern 15678785276
Paul 13369862612
Todd 15094198414
Mike 15079239680
Tony 13739215033输出样例:
Not found!
Person [id=162538, name=Paul, phoneNumber=13369862612, address=Room 8-446-6866, ShiGu Road]
Person [id=139814, name=Todd, phoneNumber=15094198414, address=Room 8-856-5546, JiYuan Road]
Not found!
Person [id=184950, name=Tony, phoneNumber=13739215033, address=Room 71-896-9345, SongBai Road]
161999代码长度限制
50 KB
时间限制
2500 ms
内存限制
256 MB
栈限制
8192 KB
import java.util.*;public class Main {public static void main(String[] args) {List<Person> personList = Utils.getPersonList();Map<String, List<Person>> personMap = new HashMap<>();// 按姓名分类存储for (Person person : personList) {personMap.computeIfAbsent(person.getName(), k -> new ArrayList<>()).add(person);}Scanner scanner = new Scanner(System.in);int n = scanner.nextInt();scanner.nextLine(); // 读取换行符for (int i = 0; i < n; i++) {String line = scanner.nextLine();String[] parts = line.split(" ");String name = parts[0];String phoneNumber = parts[1];if (personMap.containsKey(name)) {List<Person> persons = personMap.get(name);boolean found = false;for (Person person : persons) {if (person.getPhoneNumber().equals(phoneNumber)) {System.out.println(person);found = true;break;}}if (!found) {System.out.println("Not found!");}} else {System.out.println("Not found!");}}System.out.println(personMap.size()); // 输出map的数量scanner.close();}
}class Person {private int id;private String name;private String phoneNumber;private String address;public Person() {}public Person(int id, String name, String phoneNumber, String address) {this.id = id;this.name = name;this.phoneNumber = phoneNumber;this.address = address;}public int getId() {return id;}public void setId(int id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getPhoneNumber() {return phoneNumber;}public void setPhoneNumber(String phoneNumber) {this.phoneNumber = phoneNumber;}public String getAddress() {return address;}public void setAddress(String address) {this.address = address;}@Overridepublic String toString() {return "Person [id=" + id + ", name=" + name + ", phoneNumber=" + phoneNumber + ", address=" + address + "]";}
}class Utils {private static final Random rd = new Random(3);private static final int number = 200000;private static List<String> getPersonName() {StringBuilder sb = new StringBuilder();List<String> names = new ArrayList<String>();for (int i = 0; i < Utils.number; i++) {sb.delete(0, sb.length());for (int j = 0; j < 4; j++) {if (j == 0) {sb.append((char) ('A' + rd.nextInt(26)));} else {sb.append((char) ('a' + rd.nextInt(26)));}}names.add(sb.toString());}return names;}private static List<String> getPhoneNumber() {String[] telFirst = "134,135,136,137,138,139,150,151,152,157,158,159,130,131,132,155,156,133,153".split(",");StringBuilder sb = new StringBuilder();List<String> phoneNumbers = new ArrayList<String>();for (int i = 0; i < Utils.number; i++) {sb.delete(0, sb.length());for (int j = 0; j < 9; j++) {if (j == 0) {sb.append(telFirst[rd.nextInt(telFirst.length)]);} else {sb.append(rd.nextInt(10));}}phoneNumbers.add(sb.toString());}return phoneNumbers;}private static List<String> getPersonAddress() {List<String> addresses = new ArrayList<String>();String[] roads = {"HuanDao Road", "WenZeng Road", "ZhongShang Road", "KaiHe Road", "NanHua Road", "SongBai Road", "BinShui Road", "ShiGu Road", "JiYuan Road", "YinJiang Road"};StringBuilder sb = new StringBuilder();for (int i = 0; i < Utils.number; i++) {sb.delete(0, sb.length());for (int j = 0; j < 2; j++) {if (j == 1) {sb.append(roads[rd.nextInt(roads.length)]);} else {sb.append("Room " + rd.nextInt(100) + "-" + rd.nextInt(1000) + "-" + rd.nextInt(10000) + ", ");}}addresses.add(sb.toString());}return addresses;}public static List<Person> getPersonList() {List<String> names = Utils.getPersonName();List<String> phones = Utils.getPhoneNumber();List<String> addresses = Utils.getPersonAddress();List<Person> persons = new ArrayList<Person>();for (int i = 0; i < Utils.number; i++) {Person person = new Person();person.setId(i);person.setName(names.get(i));person.setPhoneNumber(phones.get(i));person.setAddress(addresses.get(i));persons.add(person);}return persons;}
}