Java阵列列表验证

我需要在用户向

ArrayList

添加人员时添加验证。输入姓名、地址、法定国家缩写。等等，我该怎么做

我想象一个

IF语句

，但我不知道如何将它合并到

newFriend.setAddress（sc.nextLine（））中行的类型

import java.util.*;
import java.io.*;
import javax.swing.*;


public class testAddressBook {

    //Personal Friend Array
    public static PersonalFriend newFriend = new PersonalFriend(null, null, null, null, null, null, null, null, null, null,0,null);
    public static ArrayList<PersonalFriend> FriendList = new ArrayList<PersonalFriend>();

    //Business Associate Array
    public static BusinessAssociate newBusiness = new BusinessAssociate(null, null, null, null,null, null, null, null,null, null, null, null);
    public static ArrayList<BusinessAssociate> salaryList = new ArrayList<BusinessAssociate>();


    public static ArrayList<Person> addressBook = new ArrayList<Person>();
    private static Scanner sc = new Scanner(System.in);
    private static char choice;
    private static char type;


    public static void main(String[] args) throws IOException {

        boolean switcher = true;
        do {
            System.out.println("\n\tAddress Book Menu");
            System.out.println("\n\t\tEnter A to (A)dd Person ");
            System.out.println("\t\tEnter R to (R)emove Person");
            System.out.println("\t\tEnter M to (M)odify Entry");
            System.out.println("\t\tEnter S to (S)earch Address Book ");
            System.out.println("\t\tEnter L to (L)ist ALL (sorted) ");
            System.out.println("\t\tEnter D to (D)ownload to Disk ");
            System.out.println("\t\tEnter U to (U)pload from Disk ");
            System.out.println("\t\tEnter P to (P)rint Address Book ");
            System.out.println("\t\tEnter Q to Quit");
            System.out.print("\n\tPlease enter your choice: ");
            choice = sc.nextLine().toUpperCase().charAt(0);


            while ((choice != 'A') && (choice != 'R') && (choice != 'M')  && (choice != 'S') && (choice != 'L')&& (choice != 'D')&& (choice != 'U')&& (choice != 'P')&&(choice != 'Q')) {
                System.out.println("Invalid choice!  Please select (A)dd, (D)elete, (M)odify, (S)earch, (L)ist or (Q)uit: ");
                choice = sc.nextLine().toUpperCase().charAt(0);
            }


            switch (choice) {
            case 'A' :      
                if (choice == 'A') {
                    System.out.print("\nAdd a (F)riend or (B)usiness Associate? ");
                    type = sc.nextLine().toUpperCase().charAt(0);

                    while ((type != 'F') && (type != 'B')) {
                        System.out.print("Invalid choice!  Please select (F)riend or (B)usiness Associate: ");
                        type = sc.nextLine().toUpperCase().charAt(0);
                    }


                    if (type == 'F') {

                        addPersonFriend();

                    }

                    else if (type == 'B') {
                        addBusinessPerson();
                    }
                }


                break;

            case 'R' :
                deletePerson();
                break;

            case 'M' :
                modifyPerson();
                break;

            case 'S' :

                searchPerson();

                break;

            case 'L' :
                listPerson();
                break;

            case 'D' :
                downloadDisk();
                break;

            case 'U' :
                uploadDisk();
                break;

            case 'P' :
                printAddressBook();
                break;

            case 'Q' :
                switcher = false;

                break;


            }


        }
        while (switcher != false);
        System.out.println("Session Over");

    }


    private static void addPersonFriend() {
        System.out.println("\nFollow the prompts.");
        newFriend = new PersonalFriend(null, null, null, null, null, null, null, null, null, null,0,null);
        System.out.print("\nEnter First Name: ");
        newFriend.setfName(sc.nextLine());
        System.out.print("Enter Last Name: ");
        newFriend.setlName(sc.nextLine());
        System.out.print("Enter Address: ");
        newFriend.setAddress(sc.nextLine());
        System.out.print("Enter City: ");
        newFriend.setCity(sc.nextLine());
        System.out.print("Enter State: ");
        newFriend.setState(sc.nextLine());
        System.out.print("Enter Zip: ");
        newFriend.setZip(sc.nextLine());
        System.out.print("Enter Phone Number: ");
        newFriend.setPhone(sc.nextLine());
        System.out.print("Enter Cell Phone Number: ");
        newFriend.setCellphone(sc.nextLine());
        System.out.print("Enter Email Number: ");
        newFriend.setEmail(sc.nextLine());
        System.out.print("Enter Birthday: ");
        newFriend.setBirthday(sc.nextLine());
        System.out.print("Enter Age: ");
        newFriend.setAge(sc.nextInt());
        System.out.print("Enter Zodiac: ");
        newFriend.setZodiac(sc.nextLine());
        System.out.print(" ");
        newFriend.setZodiac(sc.nextLine());
        addressBook.add(newFriend);

        System.out.println("\nYou have successfully added a new person!");
    }

    private static void addBusinessPerson() {
        System.out.println("\nFollow the prompts.");
        newBusiness = new BusinessAssociate(null, null, null, null, null, null, null, null, null, null, null, null);
        System.out.print("\nEnter First Name: ");
        newBusiness.setfName(sc.nextLine());
        System.out.print("Enter Last Name: ");
        newBusiness.setlName(sc.nextLine());
        System.out.print("Enter Address: ");
        newBusiness.setAddress(sc.nextLine());
        System.out.print("Enter City: ");
        newBusiness.setCity(sc.nextLine());
        System.out.print("Enter State: ");
        newBusiness.setState(sc.nextLine());
        System.out.print("Enter Zip: ");
        newBusiness.setZip(sc.nextLine());
        System.out.print("Enter Phone Number: ");
        newBusiness.setPhone(sc.nextLine());
        System.out.print("Enter Cell Phone Number: ");
        newBusiness.setCellphone(sc.nextLine());
        System.out.print("Enter Email Number: ");
        newBusiness.setEmail(sc.nextLine());
        System.out.print("Enter Job Title: ");
        newBusiness.setJobtitle(sc.nextLine());
        System.out.print("Enter Fax Number: ");
        newBusiness.setFax(sc.nextLine());
        System.out.print("Enter Company Name: ");
        newBusiness.setCompany(sc.nextLine());      
        addressBook.add(newBusiness);

        System.out.println("\nYou have successfully added a new person!");
    }

    private static void deletePerson() {
        System.out.println("Enter first name of person: ");
        String deleteName = sc.nextLine();

        boolean foundMod = false;
        int index2 = 0;

        while (index2 < addressBook.size() && !foundMod) {
            if ( ((Person)addressBook.get(index2)).getfName().equalsIgnoreCase(deleteName)) {
                foundMod = true;
                addressBook.remove(index2);

                System.out.println("\nYou have successfully deleted this person.");
            }

            else {
                index2++;
            }

            if (foundMod)
            {}
            else
                System.out.println("Unknown");
        }

    }

    private static void modifyPerson() {

        newBusiness = new BusinessAssociate(null, null, null, null, null, null, null, null, null, null, null, null);
        newFriend = new PersonalFriend(null, null, null, null, null, null, null, null, null, null,0,null);


        System.out.print("Enter first name of person: ");
        sc.nextLine();



        if (newBusiness instanceof BusinessAssociate) {
            System.out.println("Change this business listing:  ");
            addBusinessPerson();
        }

        if (newFriend instanceof PersonalFriend) {
            System.out.println("This is a Personal Friend:  ");
            addPersonFriend();
        }


    }



    private static void searchPerson() {

        System.out.println("Enter first name of person: ");
        String findName = sc.nextLine();

        boolean found = false;
        int index = 0;

        while (index < addressBook.size() && !found) {
            if ( ((Person)addressBook.get(index)).getfName().equalsIgnoreCase(findName)) {
                found = true;
            }

            else {
                index++;
            }

            if (found)
                System.out.println("Found: " + addressBook.get(index));
            else{}

        }


    }

    private static void listPerson() {
        System.out.println("\nThere are " + addressBook.size() + " people in this address book.\n");
        Collections.sort(addressBook);


        for (int i = 0; i < addressBook.size(); i++) {
            System.out.println(addressBook.get(i));


        }
        System.out.println();



    }


    public static void downloadDisk() { 
        File file = new File("addressBookContents.dtd");


        // Create a file
        PrintWriter output = null;
        try {
            output = new PrintWriter(file);
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        // Write formatted output to the file
        output.println(addressBook);
        System.out.println("\nSaved to disk in the default folder for this program. \n");

        // Close the file
        output.close();

    }

    private static void uploadDisk() throws IOException {

        JFileChooser fileChooser = new JFileChooser();
        if (fileChooser.showOpenDialog(null)
                == JFileChooser.APPROVE_OPTION) {
            // Get the selected file
            java.io.File file = fileChooser.getSelectedFile();

            // Create a Scanner for the file
            Scanner input = new Scanner(file);

            // Read text from the file
            while (input.hasNext()) {
                System.out.println(input.nextLine());
            }

            // Close the file
            input.close();
        }
        else {
            System.out.println("No file selected");
        }


    }


    @SuppressWarnings("unchecked")
    private static void printAddressBook() {

        File file = new File("addressBookContents.txt");


        // Create a file
        PrintWriter output = null;
        try {
            output = new PrintWriter(file);
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        // Write formatted output to the file
        output.println(addressBook);
        System.out.println("\nPrinting Successful! \n");

        // Close the file
        output.close();

    }


}//ends class

import java.util.*；
导入java.io.*；
导入javax.swing.*；
公共类testAddressBook{
//个人好友数组
public static PersonalFriend newFriend=新PersonalFriend（null，null，null，null，null，null，null，0，null）；
public static ArrayList FriendList=new ArrayList（）；
//业务伙伴阵列
public static BusinessAssociate newBusiness=newbusinessassociate（null，null，null，null，null，null，null，null，null）；
public static ArrayList salaryList=new ArrayList（）；
public static ArrayList addressBook=new ArrayList（）；
专用静态扫描仪sc=新扫描仪（System.in）；
私有静态字符选择；
私有静态字符类型；
公共静态void main（字符串[]args）引发IOException{
布尔切换器=真；
做{
System.out.println（“\n\t服装手册菜单”）；
System.out.println（“\n\t\tEnter A to（A）dd Person”）；
System.out.println（“\t\tEnter R to（R）emove Person”）；
System.out.println（“\t\t输入M到（M）修改条目”）；
System.out.println（“\t\t输入到搜索地址簿”）；
System.out.println（“\t\tEnter L to（L）ist ALL（sorted）”；
System.out.println（“\t\t从D到（D）从磁盘加载”）；
System.out.println（“\t\tEnter U to（U）pload from Disk”）；
System.out.println（“\t\tEnter P to（P）rint地址簿”）；
System.out.println（“\t\tEnter Q to Quit”）；
System.out.print（“\n\t请输入您的选择：”）；
choice=sc.nextLine（）.toUpperCase（）.charAt（0）；
而（（选择！='A'）&&（选择！='R'）&&（选择！='M'）&（选择！='S'）&&（选择！='L'）&&（选择！='D'）&（选择！='U'）&（选择！='P'）&（选择！='Q'））{
System.out.println（“无效选择！请选择（A）dd、（D）elete、（M）odify、（S）earch、（L）ist或（Q）uit:”）；
choice=sc.nextLine（）.toUpperCase（）.charAt（0）；
}
开关（选择）{
案例“A”：
如果（选项=='A'）{
系统输出打印（“\n添加a（F）朋友或（B）业务助理？”）；
type=sc.nextLine（）.toUpperCase（）.charAt（0）；
而（（类型！='F'）&&（类型！='B'））{
系统输出打印（“无效选择！请选择（F）朋友或（B）业务伙伴：”；
type=sc.nextLine（）.toUpperCase（）.charAt（0）；
}
如果（类型='F'）{
addPersonFriend（）；
}
else if（类型='B'）{
addBusinessPerson（）；
}
}
打破
案例“R”：
deletePerson（）；
打破
案例“M”：
modifyPerson（）；
打破
案例S：
searchPerson（）；
打破
案例“L”：
listPerson（）；
打破
案例“D”：
下载磁盘（）；
打破
案例“U”：
上传磁盘（）；
打破
案例“P”：
printAddressBook（）；
打破
案例‘Q’：
切换器=假；
打破
}
}
while（switcher！=假）；
System.out.println（“会话结束”）；
}
私有静态void addPersonFriend（）{
System.out.println（“\n遵循提示”）；
newFriend=新的PersonalFriend（null，null，null，null，null，null，null，null，null，null，null，0，null）；
System.out.print（“\n输入名字：”）；
newFriend.setfName（sc.nextLine（））；
System.out.print（“输入姓氏：”）；
newFriend.setlName（sc.nextLine（））；
系统输出打印（“输入地址：”）；
setAddress（sc.nextLine（））；
系统输出打印（“输入城市：”；
newFriend.setCity（sc.nextLine（））；
系统输出打印（“进入状态：”）；
newFriend.setState（sc.nextLine（））；
System.out.print（“输入Zip:”）；
setZip（sc.nextLine（））；
系统输出打印（“输入电话号码：”）；
setPhone（sc.nextLine（））；
系统输出打印（“输入手机号码：”）；
setphone（sc.nextLine（））；
系统输出打印（“输入电子邮件号码：”）；
setEmail（sc.nextLine（））；
系统输出打印（“输入生日：”；
newFriend.setBirthday（sc.nextLine（））；
系统输出打印（“输入年龄：”；
newFriend.setAge（sc.nextInt（））；
系统输出打印（“输入十二生肖：”）；
newFriend.setZodiac（sc.nextLine（））；
系统输出打印（“”）；
newFriend.setZodiac（sc.nextLine（））；
add（newFriend）；
System.out.println（“\n您已成功添加了一个新人！”）；
}
私有静态无效addBusinessPerson（）{
System.out.println（“\n遵循提示”）；
newBusiness=newbusinessassociate（null，null，null，null，null，null，null，null，null，null，null）；
System.out.print（“\n输入名字：”）；
newBusiness.setfName（sc.nextLine（））；
System.out.print（“输入姓氏：”）；
newBusiness.setlName（sc.nextLine（））；
系统输出打印（“输入地址：”）；
newBusiness.setAddress（sc.nextLine（））；
系统输出打印（“输入城市：”；
newBusiness.setCity（sc.nextLine（））；
系统输出打印（“输入St
    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);
        String name = get("First Name", "\\D+", scanner);

    }

    public static String get(String field, String regEx, Scanner scanner) {
        while (true) {
            System.out.println("Enter " + field + " :");
            String str = scanner.nextLine();
            if (str.matches(regEx)) {
                return str;
            }
            System.out.println("Please enter a correct " + field);
        }
    }

while (true)
{
    *Your code that will ask user to enter a value for address field.*
    *assign the entered value to the address field*
    *This loop will continue until correct value is received and assigned.*
}