Java达成的简单电话号码储存

发布时间：2021-12-18 15:27:45 所属栏目：教程来源：互联网

导读：Java实现的简单电话号码储存： package com.sinosuperman.example; import java.io.BufferedReader; import java.io.File; import java.io.FileReader; import java.io.IOException; import java.util.StringTokenizer; import java.util.TreeMap; import ja

Java实现的简单电话号码储存：

package com.sinosuperman.example;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.StringTokenizer;
import java.util.TreeMap;

import javax.swing.JOptionPane;

public class PhoneNoteBook {

    private final File phoneNoteBookFile;

    private TreeMap<String, String> phoneNoteBookMap;

    public PhoneNoteBook(String fileName) throws IOException {
        phoneNoteBookMap = new TreeMap<String, String>();
        phoneNoteBookFile = new File(fileName);
        loadAllRecords();
    }

    private void loadAllRecords() throws IOException {
        BufferedReader reader = new BufferedReader(new FileReader(phoneNoteBookFile));
        String line = reader.readLine();
        while (line != null) {
            StringTokenizer str = new StringTokenizer(line, "t");
            String name = str.nextToken();
            String phone = str.nextToken();
            phoneNoteBookMap.put(name, phone);
            line = reader.readLine();
        }
        reader.close();
    }

    private void addRecord() {
        String name = JOptionPane.showInputDialog("Please enter the name:n");
        String phone = JOptionPane.showInputDialog("Please enter the phone:n");
        if (JOptionPane.showConfirmDialog(null, "Are you sure?") == JOptionPane.YES_OPTION) {
            phoneNoteBookMap.put(name, phone);
        } else {
            JOptionPane.showMessageDialog(null, "Operation has been canceled");
        }
    }

    private void updateRecord() {
        String name = JOptionPane.showInputDialog("Please enter the name:n");
        String phone = JOptionPane.showInputDialog("Please enter his/her new phone name:n");
        if (!phoneNoteBookMap.containsKey(name)) {
            if (JOptionPane.showConfirmDialog(null, "This name does not exist. Do you want to create a new one?") == JOptionPane.YES_OPTION) {
                phoneNoteBookMap.put(name, phone);
            } else {
                JOptionPane.showMessageDialog(null, "Operation has been canceled");
            }
        } if (JOptionPane.showConfirmDialog(null, "Are you sure to modify his/her phone number?") == JOptionPane.YES_OPTION) {
            phoneNoteBookMap.put(name, phone);
        } else {
            JOptionPane.showMessageDialog(null, "Operation has been canceled");
        }
    }

    private void searchRecord() {
        String name = JOptionPane.showInputDialog("Please the name for searching");
        if (phoneNoteBookMap.containsKey(name)) {
            JOptionPane.showMessageDialog(null, phoneNoteBookMap.get(name));
        } else {
            JOptionPane.showMessageDialog(null, "The name you are searching does not exists.");
        }
    }

    private void removeRecord() {
        String name = JOptionPane.showInputDialog("Please enter the name:n");
        if (!phoneNoteBookMap.containsKey(name)) {
            JOptionPane.showConfirmDialog(null, "This name does not exist. So you don't need to remove it.");
        } else if (JOptionPane.showConfirmDialog(null, "Are you sure to remove his/her record?") == JOptionPane.YES_OPTION) {
            phoneNoteBookMap.remove(name);
        } else {
            JOptionPane.showMessageDialog(null, "Operation has been canceled");
        }
    }

    public void display() {
        String message = "Please select an operation:n" +
                "Enter "1" to add a new record;n" +
                "Enter "2" to update a existing record;n" +
                "Enter "3" to find a phone number;n" +
                "Enter "4" to remove a existing record.n";

        int choice = 0;
        try {
            choice = Integer.parseInt(JOptionPane.showInputDialog(message));
            switch (choice) {
            case 1:
                addRecord();
                break;
            case 2:
                updateRecord();
                break;
            case 3:
                searchRecord();
                break;
            case 4:
                removeRecord();
                break;
            default:
            }
        } catch (NumberFormatException e) {
        }

        if (JOptionPane.showConfirmDialog(null, "Would you want to continue?") != JOptionPane.YES_OPTION) {
            JOptionPane.showMessageDialog(null, "Thank you.");
        } else {
            display();
        }
    }
}
测试驱动程序：

package com.sinosuperman.driver;

import java.io.IOException;

import com.sinosuperman.example.PhoneNoteBook;

public class Driver {
    public static void main(String[] args) throws IOException {
        PhoneNoteBook phoneNoteBook = new PhoneNoteBook("PhoneNoteBook.txt");
        phoneNoteBook.display();
    }
}

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