java 编写电话号码查询的gui程序

下面是一个简单的Java电话号码查询的GUI程序示例：

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class PhoneBookGUI extends JFrame implements ActionListener {
    private JTextField nameField, phoneField;
    private JButton addButton, searchButton;
    private JTextArea displayArea;
    private PhoneBook phoneBook;

    public PhoneBookGUI() {
        super("Phone Book");

        // Create the phone book
        phoneBook = new PhoneBook();

        // Set up the GUI components
        nameField = new JTextField(10);
        phoneField = new JTextField(10);
        addButton = new JButton("Add");
        searchButton = new JButton("Search");
        displayArea = new JTextArea(10, 20);

        // Add action listeners to the buttons
        addButton.addActionListener(this);
        searchButton.addActionListener(this);

        // Create the panel for the input fields and buttons
        JPanel inputPanel = new JPanel();
        inputPanel.setLayout(new FlowLayout());
        inputPanel.add(new JLabel("Name:"));
        inputPanel.add(nameField);
        inputPanel.add(new JLabel("Phone:"));
        inputPanel.add(phoneField);
        inputPanel.add(addButton);
        inputPanel.add(searchButton);

        // Create the panel for the display area
        JScrollPane scrollPane = new JScrollPane(displayArea);
        JPanel displayPanel = new JPanel();
        displayPanel.setLayout(new BorderLayout());
        displayPanel.add(scrollPane, BorderLayout.CENTER);

        // Add the panels to the content pane
        Container contentPane = getContentPane();
        contentPane.setLayout(new BorderLayout());
        contentPane.add(inputPanel, BorderLayout.NORTH);
        contentPane.add(displayPanel, BorderLayout.CENTER);

        // Set the size and make the GUI visible
        setSize(300, 300);
        setVisible(true);
    }

    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == addButton) {
            // Add a phone number to the phone book
            String name = nameField.getText();
            String phone = phoneField.getText();
            phoneBook.addPhoneNumber(name, phone);
            displayArea.setText("Phone number added.");
            nameField.setText("");
            phoneField.setText("");
        } else if (e.getSource() == searchButton) {
            // Search for a phone number in the phone book
            String name = nameField.getText();
            String phone = phoneBook.getPhoneNumber(name);
            if (phone != null) {
                displayArea.setText("Phone number: " + phone);
            } else {
                displayArea.setText("Phone number not found.");
            }
            phoneField.setText("");
        }
    }

    public static void main(String[] args) {
        PhoneBookGUI phoneBookGUI = new PhoneBookGUI();
        phoneBookGUI.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
}

class PhoneBook {
    private java.util.Map<String, String> phoneNumbers;

    public PhoneBook() {
        phoneNumbers = new java.util.HashMap<String, String>();
    }

    public void addPhoneNumber(String name, String phone) {
        phoneNumbers.put(name, phone);
    }

    public String getPhoneNumber(String name) {
        return phoneNumbers.get(name);
    }
}

该程序有一个简单的GUI，包含两个文本框和两个按钮。用户可以输入一个人的姓名和电话号码，然后按下“Add”按钮将该信息添加到电话簿中。用户还可以输入一个人的姓名，并按下“Search”按钮来查找该人的电话号码。如果电话号码被找到，它将在文本区域中显示，否则将显示“Phone number not found.”。