用java写一个电话号码管理及查询程序，程序界面为GUI

好的，下面是一个简单的电话号码管理及查询程序的Java代码示例，程序界面使用了Swing库，你可以参考：

import java.awt.*;
import java.awt.event.*;
import java.util.HashMap;
import java.util.Map;
import javax.swing.*;

public class PhoneBookGUI extends JFrame {
    private Map<String, String> phoneBook = new HashMap<String, String>();
    private JTextField nameField = new JTextField(10);
    private JTextField phoneField = new JTextField(10);
    
    public PhoneBookGUI() {
        setTitle("电话号码管理程序");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(300, 200);
        setLocationRelativeTo(null);
        
        JPanel inputPanel = new JPanel(new GridLayout(2, 2));
        inputPanel.add(new JLabel("姓名："));
        inputPanel.add(nameField);
        inputPanel.add(new JLabel("电话："));
        inputPanel.add(phoneField);
        
        JButton addButton = new JButton("添加联系人");
        addButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String name = nameField.getText();
                String phoneNumber = phoneField.getText();
                phoneBook.put(name, phoneNumber);
                JOptionPane.showMessageDialog(null, "联系人添加成功！");
                nameField.setText("");
                phoneField.setText("");
            }
        });
        
        JButton searchButton = new JButton("查询联系人");
        searchButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String searchName = nameField.getText();
                String searchPhoneNumber = phoneBook.get(searchName);
                if (searchPhoneNumber == null) {
                    JOptionPane.showMessageDialog(null, "该联系人不存在！");
                } else {
                    JOptionPane.showMessageDialog(null, searchName + " 的电话是：" + searchPhoneNumber);
                }
                nameField.setText("");
                phoneField.setText("");
            }
        });
        
        JButton deleteButton = new JButton("删除联系人");
        deleteButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String deleteName = nameField.getText();
                if (phoneBook.remove(deleteName) != null) {
                    JOptionPane.showMessageDialog(null, deleteName + " 的联系信息已删除！");
                } else {
                    JOptionPane.showMessageDialog(null, "该联系人不存在！");
                }
                nameField.setText("");
                phoneField.setText("");
            }
        });
        
        JButton exitButton = new JButton("退出程序");
        exitButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                System.exit(0);
            }
        });
        
        JPanel buttonPanel = new JPanel(new GridLayout(1, 4));
        buttonPanel.add(addButton);
        buttonPanel.add(searchButton);
        buttonPanel.add(deleteButton);
        buttonPanel.add(exitButton);
        
        add(inputPanel, BorderLayout.CENTER);
        add(buttonPanel, BorderLayout.SOUTH);
    }
    
    public static void main(String[] args) {
        PhoneBookGUI phoneBook = new PhoneBookGUI();
        phoneBook.setVisible(true);
    }
}

这个程序使用了JFrame、JPanel、JTextField、JButton和JOptionPane等Swing组件，用户可以通过输入不同的操作选项来实现添加、查询、删除联系人等功能，并且程序界面使用了GUI。