java英语词典管理程序

以下是一个简单的Java英语词典管理程序的示例：

import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;

public class DictionaryManager {
    private Map<String, String> dictionary;

    public DictionaryManager() {
        dictionary = new HashMap<>();
    }

    public void addWord(String word, String definition) {
        dictionary.put(word, definition);
    }

    public String getDefinition(String word) {
        return dictionary.get(word);
    }

    public void removeWord(String word) {
        dictionary.remove(word);
    }

    public void printAllWords() {
        for (String word : dictionary.keySet()) {
            System.out.println(word);
        }
    }

    public static void main(String[] args) {
        DictionaryManager manager = new DictionaryManager();
        Scanner scanner = new Scanner(System.in);

        while (true) {
            System.out.println("请选择操作：");
            System.out.println("1. 添加单词");
            System.out.println("2. 查找单词");
            System.out.println("3. 删除单词");
            System.out.println("4. 列出所有单词");
            System.out.println("5. 退出");

            int choice = scanner.nextInt();
            scanner.nextLine();

            switch (choice) {
                case 1:
                    System.out.println("请输入单词：");
                    String word = scanner.nextLine();
                    System.out.println("请输入定义：");
                    String definition = scanner.nextLine();
                    manager.addWord(word, definition);
                    System.out.println("添加成功！");
                    break;
                case 2:
                    System.out.println("请输入单词：");
                    word = scanner.nextLine();
                    definition = manager.getDefinition(word);
                    if (definition != null) {
                        System.out.println(definition);
                    } else {
                        System.out.println("未找到该单词！");
                    }
                    break;
                case 3:
                    System.out.println("请输入单词：");
                    word = scanner.nextLine();
                    manager.removeWord(word);
                    System.out.println("删除成功！");
                    break;
                case 4:
                    manager.printAllWords();
                    break;
                case 5:
                    System.exit(0);
                default:
                    System.out.println("无效的选择！");
            }
        }
    }
}

该程序使用了HashMap来存储单词和定义的对应关系，并提供了添加、查找、删除和列出所有单词的功能。用户可以通过控制台输入选择来执行相应的操作。