编写java程序1.1把以下内容复制保存在一个文件english.txt中。 Joy in living comes from having fine emotions, trusting them, giving them the freedom of a bird in the open. Joy in living can never be assumed as a pose, or put on from the outside as a mask. People who have this joy do not need to talk about it; they radiate it. They just live out their joy and let it splash its sunlight and glow into other lives as naturally as bird sings. 1.2编写程序，读取文件english.txt的内容，输出以下内容： （1）总共出现的单词数量 （2）一共有多少个不同的单词 （3）按单词出现的频率从大到小输出单词，每行输出一个单词和数量，每一行格式如下： 单词:数量

以下是Java程序的示例代码，用于读取文件english.txt的内容并输出要求的结果：

import java.io.File;
import java.io.FileNotFoundException;
import java.util.*;

public class WordFrequency {
    public static void main(String[] args) {
        // 读取文件内容
        String fileName = "english.txt";
        List<String> words = readFile(fileName);

        // 统计单词数量
        int totalWords = words.size();
        System.out.println("(1) 总共出现的单词数量: " + totalWords);

        // 统计不同单词数量
        int uniqueWords = countUniqueWords(words);
        System.out.println("(2) 一共有多少个不同的单词: " + uniqueWords);

        // 统计单词频率并按照频率从大到小排序输出
        Map<String, Integer> wordFrequency = countWordFrequency(words);
        System.out.println("(3) 按单词出现的频率从大到小输出单词:");
        printWordFrequency(wordFrequency);
    }

    // 读取文件内容并返回单词列表
    public static List<String> readFile(String fileName) {
        List<String> words = new ArrayList<>();
        try {
            File file = new File(fileName);
            Scanner scanner = new Scanner(file);
            while (scanner.hasNext()) {
                String word = scanner.next().toLowerCase();
                word = word.replaceAll("[^a-zA-Z]", ""); // 只保留字母
                if (!word.isEmpty()) {
                    words.add(word);
                }
            }
            scanner.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
        return words;
    }

    // 统计不同单词数量
    public static int countUniqueWords(List<String> words) {
        Set<String> uniqueWords = new HashSet<>(words);
        return uniqueWords.size();
    }

    // 统计单词频率
    public static Map<String, Integer> countWordFrequency(List<String> words) {
        Map<String, Integer> wordFrequency = new HashMap<>();
        for (String word : words) {
            wordFrequency.put(word, wordFrequency.getOrDefault(word, 0) + 1);
        }
        return wordFrequency;
    }

    // 按照频率从大到小排序并输出单词及数量
    public static void printWordFrequency(Map<String, Integer> wordFrequency) {
        List<Map.Entry<String, Integer>> sortedList = new ArrayList<>(wordFrequency.entrySet());
        sortedList.sort(Map.Entry.comparingByValue(Comparator.reverseOrder()));
        for (Map.Entry<String, Integer> entry : sortedList) {
            System.out.println(entry.getKey() + ": " + entry.getValue());
        }
    }
}

请确保将文件english.txt放在与程序相同的目录下，并运行上述代码即可得到结果。