java stringtokenizer怎樣處理注釋

Java StringTokenizer 類本身并不支持處理注釋。但是，您可以通過編寫自定義代碼來實現這一功能。以下是一個簡單的示例，展示了如何使用 StringTokenizer 處理 Java 源代碼文件中的注釋：

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

public class CommentProcessor {
    public static void main(String[] args) {
        String inputFile = "path/to/your/java/source/file.java";
        try {
            processComments(inputFile);
        } catch (IOException e) {
            System.err.println("Error reading file: " + e.getMessage());
        }
    }

    public static void processComments(String inputFile) throws IOException {
        BufferedReader reader = new BufferedReader(new FileReader(inputFile));
        String line;
        StringTokenizer tokenizer;
        StringBuilder comment = new StringBuilder();

        while ((line = reader.readLine()) != null) {
            tokenizer = new StringTokenizer(line);
            while (tokenizer.hasMoreTokens()) {
                if (tokenizer.nextToken().equals("//")) {
                    // Found a single-line comment, add it to the comment buffer
                    while (tokenizer.hasMoreTokens() && !tokenizer.nextToken().equals("\n")) {
                        comment.append(tokenizer.nextToken()).append(" ");
                    }
                    System.out.println(comment.toString().trim());
                    comment.setLength(0); // Clear the comment buffer
                } else if (tokenizer.nextToken().equals("/*")) {
                    // Found a multi-line comment, add it to the comment buffer
                    while (tokenizer.hasMoreTokens() && !(tokenizer.nextToken().equals("*/"))) {
                        comment.append(tokenizer.nextToken()).append(" ");
                    }
                    System.out.println(comment.toString().trim());
                    comment.setLength(0); // Clear the comment buffer
                } else {
                    // Not a comment, reset the comment buffer and process the token
                    comment.setLength(0);
                    System.out.print(tokenizer.nextToken() + " ");
                }
            }
            System.out.println();
        }

        reader.close();
    }
}

這個示例中的 processComments 方法會讀取指定的 Java 源代碼文件，并使用 StringTokenizer 逐個處理文件中的標記。當遇到注釋時（單行或多行），它會將注釋內容添加到 comment 字符串構建器中，并在遇到非注釋標記時輸出注釋內容并清空構建器。