在Java 中使用BufferReader 從頭到尾讀取檔案
問題:
問題:
<code class="java">import java.io.BufferedReader; import java.io.File; import java.io.FileNotFoundException; import java.io.FileReader; import java.io.IOException; import java.io.RandomAccessFile; public class ReverseFileReader { public static void main(String[] args) { // Create a RandomAccessFile to access the file RandomAccessFile file = null; BufferedReader reader = null; try { file = new RandomAccessFile("filepath.txt", "r"); // Get the file size long fileSize = file.length(); // Start reading from the end of the file file.seek(fileSize - 1); // Initialize a BufferedReader to read from the RandomAccessFile reader = new BufferedReader(new FileReader(file.getFD())); // Read the file line by line in reverse order while ((file.getFilePointer()) > 0) { // Get the current line String line = reader.readLine(); // Adjust the file pointer to the beginning of the previous line file.seek(file.getFilePointer() - line.length() - 1); // Print the line System.out.println(line); } } catch (FileNotFoundException e) { System.out.println("File not found."); } catch (IOException e) { System.out.println("Error reading file."); } finally { // Close the file and the reader try { if (file != null) file.close(); if (reader != null) reader.close(); } catch (IOException e) {} } } }</code>
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