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按行讀取

public static void readFile(){String pathname = "E:/project/java/idea項目/java學習/test.txt";String line;try{FileReader reader = new FileReader(pathname);BufferedReader br = new BufferedReader(reader);while ((line=br.readLine())!=null){System.out.println(line);}} catch (IOException e){e.printStackTrace();} }

寫入文件

public static void writeFile(){try{String pathname = "E:/project/java/idea項目/java學習/test.txt";File writeName = new File(pathname);FileWriter writer = new FileWriter(writeName);BufferedWriter out = new BufferedWriter(writer);out.write("666");out.write("1\r2\n3");out.flush(); // 把緩存區內容壓入文件} catch (IOException e){e.printStackTrace();} }

文件內容：

總結

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