การอ่านและเขียนไฟล์ข้อความ

บทนำ

Files.readAllLines

โค้ด: readAllLines

public class Main {
  public static void main(String[] args) throws java.io.IOException {
    java.nio.file.Path p = java.nio.file.Paths.get("example.txt");
    java.util.List<String> lines = java.nio.file.Files.readAllLines(p);
    for (String line : lines) {
      System.out.println(line);
    }
  }
}

บทนำ BufferedReader

โค้ด: BufferedReader

public class Main {
  public static void main(String[] args) {
    java.nio.file.Path p = java.nio.file.Paths.get("example.txt");
    try (java.io.BufferedReader br = java.nio.file.Files.newBufferedReader(p)) {
      String line;
      while ((line = br.readLine()) != null) {
        System.out.println(line);
      }
    } catch (java.io.IOException e) {
      System.out.println("Error: " + e.getMessage());
    }
  }
}

โค้ด: BufferedWriter

public class Main {
  public static void main(String[] args) {
    java.nio.file.Path p = java.nio.file.Paths.get("output.txt");
    try (java.io.BufferedWriter bw = java.nio.file.Files.newBufferedWriter(p)) {
      bw.write("Hello");
      bw.newLine();
      bw.write("World");
    } catch (java.io.IOException e) {
      System.out.println("Error: " + e.getMessage());
    }
  }
}

ตรวจสอบ BufferedReader

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