Java 读取文件

import java.io.File;  // 导入 File 文件类
import java.io.FileNotFoundException;  // 导入这个类来处理错误
import java.util.Scanner; // 导入 Scanner 类以读取文本文件

public class ReadFile {
  public static void main(String[] args) {
    try {
      File myObj = new File("filename.txt");
      Scanner myReader = new Scanner(myObj);
      while (myReader.hasNextLine()) {
        String data = myReader.nextLine();
        System.out.println(data);
      }
      myReader.close();
    } catch (FileNotFoundException e) {
      System.out.println("An error occurred.");
      e.printStackTrace();
    }
  }
}

Files in Java might be tricky, but it is fun enough!

import java.io.File;  // 导入 File 文件类

public class GetFileInfo { 
  public static void main(String[] args) {
    File myObj = new File("filename.txt");
    if (myObj.exists()) {
      System.out.println("File name: " + myObj.getName());
      System.out.println("Absolute path: " + myObj.getAbsolutePath());
      System.out.println("Writeable: " + myObj.canWrite());
      System.out.println("Readable " + myObj.canRead());
      System.out.println("File size in bytes " + myObj.length());
    } else {
      System.out.println("The file does not exist.");
    }
  }
}

File name: filename.txt

Absolute path: C:\Users\MyName\filename.txt

Writeable: true

Readable: true

File size in bytes: 0