Java示例文件只读

import java.io.File;

import java.io.IOException;



public class FileReadAttribute {

   public static void main(String[] args) throws IOException {

      File file = new File("c:/file.txt");

      file.setReadOnly();



      if(file.canWrite()) {

         System.out.println("This file is writable");

      } else {

         System.out.println("This file is read only");

      }

      file.setWritable(true);

      if(file.canWrite()) {

         System.out.println("This file is writable");

      } else {

         System.out.println("This file is read only");

      }

   }

}