How to make a file read-only

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How to make a file read-only
Posted on: April 21, 2010 at 12:00 AM

This tutorial demonstrate how to create file and set its attribute read-only

Description:

This example demonstrate how to create a file and how to revoke the write permission of the same file. The method createFile creates a file with a specified name and setWritable(false) revoke the write persmission.. The method canWrite() returns booleasn value which whether the file is write-able or not..

Code:


import java.io.File;

import java.io.IOException;



public class FileAttributes {

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

    File file = new File("newfile.txt");

    if (file.exists()) {

      file.delete();

    }

    file.createNewFile();

    System.out.println("writable : " + file.canWrite());

    file.setWritable(false);

    System.out.println("writable : " + file.canWrite());

  }

}

Output:

Note : Execution of this program will create a file with specified name with read-only attribute. You can also check the the file properties, by default it is read-only.

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