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How to set the Permissions to a file in Java?

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In Java, FilePermission class is used to alter the permissions set on a file. Java FilePermission class contains the permission related to a directory or file. All the permissions are related to the path. The path can be of two types:

D:\\IO\\-: It indicates that the permission is associated with all subdirectories and files recursively.

D:\\IO\\*: It indicates that the permission is associated with all directory and files within this directory excluding subdirectories.

Let's see the simple example in which permission of a directory path is granted with read permission and a file of this directory is granted for write permission.

package com.javatpoint;  

import java.io.*;  

import java.security.PermissionCollection;  

public class FilePermissionExample{  

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

      String srg = "D:\\IO Package\\java.txt";  

      FilePermission file1 = new FilePermission("D:\\IO Package\\-", "read");  

      PermissionCollection permission = file1.newPermissionCollection();  

      permission.add(file1);  

           FilePermission file2 = new FilePermission(srg, "write");  

           permission.add(file2);  

         if(permission.implies(new FilePermission(srg, "read,write"))) {  

           System.out.println("Read, Write permission is granted for the path "+srg );  

             }else {  

            System.out.println("No Read, Write permission is granted for the path "+srg);            }  

     }   

}  

Output

Read, Write permission is granted for the path D:\IO Package\java.txt

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