Java.io.FilePermission.implies() Method

Advertisements


Description

The java.io.FileOutputStream.implies(Permission p) method tests if this FilePermission object "implies" the specified permission.

The method returns true if:

  • p is an instance of file permission.
  • Actions of p are a proper subset of this object's action.
  • Pathname of p is implied by this object's pathname.

Declaration

Following is the declaration for java.io.FilePermission.implies(Permission p) method:

public boolean implies(Permission p)

Parameters

  • p -- permission to check against

Return Value

This method returns true if the specified permission is not null and is implied by this object, else false.

Exception

  • NA

Example

The following example shows the usage of java.io.FilePermission.implies(Permission p) method.

package com.tutorialspoint;

import java.io.FilePermission;
import java.io.IOException;

public class FilePermissionDemo {
   public static void main(String[] args) throws IOException {
      
      FilePermission fp = null;
      FilePermission fp1 = null;
      FilePermission fp2 = null;
      FilePermission fp3 = null;
      boolean bool=false;
      
      try{
         // create new file permissions
         fp = new FilePermission("C://test.txt", "read");
         fp1 = new FilePermission("C://test.txt", "write");
         fp2 = new FilePermission("C://test1.txt", "read");
         fp3 = new FilePermission("C://test.txt", "read");
         
         // tests if implied by this object
         bool = fp.implies(fp1);
         
         // print
         System.out.println(bool);
         
         bool = fp.implies(fp2);
         System.out.println(bool);
         
         bool = fp.implies(fp3);
         System.out.print(bool);
         
      }catch(Exception ex){
         // if an error occurs
         ex.printStackTrace();
      }
   }
}

Let us compile and run the above program, this will produce the following result:

false
false
true



Advertisements
Advertisements