FilePermission implies(Permission) in Java

implies(Permission): This method is available in the java.io.FilePermission class of Java.

Syntax:

boolean java.io.FilePermission.implies(Permission p)

This method takes one argument. This method checks if this FilePermission object "implies" the specified permission.

More specifically, this method returns true if:

1. p is an instance of FilePermission.

2. p's actions are a proper subset of this object's actions.

3. p's pathname is implied by this object pathname.

Parameters: One parameter is required for this method.

p: the permission to check against.

Returns: true if the specified permission is not null and is implied by this object, false otherwise.

Exceptions: NA

Approach

Java

import java.io.FilePermission;
import java.security.Permission;

public class FilePermissionimplies {
    public static void main(String[] args) {

        String path = "D:\\hello.txt";
        String actions = "read";
        FilePermission filePermission = 
                  new FilePermission(path, actions);

        Permission p = new Permission("read") {

            /**
             * 
             */
            private static final long serialVersionUID = 1L;

            @Override
            public boolean implies(Permission permission) {
                // TODO Auto-generated method stub
                return false;
            }

            @Override
            public int hashCode() {
                // TODO Auto-generated method stub
                return 0;
            }

            @Override
            public String getActions() {
                // TODO Auto-generated method stub
                return null;
            }

            @Override
            public boolean equals(Object obj) {
                // TODO Auto-generated method stub
                return false;
            }
        };

        System.out.println(filePermission.implies(p));
    }
}

Output:

false

Some other methods of FilePermission

equals(Object): This method checks two FilePermission objects for equality. Checks that obj is a FilePermission, and has the same pathname and actions as this object.

FilePermission(String, String): This method creates a new FilePermission object with the specified actions.

getActions(): This method returns the "canonical string representation" of the actions.

hashCode(): This method returns the hash code value for this object.

implies(Permission): This method checks if this FilePermission object "implies" the specified permission.

newPermissionCollection(): This method returns a new PermissionCollection object for storing FilePermission objects.