java.nio.file.LinkPermission Class in Java
Last Updated :
19 Jul, 2022
The java.nio.file.LinkPermission class handles permissions for link creation operations. The permission allowed by these class are as follows:
Permission name
|
What permission allows
|
Risk of granting this permission
|
hard
|
This permission allows adding an existing file to a directory. This operation is also known as creating a hard link.
|
The attacker may have access to all files because this permission allows linking to any file in the file system.
|
symbolic
|
This permission allows creating file pointers. This operation is also known as creating soft/symbolic link.
|
The attacker may have access to all files because this permission allows linking to any file in the file system.
|
Class declaration:
public final class LinkPermission
extends BasicPermission
Constructor:
Constructor |
Description |
LinkPermission(String name) |
This constructor is used to create a LinkPermission with the specified name. |
LinkPermission(String name, String actions) |
This constructor is used to create a LinkPermission with the specified name and action. |
Methods inherited from class java.security.BasicPermission:
Method |
Description |
equals(Object obj) |
This method checks whether the two BasicPermission objects are equal or not |
getActions() |
This method returns the actions in String format |
hashCode() |
This method returns the hash code value for this object |
implies(Permission permission) |
This method checks whether the given permission is implied by this object or not |
newPermissionCollection() |
This method returns a new PermissionCollection object |
Example 1: Java program to create a new hard LinkPermission
Java
import java.nio.file.LinkPermission;
import java.security.Permission;
public class GFG {
public static void main(String[] args)
{
try {
Permission permission
= new LinkPermission( "hard" );
System.out.println(permission.getName());
System.out.println(permission.getClass());
System.out.println(permission.hashCode());
}
catch (Exception e) {
e.printStackTrace();
}
}
}
|
Output
hard
class java.nio.file.LinkPermission
3195115
Example 2: Java program to create a new symbolic LinkPermission
Java
import java.nio.file.LinkPermission;
import java.security.Permission;
public class GFG {
public static void main(String[] args)
{
try {
Permission permission
= new LinkPermission( "symbolic" );
System.out.println(permission.getName());
System.out.println(permission.getClass());
System.out.println(permission.hashCode());
}
catch (Exception e) {
e.printStackTrace();
}
}
}
|
Output
symbolic
class java.nio.file.LinkPermission
1787985074
Example 3: Java program to compare two LinkPermission objects
Java
import java.nio.file.LinkPermission;
import java.security.Permission;
public class GFG {
public static void main(String[] args)
{
try {
Permission hardPermission
= new LinkPermission( "hard" );
Permission softPermission
= new LinkPermission( "symbolic" );
if (hardPermission.equals(softPermission)) {
System.out.println(
"Both permission are equal" );
}
else {
System.out.println(
"Both permission are not equal" );
}
}
catch (Exception e) {
e.printStackTrace();
}
}
}
|
Output
Both permission are not equal
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