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Java FilePermission Class
Java FilePermission class contains the permission related to a directory or file. All the permissions are related with path. The path can be of two types:
1) D:\IO\-: It indicates that the permission is associated with all sub directories and files recursively.
2) D:\IO\*: It indicates that the permission is associated with all directory and files within this directory excluding sub directories.
Java FilePermission class declaration
Let’s see the declaration for Java.io.FilePermission class:
Methods of FilePermission class
| Method | Description |
|---|---|
| ByteArrayOutputStream() | Creates a new byte array output stream with the initial capacity of 32 bytes, though its size increases if necessary. |
| ByteArrayOutputStream(int size) | Creates a new byte array output stream, with a buffer capacity of the specified size, in bytes. |
Java FilePermission class methods
| Method | Description |
|---|---|
| int hashCode() | It is used to return the hash code value of an object. |
| String getActions() | It is used to return the “canonical string representation” of an action. |
| boolean equals(Object obj) | It is used to check the two FilePermission objects for equality. |
| boolean implies(Permission p) | It is used to check the FilePermission object for the specified permission. |
| PermissionCollection newPermissionCollection() | It is used to return the new PermissonCollection object for storing the FilePermission object. |
Java FilePermission Example
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.
Output
Read, Write permission is granted for the path D:IO Packagejava.txt
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