In this example we shall show you how to create and check an access permission to a file, using the AccessController Class. To create a new permission to a file and check the access permission of a file, one should perform the following steps:
- Create a new FilePermission with the specified path of the file and action mode of the permission.
- Use the
checkPermission(Permission perm)API method of the AccessController so as to check whether the access request indicated by the specified permission should be allowed or denied. If a requested access is allowed, checkPermission returns quietly. If denied, an AccessControlException is thrown.
Let’s take a look at the code snippet that follows:
package com.javacodegeeks.snippets.core;
import java.io.FilePermission;
import java.security.AccessControlException;
import java.security.AccessController;
public class Main {
public static void main(String args[]) {
FilePermission fp = new FilePermission("C:/Users/nikos7/Desktop/output.txt", "read");
try {
AccessController.checkPermission(fp);
} catch (AccessControlException ex) {
System.out.println("Access denied");
}
}
}
Output:
Access denied
This was an example of how to create and check access permission to a file in Java.
