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Java SecurityManager checkPropertiesAccess() method with example

SecurityManager Class checkPropertiesAccess() method: Here, we are going to learn about the checkPropertiesAccess() method of SecurityManager Class with its syntax and example.
Submitted by Preeti Jain, on December 17, 2019

SecurityManager Class checkPropertiesAccess() method

• checkPropertiesAccess() method is available in java.lang package.
• checkPropertiesAccess() method invokes checkPermission with the PropertyPermission("*", "read, write") permission to give access to properties.
• checkPropertiesAccess() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
• checkPropertiesAccess() method may throw an exception at the time of accessing properties.
  SecurityException – This exception may throw when the calling thread does not have the right to access or update system properties.

Syntax:

    public void checkPropertiesAccess();

Parameter(s):

• It does not accept any parameter.

Return value:

The return type of this method is void, it returns nothing.

Example:

// Java program to demonstrate the example 
// of void checkPropertiesAccess ()
// method of SecurityManager 

public class CheckPropertiesAccess extends SecurityManager {
    public static void main(String[] args) {
        // By using setProperty() method is to set the policy property 
        // with security manager
        System.setProperty("java.security.policy", "file:/C:/java.policy");

        // Instantiating a CheckPropertiesAccess object
        CheckPropertiesAccess cpa = new CheckPropertiesAccess();

        // By using setSecurityManager() method is to set the
        // security manager
        System.setSecurityManager(cpa);

        // By using checkPropertiesAccess() method is to check
        // accessing of system properties
        cpa.checkPropertiesAccess();

        // Display the message
        System.out.println("Not Restricted..");
    }
}

Output

Exception in thread "main" java.security.AccessControlException: access denied ("java.util.PropertyPermission" "*" "read,write")
	at java.base/java.security.AccessControlContext.checkPermission(AccessControlContext.java:472)
	at java.base/java.security.AccessController.checkPermission(AccessController.java:897)
	at java.base/java.lang.SecurityManager.checkPermission(SecurityManager.java:322)
	at java.base/java.lang.SecurityManager.checkPropertiesAccess(SecurityManager.java:1034)
	at CheckPropertiesAccess.main(CheckPropertiesAccess.java:20)