Class getProtectionDomain() method in Java with Examples

The getProtectionDomain() method of java.lang.Class class is used to get the ProtectionDomain of this class. The method returns the specified ProtectionDomain of this class in the form of ProtectionDomain object.

Syntax:

public ProtectionDomain getProtectionDomain()

Parameter: This method does not accepts any parameter

Return Value: This method returns the specified ProtectionDomain of this class in the form of ProtectionDomain objects.

Exception This method throws:

• SecurityException if a security manager exists and its checkPermission method doesn’t allow getting the ProtectionDomain.

Below programs demonstrate the getProtectionDomain() method.

Example 1:

// Java program to demonstrate
// getProtectionDomain() method

import java.util.*;

public class Test {

    public Object obj;

    public static void main(String[] args)
        throws ClassNotFoundException
    {

        try {

            // returns the Class object for this class
            Class myClass = Class.forName("Test");

            System.out.println("Class represented by myClass: "
                               + myClass.toString());

            // Get the ProtectionDomain of myClass
            // using getProtectionDomain() method
            System.out.println("ProtectionDomain of myClass: "
                               + myClass.getProtectionDomain());
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

Output:

Class represented by myClass: class Test
java.security.AccessControlException: access denied ("java.lang.RuntimePermission" "getProtectionDomain")

Example 2:

// Java program to demonstrate
// getProtectionDomain() method

import java.util.*;

class Main {

    private Object obj;

    public static void main(String[] args)
        throws ClassNotFoundException, NoSuchFieldException
    {

        try {
            // returns the Class object for this class
            Class myClass = Class.forName("Main");

            System.out.println("Class represented by myClass: "
                               + myClass.toString());

            String ProtectionDomainName = "obj";

            // Get the ProtectionDomain of myClass
            // using getProtectionDomain() method
            System.out.println("ProtectionDomain of myClass: "
                               + myClass.getProtectionDomain());
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

Output:

Class represented by myClass: class Main
java.security.AccessControlException: access denied ("java.lang.RuntimePermission" "getProtectionDomain")

Reference: https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html#getProtectionDomain–