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Java SecurityManager checkMulticast() method with example

SecurityManager Class checkMulticast() method: Here, we are going to learn about the checkMulticast() method of SecurityManager Class with its syntax and example.
Submitted by Preeti Jain, on December 16, 2019

SecurityManager Class checkMulticast() method

  • checkMulticast() method is available in java.lang package.
  • checkMulticast() method invokes SocketPermission(i_add.getHostAddress(),"accept,connect") permission to send, receive, join , leave IP multicast.
  • checkMulticast() 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.
  • checkMulticast() method may throw an exception at the time of determining IP address.
    • SecurityException – This exception may throw when the calling thread is not allowed to use send, receive, join and leave IP multicast.
    • NullPointerException – This exception may throw when the given argument value is null.


    public void checkMulticast(InetAddress i_add);


  • InetAddress i_add – represents the address of Internet Group Type.

Return value:

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


// Java program to demonstrate the example 
// of void checkMulticast(InetAddress i_add)
// method of SecurityManager 


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

        // Instantiating a CheckMulticast object
        CheckMulticast cm = new CheckMulticast();

        // By using setSecurityManager() method is to set the
        // security manager

        // By using CheckMulticast(i_add) method is to check 
        // that ip address is accessible

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


Exception in thread "main" access denied ("" "" "connect,accept,resolve")
	at java.base/
	at java.base/
	at java.base/java.lang.SecurityManager.checkPermission(
	at java.base/java.lang.SecurityManager.checkMulticast(
	at CheckMulticast.main(


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