SocketPermission class in java

java.net.SocketPermission

This class represents access to a network via sockets. A SocketPermission consists of a host specification and a set of "actions" specifying ways to connect to that host. The host is specified as

host = (hostname | IPv4address | iPv6reference) [:portrange]

portrange = portnumber | -portnumber | portnumber-[portnumber]

The host is expressed as a DNS name, as a numerical IP address, or as "localhost" (for the local machine). The wildcard "*" may be included once in a DNS name host specification. If it is included, it must be in the leftmost position, as in "*.example.com".

Some methods of SocketPermission class

SocketPermission(String, String): This method creates a new SocketPermission object with the specified actions. The host is expressed as a DNS name, or as a numerical IP address.

equals(Object): This method checks two SocketPermission objects for equality.

getActions(): This method returns the canonical string representation of the actions. Always returns present actions in the following order: connect, listen, accept, resolve.

hashCode(): This method returns the hash code value for this object.

implies(Permission): This method checks if this socket permission object "implies" the specified permission.

newPermissionCollection(): This method returns a new PermissionCollection object for storing SocketPermission objects.