Assume the existence of an interface CommDevice with the fol

Assume the existence of an interface, CommDevice, with the following methods transmit: accepts two string parameters and returns nothing receive: accepts two string parameters and returns a boolean Define a class, Firewall, that implements the above interface, and has the following members: a string instance variable, permittedReceiver a slrwa instance variable, buffer a constructor that accepts a siring parameter that is used to initialize the permittedReceiver variable an implementation of the transmit method that assigns the first parameter to the destination instance variable and the second to the buffer variable. It also send to System, out the message \"Data scheduled for transmission to dest\" where dest is replaced by the actual value of the destination string. an implementation of the receiver method that checks if the first parameter is equal to the permittedReceiver and if so it sets the buffer instance variable to the second parameter and returns true; otherwise it sets the buffer to the empty string, prints the message \"Attempted breach of firewall by \" where is replaced by the method\'s first parameter, and returns false.

Solution

package exercise.java;

public class FireWall implements CommDevice{
   public String permittedreceiver;
   public String buffer;
   static String actual=\"ASDF\";
  
   FireWall(String actual){
       String permittedreceiver= actual ;
       String receiveone=actual;
       System.out.println(actual);
   }

   public void transmit(String transmitterone, String transmittertwo) {
       System.out.println(\"Data scheduled for transmission to\"+ permittedreceiver);
       System.out.println(transmittertwo);
   }

   public boolean receive(String receiveone, String receivetwo) {
      
       if (receiveone==permittedreceiver) {
           buffer=receivetwo;
           return true;
       }

       else{
           buffer=\"\";
           receiveone=\"Attempted breach of firewall by\";
           System.out.println(receiveone);
           return false;
       }
   }
   public static void main(String args[]){
       FireWall firewall= new FireWall(actual);
       firewall.receive(\"ASDF\", \" \");
      
   }

   @Override
   public void transmit() {
       // TODO Auto-generated method stub
   }

   @Override
   public void receive() {
       // TODO Auto-generated method stub
   }
}

--------------------------------------------------------------

package exercise.java;

public interface CommDevice {
   public void transmit();
   public void receive();
   void transmit(String transmitterone, String transmittertwo);

}