This is for BlueJ

messages1.txt Eric_A_Bially Zachary_B_Howard This_is_test_message_1 Brett_V_Bohorquez Marcus_R_McPartland This_is_test_message_2 Aron_I_Brewster Patrick_C_Nauman This_is_test_message_3 Joshua_J_Dennis Jacob_G_Neff This_is_test_message_4 Stephen_M_Gentzler Kevin_A_Orlowski This_is_test_message_5 Adam_James_D_Geosits Oscar_J_Phillips This_is_test_message_6 Rudolf_C_Gouker Andy_R_Sayer This_is_test_message_7 Zachary_B_Howard Craig_Smith This_is_test_message_8 

Stage 3: In the third file Mailbox.java, create a class named Mailbox that models a mailbox that contains a list of email messages. It should contain the following: Private instance variables messages and numOfMessages Hint: the type for messages should be ArrayList public MailboxC) * public void addMessage (Message m) public Message getMessage(int i) public int getNumberOfMessages ) A default constructor to initialize two instance variables Add a new message into the list messages, and update the numOfMessages Return the z message from the list Return the number of messsages in mailbox public void removeMessage(int i) Remove the ith message from the list public void printAllMessages ) Print out all messages in the mailbox Stage 4: In the fourth file MailboxTester.java, you will need to do the followings: 1. Create an object of Mailbox type