Stage 4: In the fourth file MailboxTester.java, you will need to do the following:

messages0.txt 

OriginalSender1 OriginalRecipient1 This is my original message1 OriginalSender2 OriginalRecipient2 This is my original message2 

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 4: In the fourth file MailboxTester.java, you will need to do the followings: 1. Create an object of Mailbox type