代写Reaction Controller、代写java程序语言、systems留学生代做、代做Java设计

日期：2019-09-06 10:48

Assignment 1

The due date: 11:59pm, Friday, 6th of September 2019.

This assignment is worth 14% of the total course mark.

1. Objective

The purpose of this assignment is to make you familiar with the problems posed by

event-driven systems. As a supplementary task you also need to implement a simple

Graphical User Interface.

2. Specification

Exercise 1 Simple Reaction Controller

Imagine that you have been hired by an electronics company to build the software for

a simple Reaction-Timer game. The reaction timer has two inputs: a coin-slot that

starts the game and a go/stop button that controls it. There is also a display that

indicates to the player what he/she should do next. The machine behaves as follows.

? Initially, the display shows “Insert coin”, and the machine waits for a player to do so.

? When the player inserts a coin, the machine displays “Press GO!” and waits for the

player to do so.

? When the player presses the go/stop button, the machine displays “Wait...” for a

random time between 1.0 and 2.5 seconds. After the random delay expires, the

machine displays a time-value that increments every 10 milliseconds, starting at zero.

The player must now press the go/stop button as soon as possible – the goal of the

game is to show fast reactions! If the player presses the go/stop button during the

random delay period, i.e. the player tries to “guess” when the delay will expire, the

machine aborts the game and immediately demands another coin. To put it simply,

there is no reward for trying to cheat! If the user has not pressed stop after two

seconds, the machine will stop automatically – no living person could be that slow!

? Whether the player has pressed the go/stop button within the two seconds waiting

time period or not, the machine displays the final timer value for three seconds, then

the game is over until another coin is inserted. If the player presses the go/stop button

while the measured reaction time is being displayed, the machine immediately

displays “Insert coin”.

Exercise 2 Enhanced Reaction Controller

After showing the basic reaction timer machine to potential customers, the marketing

department has found that some of them would like to pay more for a deluxe reaction

timer that allows multiple games after payment of a single coin. In this machine, when

a coin is inserted, the player is allowed to play three games. The operating sequence

is very similar to the previous one: insert coin, press the go/stop button, wait random

delay, press the go/stop button, then display the time for three seconds. If the

machine has not yet completed three games, it then displays “Wait...”. Subsequently,

it waits a (new) random delay and proceeds further as in the first game. After

displaying the time for the last game, the machine shows the average time “Average=

t.tt” for five seconds, then the game is over. The enhanced reaction controller

should fulfil the following requirements.

? If after inserting the coin the player fails to press go/stop within ten seconds, the

game is over.

? If the player presses the go/stop button during the waiting period, the game is

aborted, and the average value is not displayed. Once again, no reward for cheating!

? If the player presses the go/stop button while the machine is displaying a reactiontime

value, the machine immediately moves on to the next game (or shows the

average time) without waiting for the full three seconds of display time.

? If the player presses the go/stop button while the machine is displaying the average

time, the game is immediately over.

3. Program Components

Your program must consist of the following parts.

? A controlling program named ReactionMachine is provided as a base to test your

controllers.

? SimpleReactionController and EnhancedReactionController are the modules which

you need to realize. The both components must conform to the interface Controller.

This is the main body of the exercises. You are free to write these components in any

way you choose, so long as they implement the required interfaces. You must write

SimpleReactionController.java that functions like the simple reaction machine

described above and EnhancedReactionController.java that behaves like the

enhanced multi-game reaction machine.

? A Display is a GUI component which you need to write to test your reaction machine.

It must conform to the Gui interface. The GUI must have a button labelled “Coin

Inserted” and a button labelled “Go/Stop”. There must be a display region to show the

messages of the machine. Times must be displayed with two decimal places. For

example, a value of 1.5 seconds must be shown as 1.50. Do not go to too much effort

to make your GUI “beautiful”. We are more concerned here with correct operation of

your controllers rather than with your artistic ability! You must write Display.java that

implements the necessary GUI functions.

Important. To ensure that we can automatically test your program, you must comply

with the following constraints.

? Obviously, your program needs a source of timing information. You must obtain this

information by implementing the tick method in your controller. The ReactionMachine

class guarantees to call this method every 10 milliseconds. Do not use a Java timer, or

your program cannot be tested and will fail all the tests.

? Your program also needs a source of random numbers. You must obtain your

random numbers by calling the getRandom() method in the interface Random. Do not

use the Java Random class, or your program will fail all the tests.

4. JAVA Files Provided

We provide the following java files for you.

? Controller.java contains an interface specification. Both of your reaction controllers

must implement this interface.

? Gui.java contains an interface specification. Your GUI must implement this interface.

? Random.java contains an interface specification for the random number generator.

? ReactionMachine.java contains a simple driver program that will allow you to test

your reaction controllers.

Please, be aware that you cannot alter the interface files, or we will not be able to test

your program. Your display and two controllers must work correctly with

ReactionMachine.

5. Running the Driver Program

You can run the driver program by typing: java ReactionMachine c, where c is the name

of the controller you want to test. For example, java Reactionmachine

SimpleReactionController will run the SimpleReactionController program. You are, of

course, free to modify this program or build another one to help you with your testing.

6. Submission instructions for programming code

First, type the following command, all on one line (replacing aXXXXXXX with your

username):

svn mkdir --parents -m "EDC"

https://version-control.adelaide.edu.au/svn/aXXXXXXX/2019/s2/edc/assignment1

Then, check out this directory and add your files:

svn co https://versioncontrol.adelaide.edu.au/svn/aXXXXXXX/2019/s2/edc/assignment1

cd assignment1

svn add SimpleReactionController.java

svn add EnhancedReactionController.java

svn add Display.java

svn commit -m "assignment1 solution"

Next, go to the web submission system at:

https://cs.adelaide.edu.au/services/websubmission/

Navigate to 2019, Semester 2, Adelaide, Event Driven Computing, then Assignment 1.

Click Make a New Submission for This Assignment and indicate that you agree to the

declaration. The script will then check whether your code compiles. You can make as

many resubmissions as you like.