CI228 CI228 Tutorials

Transcription

1 CI228 M A Smith University of Brighton September 13, 2016 Page 1

2 BIO - Basic Input Output Input of an integer number The static method BIO.getInt() will read from the keyboard an integer number typed by the user. This value must be assigned to a variable of type int. int idays = BIO.getInt(); //Whole number Will input into the variable idays an integer number typed by the user. A program in Java to input a number of days and calculate the number of weeks and days this represents. class Main { public static void main( String args[] ) { System.out.print( "#Input number of days " ); int idays = BIO.getInt(); System.out.print( idays ); System.out.print( " days is equal to " ); int weeks = idays / 7; System.out.print( weeks ); System.out.print( " week(s) " ); int days = idays % 7; System.out.print( days ); System.out.println( " day(s) " ); } } //Number of weeks //Remaining days #Input number of days days is equal to 1 week(s) 3 day(s) M A Smith University of Brighton September 13, 2016 Page 2

3 The Charon system will ignore any line in your output that contains a #. Hence you can output any line (containing a # ) and it will be ignored when Charon compares your answer with the expected answer. The class BIO is automatically included when you use BlueJ or submit a program to Charon. If you want to use this at home then you need to include the code for the class BIO (see programs on web site) in your program. M A Smith University of Brighton September 13, 2016 Page 3

4 Summary of BIO Static method call BIO.getInt() BIO.getDouble() BIO.getString() BIO.eof() Description Read a line and return as an int the number that is contained within the line. If the number is malformed then return 0. Read a line and return as a double the number that is contained within the line. If the number is malformed then return 0.0. Read a line and return as an instance of a String the characters that are contained within the line. Any leading or trailing white space characters will be preserved. Returns true if the end of the input has been reached otherwise false. If during a read operation an attempt is made to read past the end of input (EOF) normally a warning message will be printed and the program will terminate. M A Smith University of Brighton September 13, 2016 Page 4

5 Week #1 Tutorial Room Using an IDE This tutorial is all about completing exercise 1.1 & 1.2 using an IDE Integrated Development Environment. Preparation You need to work out on paper your Java solutions to coursework exercises 1.1 & 1.2. These exercises are to get you back into program construction as well as an introduction to the Charon system if you have not yet used this (Direct entrants) If you are a direct entrant to Level 5, then do ask for help, if you are unsure about any of this work. At the tutorial use an IDE to develop your programs before submitting the answer to the Charon system. The IDE Eclipse is more advanced than BlueJ and will give you many new features to manipulate your Java code. It would be good to become familiar with Eclipse during your study of CI228. Remember when using Eclipse, you will need to create a class Main for the program and a class BIO for the code of the Basic Input and Output methods. The code for BIO is available on line in the programs for week 1. M A Smith University of Brighton September 13, 2016 Page 5

6 Week #2 Tutorial Room If you are not sure about inheritance do ask at the tutorial. Start to look at what is required for exercise 1.3. Sketch out an outline on paper what the class AccountBetter1 will contain. When you implement an interface it is simply a promise to provide that method in the class together with its body that you have to write. The reason for using the interface Transfer is to guarantor that the class AccountBetter1 will provide an implementation for the methods transferfrom and transferto. AccountBetter1 extends Account implements transfer Try out your code for AccountBetter1 using the test program in the on-line notes. (Under programs at the end of the web page) M A Smith University of Brighton September 13, 2016 Page 6

7 Week #3 Tutorial Room This tutorial is all about exercises 1.3, 1.4 & 1.5 using an Integrated Development Environment. You should make sure that you are clear about inheritance and the use of interfaces in Java. Exercises 1.3 is an example of the use of inheritance and the use of an interface. Interfaces are covered in detail in lecture 3. Classes/ Interfaces that need to be used: Main Note the test program provided, writes out the result of calling methods in the class that you write. Charon will check that these are the correct result of calling these methods. Account AccountBetter1 Transfer (See c/w description for code) The class that you will create by inheriting from the class Account & implementing the methods in the interface Transfer, An interface that AccountBetter1 implements. (See c/w description for code) M A Smith University of Brighton September 13, 2016 Page 7

8 Exercises 1.4 is a example of the use of inheritance and the use of an interface. Classes/ Interfaces that need to be used: Main Note the test program provided, writes out the result of calling methods in the class that you write. Charon will check that these are the correct result of calling these methods. Account AccountBetter1 AccountBetter2 Transfer Interest (See c/w description for code) The class that you created by inheriting from the class Account in exercise 1.3 The class that you construct for this part of the coursework. This class inherits from the class AccountBetter1 that you created for exercise 2.1. An interface that AccountBetter1 implements. (See c/w description for code) An interface that AccountBetter2 implements. (See c/w description for code) M A Smith University of Brighton September 13, 2016 Page 8

9 Exercises 1.5 is an example of the use of overriding an existing method when inheriting. Classes/ Interfaces that need to be used: Main Note the test program provided, writes out the result of calling methods in the class that you write. Charon will check that these are the correct result of calling these methods. Account AccountBetter1 AccountBetter2 StudentAccount Transfer Interest (See c/w description for code) The class that you created by inheriting from the class Account. The class that you created by inheriting from the class AccountBetter1. The class that you construct for this part of the coursework. This class inherits from the class AccountBetter2 that you created for exercise 1.4 An interface that AccountBetter1 implements. (See c/w description for code) An interface that AccountBetter2 implements. (See c/w description for code) M A Smith University of Brighton September 13, 2016 Page 9

10 Week #4 Tutorial Room Sorting out those last problems with exercises 1.4 & 1.5 Making sure that you understand the description of the CatShop in this week 4's notes. Make sure that you can compile and run the CatShop system. Important you will need to set up the Derby DataBase. See the course notes for CI228 for how to do this. Make sure that you understand what is required for coursework 2.1 & 2.2. M A Smith University of Brighton September 13, 2016 Page 10

11 Week #5 Tutorial Room The Catalogue shop Working on exercise 2.1 and making sure that you understand how to incorporate BetterBasket into the Catshop system. Classes that you need for 2.1: Basket Product The code for this class in the CatShop system in the package catalogue. The code for this class in the CatShop system in the package catalogue. BetterBasket The class that you will create by inheriting from Basket. Put this in the package catalogue. The first line of the class should be: 'package catalogue'. Important The code for Basket, BetterBasket and Product show that they belong to the package catalogue. If you are testing your classes in isolation then you will need to take account of this in any testing. M A Smith University of Brighton September 13, 2016 Page 11

12 Week #6 Reading week / Catchup week A chance to catch up or read ahead. No tutorial this week. Information correct at time of printing. However, do check for any last minute changes. M A Smith University of Brighton September 13, 2016 Page 12

13 Week #7 Tutorial Room The Catalogue shop Completing exercise 2.1 Compleating your critique of your work. Thinking about the extension you will implement to the CatShop system. Discuss this with your tutor in the tutorial group. M A Smith University of Brighton September 13, 2016 Page 13

14 Week #8 Tutorial Room The Catalogue shop Working on your extension to the CatShop system. Working on your critique of your work. Prelimary reserach on your report. M A Smith University of Brighton September 13, 2016 Page 14

15 Week #9 Tutorial Room The Catalogue shop Planning your report. You may wish to run through your ideas with your tutor in the tutorial. M A Smith University of Brighton September 13, 2016 Page 15

16 Week #10 Tutorial Room The Catalogue shop Complete a draft of your report. You may wish to run through your ideas with your tutor in the tutorial. M A Smith University of Brighton September 13, 2016 Page 16

17 Week #11 Tutorial Room The Catalogue shop Resolving any issues with your coursework. Finishing the extension to the CatShop system. Final polishing of your report. M A Smith University of Brighton September 13, 2016 Page 17

18 Week #12 Tutorial Room Demonstration of the CatShop program M A Smith University of Brighton September 13, 2016 Page 18