Computer Programming - Coursework Example

Computer Programming Assignment [Insert [Insert Grade [Insert Introduction Computer programming is art of developing computer software. The aim of programming is to create instructions that computers will use in order to perform specific operations. This report will state how the program was developed to help the Chinese packing company use an order system to streamline orders from their user. System Requirements While making an order, the system should allow the user to specify the following requirements: a) The size of the container (length, height, width and/or radius). b) The grade of the card. c) Colouring required; no colouring, one or two colours. d) Whether they need any reinforcement at the bottom. e) Whether the container should have a sealable top. f) Quantity ordered for each type of container. The system should also compute the cost of the request ordered and display it to the user. Allow the user to place the order. It should also confirm to the intended user that the order will be met. System Design The system will make use of the following Object Oriented (OO) design approaches: a) Inheritance b) Encapsulation c) Polymorphism and d) Unified Modelling Language (UML) Use Case, Classes and Instance diagrams. Unified Modelling Language (UML) Diagrams. i. Use case diagram for the Ordering System. USER OBJECT ATTRIBUTES The system makes use of only one class OrderMenu. Line 12 uses “extends” keyword to indicate that the class inherits from Jpanel. Class OrderMenu is an enhanced type of Jpanel. Thus class OrderMenu is a sub class of a super class Jpanel. The “implements” keyword is used by a concrete class to indicate that it implements the interface and that each method in the interface is declared with the signature specified in the interface declaration. Note that we use an interface class instead of an abstract class since there is no default implementation to inherit as would be in abstract classes. It is also noteworthy that an interface class must be declared in a file with the same name and a .java file-name extension. Lines 60-250 declare a class OrderMenu constructor. The constructor takes no parameters hence the empty parenthesis. The class OrderMenu inherits from the following classes of package java.awt imported in the imports section: i. Class Component- A subclass of object that declares many of the attributes and behaviours common to the GUI components in the package. ii. Class Container- A subclass of component. It is used to organize and display components attached to it on the screen. iii. Class JComponent- A subclass of container. From this class we are then able to derive the rest of the components in the class including JButton, JCheckbox, and JTextfield etc. Class Hierarchy Diagram Events (methods) through which the user interacts with the system include: a) Select type of grade() b) Select quantity() c) Select colour() d) Select reinforcement() e) Select sealable() f) Enter height() g) Enter width() h) Enter length() The system responds to the user by doing the following: a) Compute cost() b) Confirm order() c) Display cost() Properties possessed by the objects include: a) Colour b) Height c) Breathe d) Length e) Surface area f) Reinforced g) Sealable Methods associated to the objects include: a) setColour() getColour() b) setHeight() getHeight() c) setBreathe() getBreathe () d) setLength() getLength() e) setSurfaceArea() getSurfaceArea f) setReinforced() getReinforced() g) setSealable() getSealable() Class diagram Class OrderMenu setColour() getColour() setHeight() getHeight() setBreathe() getBreathe() setLength() getLength() setSurfaceArea() getSurfaceArea setReinforced() getReinforced() setSealable() getSealable() ordermenu() +displayColour(colour) +diplayHeight() : double +displayBreath() : double +disLenght() : double +displaySurfaceArea() : double +displayReinforced() : Boolean +displaySealable() : Boolean Testing and evaluation The following are captured screen shots used to show how the system was tested and evaluated: Fig 1. Welcome screen Fig 2. Main Order Form. Possible input errors. Should the user click on the calculate price button before selecting the type of container and its dimensions, the system displays an error message as shown below. Should the user insert an invalid number or even a letter instead of a number, the calculate price button gives a null or a zero for the result as shown below. Should the user fail to select anything in the special features panel that is reinforced or sealable top, the default is, it is assumed that the container is not reinforced or can’t have a sealable top as appropriate. Assumptions: i. The user will only enter the exact dimensions of the desired container and that these dimensions will be within the range that the company can make. That is there is no way of checking whether the ordered dimensions can actually be met. ii. The user will intuitively know how to use the system. That is there is no help menu included in the system. Limitations: i. The colour option is not incorporated in the costing. ii. You can only choose to have one colour. iii. Once the user clicks the container button, they can’t cancel the process. They have to enter the dimensions and click reset later. iv. Should the user desire to reset after having made several entries, all the entries are reset. That is you can’t undo a particular entry. Appendixes Source code. package boxtubes; import java.awt.event.*; import java.awt.*; import java.io.*; import java.util.*; import java.text.*; import javax.swing.*; import javax.swing.border.*; class ordermenu extends JFrame implements ActionListener { JButton jbtRec;// Rectangular shaped JButton jbtCirc;//Circular shaped JButton jbtTri;//Triangular shaped JButton jbtReinforced,jbtSealable; JButton jbBack,jbconfirmorder; JButton jbtPrice, jbtReset, jbtMore; JRadioButton jrbNoColor, jrb1Color, jrb2Color, jrbGrade1, jrbGrade2, jrbGrade3; JTextField jtfItem,jtfitems, jtfPrice, jtfSub, jtfRein, jtfSeal, jtf1Co, jtf2Co, jtfTax, jtfTotal; JComboBox jcbquantity, jcbRein, jcbSeal, jcbColor; JTextArea jtasummary,jtaItems; String[] items = new String[50]; double[] cost = new double[50]; double[] quantity = new double[50]; double[] price2 = new double[50]; int x=0, y=0, z=0; double subtotal=0, area=0, reinfcd=0, sealable=0, total=0, price=0, x1, x2, x3, a, b, c; String sizeConvert=""; DecimalFormat df=new DecimalFormat("0.00"); //Main method public static void main(String[] args){ ordermenu frame = new ordermenu(); frame.pack(); frame.setTitle("Ordering System"); frame.setSize(800, 550); frame.setVisible(true); frame.setResizable(false); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setLocationRelativeTo(null); } //Constructor public ordermenu(){ Container cont = getContentPane(); cont.setLayout(new GridLayout(3,1)); JPanel p01 = new JPanel(new GridLayout(2,2)); JPanel p001 = new JPanel(new GridLayout(1,3,1,1)); p001.add(jbtRec = new JButton("RECTANGULAR")); p001.add(jbtTri = new JButton("TRIANGULAR")); p001.add(jbtCirc = new JButton("CIRCULAR")); p001.setBackground(Color.LIGHT_GRAY); TitledBorder centerBorderMD = BorderFactory.createTitledBorder("SELECT DESIRED SHAPE HERE"); centerBorderMD.setTitleJustification(TitledBorder.CENTER); p001.setBorder(centerBorderMD); p01.add(p001); JPanel p0001 = new JPanel(new GridLayout(2,1,1,1)); p0001.add(jcbRein = new JComboBox(new Object[]{"REINFORCED","YES","NO"})); jcbRein.setToolTipText("Choose whether a reinforced container"); p0001.add(jcbSeal = new JComboBox(new Object[]{"SEALABLE TOP","YES","NO"})); jcbSeal.setToolTipText("Choose whether a sealable container"); p0001.setBackground(Color.LIGHT_GRAY); TitledBorder centerBorderSpecial = BorderFactory.createTitledBorder("SPECIAL FEATURES"); centerBorderSpecial.setTitleJustification(TitledBorder.CENTER); p0001.setBorder(centerBorderSpecial); p01.add(p0001); //----------------------------------------------------------------------------------------------------------- JPanel p010=new JPanel(new GridLayout(2,2,1,1)); p010.add(new JLabel("Choose colour : ")); p010.add(jcbColor = new JComboBox(new Object[]{"Red","Blue","Yellow","Green","Brown"})); jcbColor.setToolTipText("Select The Desired Colour"); //----------------------------------------------------------------------------------------------------------- JPanel p011=new JPanel(new GridLayout(2,3,1,1)); p011.add(new JLabel("Item : ")); p011.add(jtfItem = new JTextField(10));//item try catch p011.add(new JLabel("")); p011.add(new JLabel("Quantity :")); p011.add(jcbquantity = new JComboBox(new Object[]{"1","2","3","4","5","6","7","8","9","10"})); jcbquantity.setToolTipText("Select Your Quantity"); p011.add(new JLabel("")); jtfItem.setEditable(false); p011.setBorder(new TitledBorder("")); p011.setBackground(Color.LIGHT_GRAY); JPanel p012=new JPanel(new GridLayout(1,3,20,20)); p012.setBackground(Color.LIGHT_GRAY); p012.add(jrbGrade1 = new JRadioButton("Grade 1")); jrbGrade1.setBackground(Color.LIGHT_GRAY); p012.add(jrbGrade2 = new JRadioButton("Grade 2")); jrbGrade2.setBackground(Color.LIGHT_GRAY); p012.add(jrbGrade3 = new JRadioButton("Grade 3")); jrbGrade3.setBackground(Color.LIGHT_GRAY); p012.setBorder(new TitledBorder("Grade Required")); p012.setBackground(Color.LIGHT_GRAY); //Set default size jrbGrade3.setSelected(true); ButtonGroup group = new ButtonGroup(); group.add(jrbGrade1); group.add(jrbGrade2); group.add(jrbGrade3); JPanel p013=new JPanel(new GridLayout(2,1)); p013.setBackground(Color.LIGHT_GRAY); p013.add(p012); p013.add(p011); JPanel p014=new JPanel(new GridLayout(2,1)); p014.add(p013); p014.add(p010); JPanel p015=new JPanel(new GridLayout(1,2)); p015.add(p01); p015.add(p014); cont.add(p015); //--------------------------------------------------------------------------------------- JPanel p02 = new JPanel(new GridLayout(4,3,3,3)); p02.add(new JLabel("")); p02.add(new JLabel("")); p02.add(new JLabel("")); p02.add(new JLabel("")); p02.add(jbtMore = new JButton("Add More")); jbtMore.setToolTipText("Add More Containers"); p02.add(new JLabel("")); p02.add(new JLabel("")); p02.add(jbtReset = new JButton("Reset")); p02.add(new JLabel("")); p02.add(new JLabel("")); jbtReset.setToolTipText("Clear All Enterences"); p02.setBackground(Color.LIGHT_GRAY); JPanel PA=new JPanel(new GridLayout(2,1));//new BorderLayout(5,5) PA.add(p02,BorderLayout.CENTER); JPanel p021 = new JPanel(new GridLayout(8,3)); p021.add(jbtPrice = new JButton("Calculate Price $")); jbtPrice.setToolTipText("View Price Order"); p021.add(jtfPrice = new JTextField(4)); jtfPrice.setEditable(false);//User cannot edit content p021.add(new JLabel("")); p021.add(new JLabel("SubTotal $")); p021.add(jtfSub = new JTextField(8)); p021.add(new JLabel("")); jtfSub.setEditable(false); p021.add(new JLabel("Reinforced $")); p021.add(jtfRein = new JTextField(8)); p021.add(new JLabel("")); jtfRein.setEditable(false); p021.add(new JLabel("Sealable $")); p021.add(jtfSeal = new JTextField(8)); p021.add(new JLabel("")); jtfSeal.setEditable(false); p021.add(new JLabel("One Colour $")); p021.add(jtf1Co = new JTextField(8)); p021.add(new JLabel("")); jtf1Co.setEditable(false); p021.add(new JLabel("Two Colors $")); p021.add(jtf2Co = new JTextField(8)); p021.add(new JLabel("")); jtf2Co.setEditable(false); p021.add(new JLabel("Total $")); p021.add(jtfTotal = new JTextField(8)); p021.add(new JLabel("")); p021.add(new JLabel("")); p021.add(new JLabel("")); p021.add(new JLabel("")); jtfTotal.setEditable(false); p021.setBorder(new TitledBorder("Price Detail")); p021.setBackground(Color.LIGHT_GRAY); JPanel p03=new JPanel(new GridLayout(1,1,20,20));; JPanel p2=new JPanel(new GridLayout(1,2)); p2.add(PA); p2.add(p03); cont.add(p2); p03.add(jtasummary = new JTextArea(10,10)); JScrollPane ScrollPaneSummary=new JScrollPane(jtasummary); p03.add(ScrollPaneSummary); jtasummary.setEditable(false); jtasummary.setToolTipText("Summary Order Details"); TitledBorder centerBorderSummary = BorderFactory.createTitledBorder("Order Detail"); centerBorderSummary.setTitleJustification(TitledBorder.CENTER); p03.setBorder(centerBorderSummary); p03.setBackground(Color.GRAY); JPanel p031=new JPanel(new FlowLayout(FlowLayout.CENTER)); p031.add(jbBack = new JButton("Back Main Page"));//2nd row jbBack.setToolTipText("Back to main Menu"); p031.add(jbconfirmorder=new JButton("Confirm Order"));//2nd row jbconfirmorder.setToolTipText("Confirm Your Order & Submit"); JPanel p3=new JPanel(new BorderLayout(5,5)); p3.add(p021); p3.add(p031,BorderLayout.SOUTH); cont.add(p3); jbBack.addActionListener(this); jbconfirmorder.addActionListener(this); jbtRec.addActionListener(this); jbtCirc.addActionListener(this); jbtTri.addActionListener(this); jcbRein.addActionListener(this); jcbSeal.addActionListener(this); jrbGrade1.addActionListener(this); jrbGrade2.addActionListener(this); jrbGrade3.addActionListener(this); jbtPrice.addActionListener(this); jcbquantity.addActionListener(this); jbtMore.addActionListener(this); jbtReset.addActionListener(this); } public void actionPerformed(ActionEvent e){ if (e.getSource() == jbtReset){ //Cancel jtfItem.setText(""); x=0;y=0;z=0; jcbquantity.setSelectedIndex(0); jcbRein.setSelectedIndex(-1); jcbSeal.setSelectedIndex(-1); jtfPrice.setText(null); jtfSub.setText(null); jtfTotal.setText(null); jtasummary.setText(null); subtotal=0; sealable=0; reinfcd=0; total=0; price=0; } if (e.getSource() == jbBack){//Back mainmenu frame = new mainmenu(); frame.setTitle("MAIN "); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setSize(500,500); frame.setVisible(true); frame.setResizable(true); frame.setLocationRelativeTo(null); this.dispose(); } //More if user want to add more item if(e.getSource()==jbtMore){ jcbquantity.setSelectedIndex(0); jtfPrice.setText(""); jtfItem.setText(""); } if (e.getSource() == jbtRec){ jtfItem.setText(("RECTANGULAR")); String a1 = JOptionPane.showInputDialog( "Enter the height" ); String b1 = JOptionPane.showInputDialog( "Enter the length" ); String c1 = JOptionPane.showInputDialog( "Enter the width" ); a = Double.parseDouble((String)a1); b = Double.parseDouble((String)b1); c = Double.parseDouble((String)c1); area = 2 * a * b + 2 * a * c + 2 * b * c ; items[x] = "Size of your box is :"+ df.format(area); cost[x] = area; } if (e.getSource() == jbtTri){ jtfItem.setText(("TRIANGULAR")); String a1 = JOptionPane.showInputDialog( "Enter the height" ); String b1 = JOptionPane.showInputDialog( "Enter the length" ); String c1 = JOptionPane.showInputDialog( "Enter the width" ); a = Double.parseDouble((String)a1); b = Double.parseDouble((String)b1); c = Double.parseDouble((String)c1); area = a * b + a * c + b * c + Math.sqrt(a * a + b * b) * c ; items[x] = "Size of your box is :"+df.format(area); cost[x] = area; } if (e.getSource() == jbtCirc){ jtfItem.setText(("CIRCULAR")); String b1 = JOptionPane.showInputDialog( "Enter the radius" ); String c1 = JOptionPane.showInputDialog( "Enter the height" ); b = Double.parseDouble((String)b1); c = Double.parseDouble((String)c1); area = 6.34 * b * b + 6.34 * b * c; items[x] = "Size of your box is :"+df.format(area); cost[x] = area; } //To display the price for selected item if (e.getSource() == jbtPrice){ if(jtfItem.getText().equalsIgnoreCase("") ){ jtfItem.requestFocus(); jtfPrice.setText(null); jtfSub.setText(null); jtfTotal.setText(null); jtasummary.setText(null); subtotal=0; total=0; price=0; JOptionPane.showMessageDialog(null,"Error, Please Enter Item First");//edit } else{ int r = jcbRein.getSelectedIndex(); int s = jcbSeal.getSelectedIndex(); if (r == 1 && s == 1){ calculateprice(); while(z Read More