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COIT11222 Programming Fundamentals Assignment - Central Queensland University, Australia

Develop a Windowed GUI Java Program to demonstrate you can use Java constructs including input/output via a GUI interface, Java primitive and built-in types, Java defined objects, arrays, selection and looping statements and various other Java commands. Your program must produce the correct results. Submit two source files: Order.java and RockyDryCleanersGUI.java.

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Answer - Order.java

public class Order {

private String customerName;

private int garments;

//default constructor

public Order()

{

customerName="";

garments=0;

}

//parameterised constructor

public Order(String name,int gar)

{

customerName=name;

garments=gar;

}

//set methods (mutators)

public void setCustomerName(String name){

customerName=name;

}

//setting garments

public void setGarments(int gar){

garments=gar;

}

//Two get methods (accessors)

//getting customer name

public String getCustomerName(){

return customerName;

}

//getting garments

public int getGarments(){

return garments;

}

/*CalculateCharge value returning method

* One to two garments: $8.50 per garment.

Three garments: $20.00.

More than three garments: $20.00 plus $6.50 per garment after that

* */

public double calculateCharge()

{

double charge=0;

if (garments ==1)

charge= 8.5;

else if (garments==2)

charge= 2*8.5;

else if( garments ==3)

charge = 20;

else if (garments>3)

{

int i=garments-3;

charge=20;

for( int j=0;j<i;j++)

{

charge +=6.5;

}

}

else

charge=0;

return charge;

}

}

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RockyDryCleanersGUI.java

import java.awt.FlowLayout;

import java.awt.Font;

import java.awt.event.ActionListener;

import java.awt.event.ActionEvent;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JButton;

import javax.swing.JTextField;

import javax.swing.JTextArea;

import javax.swing.JOptionPane;

import javax.swing.JScrollPane;

// TODO -- create Order class (separate file)

public class RockyDryCleanersGUI extends JFrame implements ActionListener

{             

private int MAX_ORDERS=10; // declare maximum orders constant

private Order [] orderArray = new Order[MAX_ORDERS];// declare Order object array

private int currentOrder = 0;// declare current order variable

private JLabel titleLabel = new JLabel("Rocky Dry Cleaners Management System"); // program title

private JLabel nameLabel = new JLabel("Customer name: ");// for prompt

private JTextField nameField = new JTextField(26); // for name entry

private JLabel garmentsLabel = new JLabel("Number of plain garments: ");// for prompt

private JTextField garmentsField = new JTextField(4); // for number of garments entry

private JTextArea displayTextArea = new JTextArea("", 16, 56); // declare text area

private JScrollPane scrollPane; // scroll pane for the text area

// declare all of the buttons

private JButton enterButton = new JButton("Enter"); // buttons

private JButton displayButton = new JButton("Display All");

private JButton searchButton = new JButton("Search");

private JButton exitButton = new JButton("Exit");

public RockyDryCleanersGUI()

{ // constructor create the Gui

this.setLayout(new FlowLayout()); // set JFrame to FlowLayout

titleLabel.setFont(new Font("Ariel", Font.BOLD, 22));

add(titleLabel);

add(nameLabel);

add(nameField);

add(garmentsLabel);

add(garmentsField);

// set text area to a monospaced font so the columns can be aligned using a format string

displayTextArea.setFont(new Font("Monospaced", Font.PLAIN, 12));

displayTextArea.setEditable(false); // make text area read only

scrollPane = new JScrollPane(displayTextArea); // add text area to the scroll pane

scrollPane.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER); // just need vertical scrolling

add(scrollPane);

add(enterButton);

add(displayButton);

add(searchButton);

add(exitButton);

enterButton.addActionListener(this); // add the action listener to the buttons

displayButton.addActionListener(this);

searchButton.addActionListener(this);

exitButton.addActionListener(this);

// when the user pushes the system close (X top right corner)

addWindowListener( // override window closing method

new WindowAdapter()

{

public void windowClosing(WindowEvent e)

{

exit(); // Attempt to exit application

}

}

);

}

public void actionPerformed(ActionEvent e)

{ // process the clicks on all of the buttons

String command = e.getActionCommand();

if (command.compareTo("Enter") == 0)

enter();

else if (command.compareTo("Display All") == 0)

displayAll();

else if (command.compareTo("Search") == 0)

search();

else if (command.compareTo("Exit") == 0)

exit();

}

private void enter()

{

//max order reached

if (currentOrder==10)

{

JOptionPane.showMessageDialog(this, "Maximum number of orders has been reached","Rocky Dry Cleaners Management System", JOptionPane.ERROR_MESSAGE);

nameField.setText("");

garmentsField.setText("");

nameField.requestFocus();

}

else if(nameField.getText().compareTo("") == 0) //when name filed is empty

{

JOptionPane.showMessageDialog(this, "You must enter a customer name", "Rocky Dry Cleaners Management System", JOptionPane.ERROR_MESSAGE);

nameField.requestFocus();

}

else if (garmentsField.getText().compareTo("") == 0) //when garments field is empty

{

JOptionPane.showMessageDialog(this, "You must enter number of garments ", "Rocky Dry Cleaners Management System", JOptionPane.ERROR_MESSAGE);

garmentsField.requestFocus();

}

else // when name and garments field are non empty

{

//Read in customer name and number of garments information and add to the Order array

String customerName = nameField.getText();

int garments = Integer.parseInt(garmentsField.getText());

orderArray[currentOrder] = new Order(customerName, garments);

currentOrder++;

displayHeading();

//Clear input fields and return focus to the customer name field and increment current booking variable

nameField.setText("");

garmentsField.setText("");

nameField.requestFocus();

//Display customer name, number of garments and the order charge to the text area

for(int i=0;i<currentOrder;i++)

{

displayTextArea.append(String.format("%-30s%-17s\t$%5.2f\n",orderArray[i].getCustomerName(),String.valueOf(orderArray[i].getGarments()),orderArray[i].calculateCharge()));

}

}

}

private void displayHeading()

{

displayTextArea.setText(String.format("%-30s%-17s%-6s\n", "Customer Name", "Garments", "Charge"));

appendLine();

}

private void appendLine()

{

displayTextArea.append("-------------------------------------------------------\n");

}

private void displayAll()

{

double totalcharge=0;

double avergarments=0;

if (currentOrder==0) //when no order

{

JOptionPane.showMessageDialog(this, "No order entered ", "Rocky Dry Cleaners Management System", JOptionPane.ERROR_MESSAGE);

displayTextArea.setText("");

}

else //display all of the entries entered so far

{

displayHeading();

for(int i=0;i<currentOrder;i++)

{

displayTextArea.append(String.format("%-30s%-17s\t$%5.2f\n",orderArray[i].getCustomerName(),String.valueOf(orderArray[i].getGarments()),orderArray[i].calculateCharge()));

totalcharge+=orderArray[i].calculateCharge();

avergarments+=orderArray[i].getGarments();

}

//display average garments per order and total charges collected

displayTextArea.append("------------------------------------------------------------\n");

displayTextArea.append(String.format("%-40s%5.2f\n","Average garments per order:",(avergarments/currentOrder)));

displayTextArea.append(String.format("%-40s\t$%5.2f\n","Total charges:",totalcharge));

}

}

private void search()

{

//read search key (customer name) from input dialog

String inp=JOptionPane.showInputDialog(this,"Enter a customer name to search","",JOptionPane.OK_OPTION);

int flag=0;

if (inp.compareTo("")==0) //when input search name is empty

{

JOptionPane.showMessageDialog(this, "You must enter a search name","Rocky Dry Cleaners Management System", JOptionPane.ERROR_MESSAGE);

}

else

{

//iterate through array to search for the search key

for(int i=0;i<currentOrder;i++)

{

if(inp.compareTo(orderArray[i].getCustomerName())==0) //when search successful

{

displayHeading();

displayTextArea.append(String.format("%-30s%-17s\t$%5.2f\n",orderArray[i].getCustomerName(),String.valueOf(orderArray[i].getGarments()),orderArray[i].calculateCharge()));

nameField.requestFocus();

flag=1;

break;

}

}

if (flag==0) //when search name not found in order array

{

JOptionPane.showMessageDialog(this, inp+" not found","Rocky Dry Cleaners Management System", JOptionPane.ERROR_MESSAGE);

}

}

}

private void exit()

{

// display exit message

JOptionPane.showMessageDialog(this, "Thank you for using Rocky Dry Cleaners Management System","Rocky Dry Cleaners Management System", JOptionPane.OK_OPTION);

System.exit(0);

} // exit

// Main method create instance of class

public static void main(String[] args)

{

RockyDryCleanersGUI f = new RockyDryCleanersGUI(); // Create instance of class

f.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE); // allow the code to close the program

f.setBounds(200, 100, 470, 440); // Define position and size of app

f.setTitle("Rocky Dry Cleaners Management System"); // Set the title of the app

f.setVisible(true); // Make the application visible

f.setResizable(false); // Make the window not resizable

} // main

}

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