Inventory program in Java

[r035198x]

Also, with the OP's code, how do you get your image to show? I tried to make a logo, but I don't see anything. What I did was I made an image and named it "dvd.gif" and put it in the same folder as the code. Is this the correct way to do that?

Alright Steve let's do this one step at a time. Were you able to display the products on a panel on the JFrame?

[stevedub]

Ok, I was able to get the OP's code to load properly. I have the same assignment due this Sunday. I think I may be to late to turn in the assignment from last week, the one that I gave the link to. So I guess I will try to work on the assignment for this week. Here is the link for this assingment.
https://ecampus.wintu.e du/afm101/secure/view-attachment.jspa ? ID=2016792&mess ageID=10060298& name=Week%208%2 0checkpoint%202 %20example.doc

[r035198x]

Ok, I was able to get the OP's code to load properly. I have the same assignment due this Sunday. I think I may be to late to turn in the assignment from last week, the one that I gave the link to. So I guess I will try to work on the assignment for this week. Here is the link for this assingment.
https://ecampus.wintu.e du/afm101/secure/view-attachment.jspa ? ID=2016792&mess ageID=10060298& name=Week%208%2 0checkpoint%202 %20example.doc

That link requires me to log in with details which I don't have. Just post the code for the stage you are at and tell us what the next step is.

[stevedub]

Here is the code:

import java.util.*;
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;

class Product implements Comparable {
 String itemName;	 // class variable that stores the item name
 double itemNumber;	 // class variable that stores the item number
 long stockQuantity; // class variable that stores the quantity in stock
 double price;	 // class variable that stores the item price

 public Product() {
  	 itemName = "";
	 itemNumber = 0.0;
	 stockQuantity = 0L;
	 price = 0.0;

 }
 public Product(String name, int number, long stockQuantity, double price) {
     this.itemName = name;
	 this.itemNumber = number;
	 this.stockQuantity = stockQuantity;
	 this.price = price;
	}
 public void setItemName(String name) {
  this.itemName = itemName;
 }
 public String getItemName() {
  return itemName;
 }
 public void setItemNumber(double number) {
  this.itemNumber = itemNumber;
 }
 public double getItemNumber() {
  return itemNumber;
 }
 public void setStockQuantity(long quantity) {
  stockQuantity = quantity;
 }
 public long getStockQuantity() {
  return stockQuantity;
 }
 public void setItemPrice(double price) {
  this.price = price;
 }
 public double getItemPrice() {
  return price;
 }
 public double calculateInventoryValue() {
  return getItemPrice() * getStockQuantity();
 }
 public int compareTo (Object o) {
  Product p = (Product)o;
  return itemName.compareTo(p.getItemName());
 }
 public String toString() {
  return "Title :"+getItemName() + "\nStock Number"+itemNumber+"\nPrice"+price+"\nQuantity"+stockQuantity + "\nValue :"+calculateInventoryValue();
 }

}

class DVD extends Product implements Comparable {
private String rating;
public DVD() {
super(); //Call the constructor in Product
rating = ""; //Add the additonal attribute
}
public DVD(String itemName, int itemNumber, long stockQuantity, double price, String rating) {
super(itemName, itemNumber, stockQuantity, price); //Call the constructor in Product
this.rating = rating; //Add the additonal attribute
	}
public void setRating(String rating) {
this.rating = rating;
}
public String getRating() {
return rating;
}
public double calculateInventoryValue() {
return getItemPrice() * getStockQuantity() + getItemPrice()*getStockQuantity()*0.05; //Had you forgotten to include the restocking fee?
}
//What happens when we want to change the restocking fee?
public double calculateRestockFee() {
return getItemPrice() * 0.05;
}
public int compareTo (Object o) {
Product p = (Product)o;
return getItemName().compareTo(p.getItemName());
}
public String toString() {
return "Name :"+getItemName() + "\nNumber"+getItemNumber()+"\nPrice"+getItemPrice()+"\nQuantity"+getStockQuantity() +"\nRating :"+getRating()+"\nValue"+calculateInventoryValue();
}
}

[stevedub]

import java.util.*;
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;

public class Inventory1 extends JFrame implements ActionListener {
//Utility class for displaying the picture
//If we are going to use a class/method/variable inside that class only, we declare it private in that class
private class MyPanel extends JPanel {
	ImageIcon image = new ImageIcon("dvd.gif");
	int width = image.getIconWidth();
	int height = image.getIconHeight();
	long angle = 30;
	public MyPanel(){
	 super();
	}
	public void paintComponent(Graphics g){
	 super.paintComponent(g);
	 Graphics2D g2d = (Graphics2D)g;
	 //g2d.rotate (Math.toRadians(angle), 60+width/2, 60+height/2);
	 g2d.drawImage(image.getImage(), 60, 60, this);
	 g2d.dispose();
	}
}//end class MyPanel

int currentIndex; //Currently displayed Item
Product[] supplies = new Product[4];
JLabel itemName ;
JLabel itemNumber;
JLabel rating;
JLabel quantity;
JLabel price;
JLabel fee;
JLabel totalValue;
JTextField itemNameField = new JTextField(20);
JTextField itemNumberField = new JTextField(20);
JTextField ratingField = new JTextField(20);
JTextField quantityField = new JTextField(20);
JTextField priceField = new JTextField(20);

JPanel display;
JPanel displayHolder;
JPanel panel;
public Inventory1() {
makeTheDataItems();
setSize(600, 500);
setTitle("DVD Inventory Program");
//make the panels
display = new JPanel();
JPanel other = new JPanel();
JPanel picture = new MyPanel();
JPanel buttons = new JPanel();
JPanel centerPanel = new JPanel();
displayHolder = new JPanel();
display.setLayout(new GridLayout(5, 3));
other.setLayout(new GridLayout(2, 1));
//make the labels
itemName = new	 JLabel("Name       :");
itemNumber = new	 JLabel("Number       :");
rating = new	 JLabel("Rating      :");
quantity = new JLabel("Quantity       :");
price = new	 JLabel("Price       :");
fee = new		JLabel("Fee       :");
totalValue = new JLabel("Total Value       :");
//Use the utility method to make the buttons
JButton first = makeButton("First");
JButton next = makeButton("Next");
JButton previous = makeButton("Previous");
JButton last = makeButton("Last");
JButton exit = makeButton("Exit");
//Other buttons
JButton add = makeButton("Add");

//Add the labels to the display panel
display.add(itemName);
display.add(itemNumber);
display.add(rating);
display.add(quantity);
display.add(price);
display.add(fee);
//add the buttons to the buttonPanel
buttons.add(first);
buttons.add(previous);
buttons.add(next);
buttons.add(last);
buttons.add(exit);
//Add the picture panel and display to the centerPanel
displayHolder.add(display);
centerPanel.setLayout(new GridLayout(2, 1));
centerPanel.add(picture);
centerPanel.add(displayHolder);
other.add(buttons);
JPanel forAdd = new JPanel(); // add the other buttons to this panel
forAdd.add(add);
other.add(forAdd);

//Add the panels to the frame
getContentPane().add(centerPanel, "Center");
getContentPane().add(other, "South");
this.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
setVisible(true);
}
private void makeTheDataItems () {
  Product p1 = new DVDTitle("Beerfest", 001, 200, 12.99, "R");
  Product p2 = new DVDTitle("The Illusionist", 002, 50, 9.95, "PG-13");
  Product p3 = new DVDTitle("Employee of the Month  ", 003, 100, 19.95, "R");
  Product p4 = new DVDTitle("Pirates of the Caribbean 2  ", 004, 75, 9.99, "PG-13");

  supplies[0] = p1;
  supplies[1] = p2;
  supplies[2] = p3;
  supplies[3] = p4;
}
//Utility method for creating and dressing buttons
private JButton makeButton(String label) {
JButton button = new JButton(label);
button.setActionCommand(label);
button.addActionListener(this);
return button;
}
private void addItem() {
System.out.println("eeeeeeeeee");
panel = new JPanel();
JPanel add = new JPanel();
add.setLayout(new GridLayout(2, 1));
add.setLayout(new GridLayout(4, 4));
JButton addIt = makeButton("Add Item");
JLabel itemName = new JLabel("Name       :");
//JLabel itemNumber = new JLabel("Number       :");
JLabel rating = new JLabel("Rating       :");
JLabel quantity = new JLabel("Quantity	:");
JLabel price = new JLabel("Price	 :");
add.add(itemName); add.add(itemNameField);
//add.add(itemNumber); add.add(itemNumberField);
add.add(rating); add.add(ratingField);
add.add(quantity); add.add(quantityField);
add.add(price); add.add(priceField);
panel.add(add);
JPanel forAddIt = new JPanel();
forAddIt.add(addIt);
panel.add(forAddIt);
displayHolder.remove(display);
displayHolder.add(panel);
//display = panel;
this.setVisible(true);
}

public static void main( String args[]) {
Inventory1 object = new Inventory1(); //The main method should not have too much code
} // end main method
public void actionPerformed(ActionEvent event) {
String command = event.getActionCommand(); //This retrieves the command that we set for the button
//Always compare strings using the .equals method and not using ==
if(command.equals("First")) {
displayFirst();
}
else if(command.equals("Next")) {
displayNext();
}
else if(command.equals("Previous")) {
displayPrevious();
}
else if(command.equals("Last")) {
displayLast();
}
else if(command.equals("Exit")) {
this.dispose();
System.exit(0);
}
else if(command.equals("Add")) {
addItem();
}
else if(command.equals("Add Item")) {
addItemToArray();
}

}
private void addItemToArray() {
Product p = new DVDTitle(itemNameField.getText(), supplies.length -2, Long.parseLong(quantityField.getText()),
Double.parseDouble(priceField.getText()), ratingField.getText());
//Extend size of array by one first
Product[] ps = new Product[supplies.length + 1];
for(int i = 0; i < ps.length-1; i++) {
ps[i] = supplies[i];
}
ps[supplies.length] = p;
supplies = ps;
displayHolder.remove(panel);
displayHolder.add(display);
displayLast();
this.setVisible(false);
this.setVisible(true);
}
//Utility method to ease the typing and reuse code
//This method reduces the number of lines of our code
private void displayItemAt(int index) {
DVDTitle product = (DVDTitle)supplies[index];
itemName.setText("Item Name: "+ product.getItemName());
itemNumber.setText("Item Number: "+ product.getItemNumber());
rating.setText("Rating: "+ product.getRating());
quantity.setText("Quantity In Stock: "+ product.getStockQuantity());
price.setText("Item Price: "+ product.getItemPrice());
totalValue.setText("Total: " + product.calculateInventoryValue());
fee.setText("Fee :"+product.calculateRestockFee());
this.setVisible(true);
}
public void displayFirst() {
displayItemAt(0);
currentIndex = 0;
}
public void displayNext() {
if(currentIndex == supplies.length-1) {
displayFirst();
currentIndex = 0;
}
else {
displayItemAt(currentIndex + 1);
currentIndex++;
}
}
public void displayPrevious() {
if(currentIndex == 0) {
displayLast();
currentIndex = supplies.length-1;
}
else {
displayItemAt(currentIndex - 1);
currentIndex--;
}
}
public void displayLast() {
displayItemAt(supplies.length-1);
currentIndex = supplies.length-1;
}
}//end class Inventory2.1

I need to display a company logo, this is where I am having trouble

[r035198x]

 

import java.util.*;
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;

class Product implements Comparable {
 String name;
 double number;
 long stockQuantity;
 double price;

 public Product() {
  name = "";
	 number = 0.0;
	 stockQuantity = 0L;
	 price = 0.0;

 }
 public Product(String name, int number, long stockQuantity, double price) {
  this.name = name;
	 this.number = number;
	 this.stockQuantity = stockQuantity;
	 this.price = price;
	}
	public void setItemName(String name) {
  this.name = name;
 }
 public String getItemName() {
  return name;
 }
 public void setItemNumber(double number) {
  this.number = number;
 }
 public double getItemNumber() {
  return number;
 }
 public void setStockQuantity(long quantity) {
  stockQuantity = quantity;
 }
 public long getStockQuantity() {
  return stockQuantity;
 }
 public void setItemPrice(double price) {
  this.price = price;
 }
 public double getItemPrice() {
  return price;
 }
 public double calculateInventoryValue() {
  return getItemPrice() * getStockQuantity();
 }
 public int compareTo (Object o) {
  Product p = (Product)o;
  return name.compareTo(p.getItemName());
 }
 public String toString() {
  return "Name :"+getItemName() + "\nNumber"+number+"\nPrice"+price+"\nQuantity"+stockQuantity + "\nValue :"+calculateInventoryValue();
 }

} 

 

class DVD extends Product implements Comparable {
 private String title;
 public DVD() {
  super(); //Call the constructor in Product
  title = ""; //Add the additonal attribute
 }
 public DVD(String name, int number, long stockQuantity, double price, String title) {
  super(name, number, stockQuantity, price); //Call the constructor in Product
  this.title = title; //Add the additonal attribute
	}
	public void setTitle(String title) {
  this.title = title;
 }
 public String getTitle() {
  return title;
 }
 public double calculateInventoryValue() {
  return getItemPrice() * getStockQuantity() + getItemPrice()*getStockQuantity()*0.05;
 }

 public double calculateRestockFee() {
  return getItemPrice() * 0.05;
 }
 public int compareTo (Object o) {
  Product p = (Product)o;
  return getItemName().compareTo(p.getItemName());
 }
 public String toString() {
  return "Name :"+getItemName() + "\nNumber"+getItemNumber()+"\nPrice"+getItemPrice()+"\nQuantity"+getStockQuantity() +"\nTitle :"+getTitle()+"\nValue"+calculateInventoryValue();
 }
}

public class Inventory2 extends JFrame implements ActionListener {

 //Utility class for displaying the picture
 //If we are going to use a class/method/variable inside that class only, we declare it private in that class
 private class MyPanel extends JPanel {
	ImageIcon image = new ImageIcon("Sample.jpg");
	int  width  = image.getIconWidth();
	int  height  = image.getIconHeight();
	long angle = 30;

	public MyPanel(){
	 super();
	}
	public void paintComponent(Graphics g){
	   super.paintComponent(g);
	   Graphics2D g2d = (Graphics2D)g;
	   g2d.rotate (Math.toRadians(angle), 60+width/2, 60+height/2);
	   g2d.drawImage(image.getImage(), 60, 60, this);
	   g2d.dispose();
	}
 }//end class MyPanel


 int currentIndex; //Currently displayed Item
 Product[] supplies = new Product[4];
 JLabel name ;
 JLabel number;
 JLabel title;
 JLabel quantity;
 JLabel price;
 JLabel fee;
 JLabel totalValue;

 JTextField nameField = new JTextField(20);
 JTextField numberField = new JTextField(20);
 JTextField titleField = new JTextField(20);
 JTextField quantityField = new JTextField(20);
 JTextField priceField = new JTextField(20);


 JPanel display;
 JPanel displayHolder;
 JPanel panel;
 public Inventory2() {
  makeTheDataItems();

  setSize(500, 500);
  setTitle("Inventory Program");
  //make the panels
  display = new JPanel();
  JPanel other = new JPanel();
  JPanel picture = new MyPanel();
  JPanel buttons = new JPanel();
  JPanel centerPanel = new JPanel();
  displayHolder = new JPanel();
  display.setLayout(new GridLayout(7, 1));
  //other.setLayout(new GridLayout(1, 1));

  //make the labels
  name = new	   JLabel("Name		:");
  number = new	 JLabel("Number	  :");
  title = new	  JLabel("Title	   :");
  quantity = new   JLabel("Quantity	:");
  price = new	  JLabel("Price	   :");
  fee = new		JLabel("Fee		 :");
  totalValue = new JLabel("Total Value :");

  //Use the utility method to make the buttons
  JButton first = makeButton("First");
  JButton next = makeButton("Next");
  JButton previous = makeButton("Previous");
  JButton last = makeButton("Last");
  JButton exit = makeButton("Exit");

  //Other buttons
  JButton add = makeButton("Add");


  //Add the labels to the display panel
  display.add(name);
  display.add(number);
  display.add(title);
  display.add(quantity);
  display.add(price);
  display.add(fee);

  //add the buttons to the buttonPanel
  buttons.add(first);
  buttons.add(previous);
  buttons.add(next);
  buttons.add(last);
  buttons.add(exit);

  //Add the picture panel and display to the centerPanel
  displayHolder.add(display);
  centerPanel.setLayout(new GridLayout(2, 1));
  centerPanel.add(picture);
  centerPanel.add(displayHolder);
  other.add(buttons);
  JPanel forAdd = new JPanel(); // add the other buttons to this panel
  forAdd.add(add);
  other.add(forAdd);


  //Add the panels to the frame

  getContentPane().add(centerPanel, "Center");
  getContentPane().add(other, "South");
  this.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
  setVisible(true);
 }

 private void makeTheDataItems () {
  Product p1 = new DVD("test", 001, 200, 100, "The one");
  Product p2 = new DVD("test", 002, 500, 10000, "test");
  Product p3 = new DVD("test", 003, 100, 3000, "test");
  Product p4 = new DVD("test", 100, 3000, 9000, "test");
  supplies[0] = p1;
  supplies[1] = p2;
  supplies[2] = p3;
  supplies[3] = p4;
 }

 //Utility method for creating and dressing buttons
 private JButton makeButton(String label) {
  JButton button = new JButton(label);
  button.setActionCommand(label);
  button.addActionListener(this);
  return button;
 }

 private void addItem() {
  panel = new JPanel();
  JPanel add = new JPanel();
  add.setLayout(new GridLayout(2, 1));
  add.setLayout(new GridLayout(4, 4));
  JButton addIt = makeButton("Add Item");

  JLabel name = new JLabel("Name		:");
  //JLabel number = new JLabel("Number	  :");
  JLabel title = new JLabel("Title	   :");
  JLabel quantity = new JLabel("Quantity	:");
  JLabel price = new JLabel("Price	   :");

  add.add(name); add.add(nameField);
  //add.add(number); add.add(numberField);
  add.add(title); add.add(titleField);
  add.add(quantity); add.add(quantityField);
  add.add(price); add.add(priceField);
  panel.add(add);
  JPanel forAddIt = new JPanel();
  forAddIt.add(addIt);
  panel.add(forAddIt);
  displayHolder.remove(display);
  displayHolder.add(panel);

  //display = panel;
  this.setVisible(true);
 }


 public static void main( String args[]) {
  Inventory2 object = new Inventory2(); //The main method should not have too much code
 } // end main method

 public void actionPerformed(ActionEvent event) {
  String command = event.getActionCommand(); //This retrieves the command that we set for the button
  //Always compare strings using the .equals method and not using ==
  if(command.equals("First")) {
   displayFirst();
  }
  else if(command.equals("Next")) {
   displayNext();
  }
  else if(command.equals("Previous")) {
   displayPrevious();
  }
  else if(command.equals("Last")) {
   displayLast();
  }
  else if(command.equals("Exit")) {
   this.dispose();
   System.exit(0);
  }
  else if(command.equals("Add")) {
   addItem();
  }
  else if(command.equals("Add Item")) {
   addItemToArray();
  }


 }

 private void addItemToArray() {
  Product p = new DVD(nameField.getText(), supplies.length -2, Long.parseLong(quantityField.getText()),
  Double.parseDouble(priceField.getText()), titleField.getText());
  //Extend size of array by one first
  Product[] ps = new Product[supplies.length + 1];
  for(int i = 0; i < ps.length-1; i++) {
   ps[i] = supplies[i];
  }
  ps[supplies.length] = p;
  supplies = ps;
  displayHolder.remove(panel);
  displayHolder.add(display);
  displayLast();
  this.setVisible(false);
  this.setVisible(true);

 }

 //Utility method to ease the typing and reuse code
 //This method reduces the number of lines of our code
 private void displayItemAt(int index) {
   MobilePhone product = (MobilePhone)supplies[index];
   name.setText("Item Name: "+ product.getItemName());
   number.setText("Item Number: "+ product.getItemNumber());
   title.setText("Title: "+ product.getBrand());
   quantity.setText("Quantity In Stock: "+ product.getStockQuantity());
   price.setText("Item Price: "+ product.getItemPrice());
   totalValue.setText("Total: " + product.calculateInventoryValue());
   fee.setText("Fee :"+product.calculateRestockFee());
   this.repaint();
   this.setVisible(true);
 }

 public void displayFirst() {
  displayItemAt(0);
  currentIndex = 0;
 }

 public void displayNext() {
  if(currentIndex == supplies.length-1) {
   displayFirst();
   currentIndex = 0;
  }
  else {
   displayItemAt(currentIndex + 1);
   currentIndex++;

  }
 }

 public void displayPrevious() {
  if(currentIndex == 0) {
   displayLast();
   currentIndex = supplies.length-1;
  }
  else {
   displayItemAt(currentIndex - 1);
   currentIndex--;
  }
 }

 public void displayLast() {
  displayItemAt(supplies.length-1);
  currentIndex = supplies.length-1;
 }

}//end class Inventory2

I've edited some code I already had which is not really fully functional yet (I hope you will be able to change that).

You should ask where you don't understand and point out where it differs from your requirements

[stevedub]

Ok, I am getting some errors when trying to compile the edited code. I noticed their was some code about a mobile phone in there too. I will try to sit down and go through it to see if I can see what's wrong.

Thanks again so much for all of your help, you don't know how much I appreciate it.

[r035198x]

Ok, I am getting some errors when trying to compile the edited code. I noticed their was some code about a mobile phone in there too. I will try to sit down and go through it to see if I can see what's wrong.

Thanks again so much for all of your help, you don't know how much I appreciate it.

It was initially used with DVD replaced by MobilePhone and was the last stage we reached on it. I simply removed the Mobile phone stuff and replaced it with DVD stuff. When I compiled it it was fine so if you get any compilation errors please post them and let's see if you are doing anything wrong.

[stevedub]

Ah cool, I got it to work. I just had to change a couple things around and it looks great. Now, all I need to do is display a company logo some how. Thanks again, you rock!

[stevedub]

I must have something set up wrong in the MyPanel part of the code, am I correct? I just need to figure out how to display the logo.

[r035198x]

I must have something set up wrong in the MyPanel part of the code, am I correct? I just need to figure out how to display the logo.

Put the image in the same folder as the code is in and change the name Sample.jpg in the MyPanel class to the name of your image.

[stevedub]

Ok, I changed the image name, but it is still not appearing. Do I need to edit the size in the code? I think I'm getting really close, just one thing is missing I think.

[stevedub]

Ah, I've got it finally. Something must not of saved right, it is now displaying. Thanks so much, I'm sure I'll be back here with the next step.

[stevedub]

Ok r035198x, it is time for my final assignment and I am way lost. I could really use your expertise if you have the time. Here is what the assignment is:

• Modify the Inventory Program to include an Add button, a Delete button, and a Modify button on the GUI. These buttons should allow the user to perform the corresponding actions on the item name, the number of units in stock, and the price of each unit. An item added to the inventory should have an item number one more than the previous last item.

• Add a Save button to the GUI that saves the inventory to a C:\data\invento ry.dat file.

• Use exception handling to create the directory and file if necessary.

• Add a search button to the GUI that allows the user to search for an item in the inventory by the product name. If the product is not found, the GUI should display an appropriate message. If the product is found, the GUI should display that product’s information in the GUI.

If you can help me at all I would greatly appreciate it. This class has proven to be too difficult for a beginner in Java, and it is definately not something that can be taught in 9 weeks.

[r035198x]

Ok r035198x, it is time for my final assignment and I am way lost. I could really use your expertise if you have the time. Here is what the assignment is:

• Modify the Inventory Program to include an Add button, a Delete button, and a Modify button on the GUI. These buttons should allow the user to perform the corresponding actions on the item name, the number of units in stock, and the price of each unit. An item added to the inventory should have an item number one more than the previous last item.

• Add a Save button to the GUI that saves the inventory to a C:\data\invento ry.dat file.

• Use exception handling to create the directory and file if necessary.

• Add a search button to the GUI that allows the user to search for an item in the inventory by the product name. If the product is not found, the GUI should display an appropriate message. If the product is found, the GUI should display that product’s information in the GUI.

If you can help me at all I would greatly appreciate it. This class has proven to be too difficult for a beginner in Java, and it is definately not something that can be taught in 9 weeks.

You will do well to understand every part of this assignment as it covers most of the core elementary concepts in Java. Now please post the current code you have now. It is now important to be able to have the interface showing right.