I am currently working on an assignment for my Java class. It requires us to change some code around in a file to add joptionpane dialog boxes in instead of the fields already there. The following is the exact wording of the assignment:
Look through the source code for the Flora. java file. Insert comment marks (//) at the beginning of all lines involving any of the message boxes, except for the MessageBox declaration statements. Directly underneath the lines that are commented out, insert new code to generate JOptionPane dialog boxes that replace the message boxes. Use the same titles, prompts, and buttons. Do not forget to import the necessary Swing packages.
I am having trouble figuring out how to add a JOptionPane box in. I imported the swing for the joptionpane but I need assistance setting it up for the boxes
import java.io.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.JOptionPane;
public class Flora extends Frame implements ActionListener
{
MessageBox savedBox;
MessageBox errorBox;
DataOutputStream output;
//Construct components
Panel dataFields = new Panel();
Panel firstRow = new Panel();
Panel secondRow = new Panel();
Panel thirdRow = new Panel();
Panel fourthRow = new Panel();
Panel fifthRow = new Panel();
Panel sixthRow = new Panel();
Panel buttonArea= new Panel();
Button newSticker = new Button("New Sticker");
Button renewal = new Button("Renewal");
//Label vinLabel = new Label("Enter Vehicle VIN number: ");
//TextField vin = new TextField(20);
//Label yearLabel = new Label("Year: ");
//TextField year = new TextField(4);
//Label makeLabel = new Label("Make: ");
//TextField make = new TextField(10);
//Label modelLabel = new Label("Model:");
//TextField model = new TextField(10);
//Label firstNameLabel = new Label("Enter First Name: ");
//TextField firstName = new TextField(15);
//Label lastNameLabel = new Label("Enter Last Name:");
//TextField lastName = new TextField(20);
//Label addressLabel = new Label("Enter Flora Address:");
//TextField address = new TextField (35);
public static void main(String[] args)
{
Flora window = new Flora();
window.setTitle("Flora City Stickers");
window.setSize(450, 250);
window.setVisible(true);
}
public Flora()
{
//Set background and layout managers
setBackground(Color.magenta);
setLayout(new BorderLayout());
dataFields.setLayout(new GridLayout(6,1));
FlowLayout rowSetup = new FlowLayout(FlowLayout.LEFT,5,2);
firstRow.setLayout(rowSetup);
secondRow.setLayout(rowSetup);
thirdRow.setLayout(rowSetup);
fourthRow.setLayout(rowSetup);
fifthRow.setLayout(rowSetup);
sixthRow.setLayout(rowSetup);
buttonArea.setLayout(new FlowLayout());
//Add fields to rows
firstRow.add(vinLabel);
firstRow.add(yearLabel);
firstRow.add(makeLabel);
firstRow.add(modelLabel);
secondRow.add(vin);
secondRow.add(year);
secondRow.add(make);
secondRow.add(model);
thirdRow.add(firstNameLabel);
thirdRow.add(lastNameLabel);
fourthRow.add(firstName);
fourthRow.add(lastName);
fifthRow.add(addressLabel);
sixthRow.add(address);
//Add rows to panel
dataFields.add(firstRow);
dataFields.add(secondRow);
dataFields.add(thirdRow);
dataFields.add(fourthRow);
dataFields.add(fifthRow);
dataFields.add(sixthRow);
//Add buttons to panel
buttonArea.add(newSticker);
buttonArea.add(renewal);
//Add panels to frame
add(dataFields, BorderLayout.NORTH);
add(buttonArea, BorderLayout.SOUTH);
//Add functionality to buttons
newSticker.addActionListener(this);
renewal.addActionListener(this);
//Open the file
try
{
output = new DataOutputStream(new FileOutputStream("Sticker.dat"));
}
catch(IOException c)
{
System.exit(1);
}
//Construct window listener
addWindowListener(
new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
}
);
}
public void actionPerformed(ActionEvent e)
{
String arg = e.getActionCommand();
String code;
if (arg == "New Sticker")
code = "N";
else
code = "R";
if (
(vin.getText().compareTo("")<1) ||
(year.getText().compareTo("")<1) ||
(make.getText().compareTo("")<1) ||
(model.getText().compareTo("")<1) ||
(firstName.getText().compareTo("")<1) ||
(lastName.getText().compareTo("")<1) ||
(address.getText().compareTo("")<1)
)
{
errorBox = new MessageBox(this, "Data Entry Error", "You must complete all fields.");
errorBox.setVisible(true);
}
else
{
try
{
output.writeUTF(code);
output.writeUTF(vin.getText());
output.writeUTF(year.getText());
output.writeUTF(make.getText());
output.writeUTF(model.getText());
output.writeUTF(firstName.getText());
output.writeUTF(lastName.getText());
output.writeUTF(address.getText());
savedBox = new MessageBox(this, "Data Submitted", "The vehicle information has been saved.");
savedBox.setVisible(true);
}
catch(IOException c)
{
System.exit(1);
}
clearFields();
}
}
public void clearFields()
{
//Clear fields and reset the focus
vin.setText("");
year.setText("");
make.setText("");
model.setText("");
firstName.setText("");
lastName.setText("");
address.setText("");
vin.requestFocus();
}
}
I know they want the original boxes commented out and I think I did that but I am not sure I have gotten everything. Thank you for any help you can provide.
The instructions state "Insert comment marks (//) at the beginning of all lines involving any of the message boxes, except for the MessageBox declaration statements". You've commented out all the Jlabels and JTextFields. I don't think that is part of the instruction.
You're looking for all the saveBox and errorBox EXCEPT the declarations MessageBox savedBox; MessageBox errorBox;
So all these are what you are looking to comment out.
savedBox = new MessageBox(this, "Data Submitted", "The vehicle information has been saved.");
saveBox.setVisible(true);
errorBox = new MessageBox(this, "Data Entry Error", "You must complete all fields.");
errorBox.setVisible(true);
And I believe you should replace them with a JOptionPane
JOptionPane.showInputDialog(null, "Data Entry Error", "You must complete all fields.");