How do I make a window in Java?

Need java help with JOptionPane dialog boxes?

• I got this far in my assignment but the next step is extremely confusing. My code is below. The next step is... Look through the source code for the Flora.java file. (the code below is Flora.java). 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. import java.io.*; import java.awt.*; import java.awt.event.*; 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) ) {

• Answer:

  This is a help forum btw and not a wholesale "post your homework and get it done for you" site. The documentation clearly indicates this isn't your code and is stub for your assignment. If you have a question, ask and we'll do our best to help you.