http://www.daniweb.com – I am having a small bit of trouble with a certain program. Here's the program requires. The program developed in Chapter 8 sent data to an external, sequential data named payment11192007 (or payment plus the system date for your computer). It opened a connection to the DataOutputStream and used the writeUTF() methods to transfer data to the disk. Write a new program named PaymentReader to read the data into a Swing interface that displays each record. Ok, so here is the first code that contains the program for chapter 8. /* Chapter 8 BillPayer Power & Light Programmer: ????????? Date: March 3, 2010 Program Name: Bill Payer */ import java.io.*; import java.awt.*; import java.awt.event.*; import javax.swing.*; import java.text.*; import java.util.*; public class BillPayer extends JFrame implements ActionListener { //Declare output stream DataOutputStream output; //Construct a panel for each row JPanel firstRow = new JPanel(); JPanel secondRow = new JPanel(); JPanel thirdRow = new JPanel(); JPanel forthRow = new JPanel(); JPanel fifthRow = new JPanel(); JPanel sixthRow = new JPanel(); JPanel seventhRow = new JPanel(); JPanel eigthRow = new JPanel(); //Construt a panel for the fields and buttons JPanel fieldPanel = new JPanel(); JPanel buttonPanel = new JPanel(); //Construct labels and text boxes JLabel acctNumLabel = new JLabel("Account Number: "); JTextField acctNum = new JTextField(15); JLabel pmtLabel = new JLabel("Payment Amount:"); JTextField pmt = new JTextField(10); JLabel firstNameLabel = new JLabel("First Name: "); JTextField firstName = new JTextField(10); JLabel lastNameLabel = new JLabel("Last Name:"); JTextField lastName = new JTextField(20); JLabel addressLabel = new JLabel("Address:"); JTextField address = new JTextField(35); JLabel cityLabel = new JLabel("City: "); JTextField city = new JTextField(10); JLabel stateLabel = new JLabel("State:"); JTextField state = new JTextField(2); JLabel zipLabel = new JLabel("Zip:"); JTextField zip = new JTextField(9); //Construct button JButton submitButton = new JButton("Submit"); public static void main(String[] args) { //set the look and feel of the interface try { UIManager.setLookAndFeel("com.sun.java.swing.plaf.motif.MotifLookAndFeel"); } catch(Exception e) { JOptionPane.showMessageDialog(null,"The UIManager could not set the Look and Feel for this application.","Error",JOptionPane.INFORMATION_MESSAGE); } BillPayer f = new BillPayer(); f.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE); f.setSize(450,300); f.setTitle("Crandall Power and Light Customer Payments"); f.setResizable(false); f.setLocation(200,200); f.setVisible(true); } public BillPayer() { Container c = getContentPane(); c.setLayout((new BorderLayout())); fieldPanel.setLayout(new GridLayout(8,1)); FlowLayout rowSetup = new FlowLayout(FlowLayout.LEFT,5,3); firstRow.setLayout(rowSetup); secondRow.setLayout(rowSetup); thirdRow.setLayout(rowSetup); forthRow.setLayout(rowSetup); fifthRow.setLayout(rowSetup); sixthRow.setLayout(rowSetup); seventhRow.setLayout(rowSetup); eigthRow.setLayout(rowSetup); buttonPanel.setLayout(new FlowLayout(FlowLayout.CENTER)); //Add Fields to rows firstRow.add(acctNumLabel); firstRow.add(pmtLabel); secondRow.add(acctNum); secondRow.add(pmt); thirdRow.add(firstNameLabel); thirdRow.add(lastNameLabel); forthRow.add(firstName); forthRow.add(lastName); fifthRow.add(addressLabel); sixthRow.add(address); seventhRow.add(cityLabel); seventhRow.add(stateLabel); seventhRow.add(zipLabel); eigthRow.add(city); eigthRow.add(state); eigthRow.add(zip); //Add rows to panel fieldPanel.add(firstRow); fieldPanel.add(secondRow); fieldPanel.add(thirdRow); fieldPanel.add(forthRow); fieldPanel.add(fifthRow); fieldPanel.add(sixthRow); fieldPanel.add(seventhRow); fieldPanel.add(eigthRow); //Add button to panel buttonPanel.add(submitButton); //Add panels to frame c.add(fieldPanel, BorderLayout.CENTER); c.add(buttonPanel, BorderLayout.SOUTH); //Add functionality to buttons submitButton.addActionListener(this); //Get the current date and open the file Date today = new Date(); SimpleDateFormat myFormat = new SimpleDateFormat("MMddyyyy"); String filename = "payments" + myFormat.format(today); try { output = new DataOutputStream(new FileOutputStream(filename)); } catch(IOException io) { JOptionPane.showMessageDialog(null,"The program could not create a storage location. Please check the disk drive and then run the program again.","Error",JOptionPane.INFORMATION_MESSAGE); System.exit(1); } addWindowListener( new WindowAdapter() { public void windowClosing(WindowEvent e) { int answer = JOptionPane.showConfirmDialog(null,"Are you sure you want to submit the file?", "File Submisson", JOptionPane.YES_NO_OPTION); if(answer == JOptionPane.YES_OPTION); System.exit(0); } } ); } public void actionPerformed(ActionEvent e) { String arg = e.getActionCommand(); if(checkFields()) { try { output.writeUTF(acctNum.getText()); output.writeUTF(pmt.getText()); output.writeUTF(firstName.getText()); output.writeUTF(lastName.getText()); output.writeUTF(address.getText()); output.writeUTF(city.getText()); output.writeUTF(state.getText()); output.writeUTF(zip.getText()); JOptionPane.showMessageDialog(null,"The payment information has been saved.", "Submission Successful", JOptionPane.INFORMATION_MESSAGE); } catch(IOException c) { System.exit(1); } clearFields(); } } public boolean checkFields() { if ((acctNum.getText().compareTo("")<1) || (pmt.getText().compareTo("")<1) || (firstName.getText().compareTo("")<1) || (lastName.getText().compareTo("")<1) || (address.getText().compareTo("")<1) || (city.getText().compareTo("")<1) || (state.getText().compareTo("")<1) || (zip.getText().compareTo("")<1)) { JOptionPane.showMessageDialog(null,"You must complete all fields.","Data Entry Error",JOptionPane.WARNING_MESSAGE); return false; } else { return true; } } public void clearFields() { //Clear fields and reset the focus acctNum.setText(""); pmt.setText(""); firstName.setText(""); lastName.setText(""); address.setText(""); city.setText(""); state.setText(""); zip.setText(""); acctNum.requestFocus(); } } Now here is the code i'm writing (the one that needs to read the data). import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.text.*; import java.io.*; public class DataRead extends JFrame { //construct components JTextPane textPane = new JTextPane(); //create the content pane public Container createContentPane() { //create the JTextPanel and center panel JPanel centerPanel = new JPanel(); textPane = addTextToTextPane(); JScrollPane scrollPane = new JScrollPane(textPane); scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS); scrollPane.setPreferredSize(new Dimension(580, 580)); centerPanel.add(scrollPane); //create Container and set attributes Container c = getContentPane(); c.setLayout(new BorderLayout(1100,50)); c.add(centerPanel,BorderLayout.CENTER); return c; } //method to add new text to the JTextPane public JTextPane addTextToTextPane() { DataInputStream input; Document doc = textPane.getDocument(); try { input = new DataInputStream(new FileInputStream("11192007")); acctNum.setText(readUTF()); } catch(IOException e) { System.err.println("Couldn't insert text"); } return textPane; } //main method executes at run time public static void main(String args[]) { JFrame.setDefaultLookAndFeelDecorated(true); DataRead f = new DataRead(); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.setContentPane(f.createContentPane()); f.setSize(800,575); f.setVisible(true); } } Now, obvisouly it won't read the acctNum since it hasn't been identified. But for some odd reason, it won't read the readUTF method. It gives me this error: java:44: cannot find symbol symbol : method readUTF() location: class DataRead acctNum.setText(readUTF()); So, how am I suppose to actually make the program read data files using the readUTF method? Thanks for the help. (General)
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