Help with RandomAccessFile and arabic writing with it

hello every one am trying to write an arabic text to a file using RandomAccessFile i know how to do it with Writer by just setting the encoding to utf-8 but the proplem is how to really do it with a RandomAccessFile because i need a RandomAccessFile so ican write in a different positions in the file , if any one has an example with another language can he tell me it i really need this

Well, there's the writeUTF() method. But I don't think you are going to be happy with RandomAccessFile. Unless you can tell in advance how many bytes your String will require when converted to UTF-8, your idea of writing to different positions in the file is likely to cause problems when things start to overlap.

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    KIM...........kim@ aol.com.... 190132.............     2/9/2006.........2/9/2006.............928
    KIM...........kim@ aol.com.... 190133.............     2/9/2006.........2/9/2006.............928
    KIM...........kim@ aol.com.... 190159.............     2/13/2006.......2/14/2006............923
    KIM...........kim@ aol.com.... 190237.............     2/23/2006.......2/23/2006............914
    KIM...........kim@ aol.com.... 284109.............     9/28/2006.......9/28/2006............697
    KIM...........kim@ aol.com.... 286647.............     11/7/2006.......12/5/2006............629
    KIM...........kim@ aol.com.... 294631.............     4/2/2007.........3/4/2008.............174
    KIM...........kim@ aol.com.... 322922.............     7/29/2008.......7/29/2008............27
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    JOE...........joe@ aol.com.... 183336.............     1/28/2004.......3/9/2004.............1630
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    SAM...........sam@ aol.com....183877.............3/5/2004.........3/8/2004.............1631
    SAM...........sam@ aol.com....183879.............3/5/2004.........3/8/2004.............1631
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    NED...........ned@ aol.com.....292410.............3/15/2007.......7/22/2008............34
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    NED...........ned@ aol.com.....316789.............3/20/2008.......3/20/2008............158
    NED...........ned@ aol.com.....317528.............3/25/2008.......3/25/2008............153
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    Jim R.
    Date: Tue, 1 Dec 2009 14:50:27 -0700
    From: [email protected]
    To: [email protected]
    Subject: Help with opening Adobe Reader and downloading updates
    Under the help menu, there is an option to repair the installation of reader. Did you try that?
    >

  • Need help with JTextArea and Scrolling

    import java.awt.*;
    import java.awt.event.*;
    import java.text.DecimalFormat;
    import javax.swing.*;
    public class MORT_RETRY extends JFrame implements ActionListener
    private JPanel keypad;
    private JPanel buttons;
    private JTextField lcdLoanAmt;
    private JTextField lcdInterestRate;
    private JTextField lcdTerm;
    private JTextField lcdMonthlyPmt;
    private JTextArea displayArea;
    private JButton CalculateBtn;
    private JButton ClrBtn;
    private JButton CloseBtn;
    private JButton Amortize;
    private JScrollPane scroll;
    private DecimalFormat calcPattern = new DecimalFormat("$###,###.00");
    private String[] rateTerm = {"", "7years @ 5.35%", "15years @ 5.5%", "30years @ 5.75%"};
    private JComboBox rateTermList;
    double interest[] = {5.35, 5.5, 5.75};
    int term[] = {7, 15, 30};
    double balance, interestAmt, monthlyInterest, monthlyPayment, monPmtInt, monPmtPrin;
    int termInMonths, month, termLoop, monthLoop;
    public MORT_RETRY()
    Container pane = getContentPane();
    lcdLoanAmt = new JTextField();
    lcdMonthlyPmt = new JTextField();
    displayArea = new JTextArea();//DEFINE COMBOBOX AND SCROLL
    rateTermList = new JComboBox(rateTerm);
    scroll = new JScrollPane(displayArea);
    scroll.setSize(600,170);
    scroll.setLocation(150,270);//DEFINE BUTTONS
    CalculateBtn = new JButton("Calculate");
    ClrBtn = new JButton("Clear Fields");
    CloseBtn = new JButton("Close");
    Amortize = new JButton("Amortize");//DEFINE PANEL(S)
    keypad = new JPanel();
    buttons = new JPanel();//DEFINE KEYPAD PANEL LAYOUT
    keypad.setLayout(new GridLayout( 4, 2, 5, 5));//SET CONTROLS ON KEYPAD PANEL
    keypad.add(new JLabel("Loan Amount$ : "));
    keypad.add(lcdLoanAmt);
    keypad.add(new JLabel("Term of loan and Interest Rate: "));
    keypad.add(rateTermList);
    keypad.add(new JLabel("Monthly Payment : "));
    keypad.add(lcdMonthlyPmt);
    lcdMonthlyPmt.setEditable(false);
    keypad.add(new JLabel("Amortize Table:"));
    keypad.add(displayArea);
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    buttons.setLayout(new GridLayout( 1, 3, 5, 5));//SET CONTROLS ON BUTTONS PANEL
    buttons.add(CalculateBtn);
    buttons.add(Amortize);
    buttons.add(ClrBtn);
    buttons.add(CloseBtn);//ADD ACTION LISTENER
    CalculateBtn.addActionListener(this);
    ClrBtn.addActionListener(this);
    CloseBtn.addActionListener(this);
    Amortize.addActionListener(this);
    rateTermList.addActionListener(this);//ADD PANELS
    pane.add(keypad, BorderLayout.NORTH);
    pane.add(buttons, BorderLayout.SOUTH);
    pane.add(scroll, BorderLayout.CENTER);
    addWindowListener( new WindowAdapter()
    public void windowClosing(WindowEvent e)
    System.exit(0);
    public void actionPerformed(ActionEvent e)
    String arg = lcdLoanAmt.getText();
    int combined = Integer.parseInt(arg);
    if (e.getSource() == CalculateBtn)
    try
    JOptionPane.showMessageDialog(null, "Got try here", "Error", JOptionPane.ERROR_MESSAGE);
    catch(NumberFormatException ev)
    JOptionPane.showMessageDialog(null, "Got here", "Error", JOptionPane.ERROR_MESSAGE);
    if ((e.getSource() == CalculateBtn) && (arg != null))
    try{
    if ((e.getSource() == CalculateBtn) && (rateTermList.getSelectedIndex() == 1))
    monthlyInterest = interest[0] / (12 * 100);
    termInMonths = term[0] * 12;
    monthlyPayment = combined * (monthlyInterest / (1 - (Math.pow (1 + monthlyInterest,  -termInMonths))));
    lcdMonthlyPmt.setText(calcPattern.format(monthlyPayment));
    if ((e.getSource() == CalculateBtn) && (rateTermList.getSelectedIndex() == 2))
    monthlyInterest = interest[1] / (12 * 100);
    termInMonths = term[1] * 12;
    monthlyPayment = combined * (monthlyInterest / (1 - (Math.pow (1 + monthlyInterest,  -termInMonths))));
    lcdMonthlyPmt.setText(calcPattern.format(monthlyPayment));
    if ((e.getSource() == CalculateBtn) && (rateTermList.getSelectedIndex() == 3))
    monthlyInterest = interest[2] / (12 * 100);
    termInMonths = term[2] * 12;
    monthlyPayment = combined * (monthlyInterest / (1 - (Math.pow (1 + monthlyInterest,  -termInMonths))));
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    catch(NumberFormatException ev)
    JOptionPane.showMessageDialog(null, "Invalid Entry!\nPlease Try Again", "Error", JOptionPane.ERROR_MESSAGE);
    }                    //IF STATEMENTS FOR AMORTIZATION
    if ((e.getSource() == Amortize) && (rateTermList.getSelectedIndex() == 1))
    loopy(7, 5.35);
    if ((e.getSource() == Amortize) && (rateTermList.getSelectedIndex() == 2))
    loopy(15, 5.5);
    if ((e.getSource() == Amortize) && (rateTermList.getSelectedIndex() == 3))
    loopy(30, 5.75);
    if (e.getSource() == ClrBtn)
    rateTermList.setSelectedIndex(0);
    lcdLoanAmt.setText(null);
    lcdMonthlyPmt.setText(null);
    displayArea.setText(null);
    if (e.getSource() == CloseBtn)
    System.exit(0);
    private void loopy(int lTerm,double lInterest)
    double total, monthly, monthlyrate, monthint, monthprin, balance, lastint, paid;
    int amount, months, termloop, monthloop;
    String lcd2 = lcdLoanAmt.getText();
    amount = Integer.parseInt(lcd2);
    termloop = 1;
    paid = 0.00;
    monthlyrate = lInterest / (12 * 100);
    months = lTerm * 12;
    monthly = amount *(monthlyrate/(1-Math.pow(1+monthlyrate,-months)));
    total = months * monthly;
    balance = amount;
    while (termloop <= lTerm)
    displayArea.setCaretPosition(0);
    displayArea.append("\n");
    displayArea.append("Year " + termloop + " of " + lTerm + ": payments\n");
    displayArea.append("\n");
    displayArea.append("Month\tMonthly\tPrinciple\tInterest\tBalance\n");
    monthloop = 1;
    while (monthloop <= 12)
    monthint = balance * monthlyrate;
    monthprin = monthly - monthint;
    balance -= monthprin;
    paid += monthly;
    displayArea.setCaretPosition(0);
    displayArea.append(monthloop + "\t" + calcPattern.format(monthly) + "\t" + calcPattern.format(monthprin) + "\t");
    displayArea.append(calcPattern.format(monthint) + "\t" + calcPattern.format(balance) + "\n");
    monthloop ++;
    termloop ++;
    public static void main(String args[])
    MORT_RETRY f = new MORT_RETRY();
    f.setTitle("MORTGAGE PAYMENT CALCULATOR");
    f.setBounds(600, 600, 500, 500);
    f.setLocationRelativeTo(null);
    f.setVisible(true);
    }need help with displaying the textarea correctly and the scroll bar please.
    Message was edited by:
    new2this2020

    What's the problem you're having ???
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