Hey... I present myself.. Youssef, 17 years old and i'm currently on my second year of the IB Program ... Computer IB HL i took. As some of you might know our IA = Internal Assessement is a Java Database and now mine is due wednesday... [PART I] and i need your guys help... I have a skeleton... you create a random acces file, and open it in a notepad.. then u run my program.. Team (only team needs to work for now) you can ADD a team ...click next next.. then you can click View team... (yet there there is a problem it only displays the first record tehn displays the message "No More Records" knowing that i have inputed more records iny my Add.. I would be eternally grateful if some one could help me by tonight plzzzzzzzzzz ..... so i could show my teacher tomorow.. If someone could fix me the View (READ RANDOM FILE) error.... and then have me a script thats working for EDIT & DELETE... cuz they're not in the book and i have no clue how to open then delete my record :S... Delete is due tomorow, and the rest wednesday... i know all this for tonight is alot but some of few are experts and could do this in a 20-30 min ... so if some one could save me by correcting my VIEW, and writing me a script for EDIT/DELETE that would really help... if you want just give me an example of delete.. and ill try adapting it with my variables... anw... plz guyz help would be nice... Here are my codes..
//BASKETBALL SKELETON//
package Basketball;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Basketball extends JFrame
{
private final Color colorValues[] =
{ Color.black, Color.blue, Color.red, Color.green };
private JRadioButtonMenuItem colorItems[], fonts[];
private JCheckBoxMenuItem styleItems[];
private JLabel displayLabel;
private ButtonGroup fontGroup, colorGroup;
private int style;
// set up GUI
public Basketball()
{
super( "BBGS SOFTWARE" );
// set up team menu and its menu items
JMenu teamMenu = new JMenu( "Team" );
// set up Add team menu item
JMenuItem addTeam = new JMenuItem( "Add" );
teamMenu.add( addTeam );
addTeam.addActionListener(
new ActionListener() { // anonymous inner class
public void actionPerformed( ActionEvent event )
{
new WriteRF();
}
}
);
JMenuItem editTeam = new JMenuItem( "Edit Team" );
teamMenu.add( editTeam );
editTeam.addActionListener(
new ActionListener() { // anonymous inner class
// display message dialog when user selects About...
public void actionPerformed( ActionEvent event )
{
}
} // end anonymous inner class
); // end call to addActionListener
JMenuItem deleteTeam = new JMenuItem( "Delete Team" );
teamMenu.add( deleteTeam );
deleteTeam.addActionListener(
new ActionListener() { // anonymous inner class
// display message dialog when user selects About...
public void actionPerformed( ActionEvent event )
{
}
} // end anonymous inner class
); // end call to addActionListener
// set up List team menu item
JMenuItem listTeam = new JMenuItem( "View Teams" );
teamMenu.add( listTeam );
listTeam.addActionListener(
new ActionListener() { // anonymous inner class
// display message dialog when user selects About...
public void actionPerformed( ActionEvent event )
{
new ReadRF();
}
} // end anonymous inner class
); // end call to addActionListener
// create menu bar and attach it to Basketball window
JMenuBar bar = new JMenuBar();
setJMenuBar( bar );
bar.add( teamMenu );
// set up teamship menu and its menu items
JMenu teamshipMenu = new JMenu( "Game" );
// set up Add team menu item
JMenuItem addGame = new JMenuItem( "Add Game" );
teamshipMenu.add( addGame );
addGame.addActionListener(
new ActionListener() { // anonymous inner class
// display message dialog when user selects About...
public void actionPerformed( ActionEvent event )
{
JOptionPane.showMessageDialog( Basketball.this,
"Add a Game",
"Adding", JOptionPane.PLAIN_MESSAGE );
}
}
);
JMenuItem editGame = new JMenuItem( "Edit/Delete Game" );
teamshipMenu.add( editGame );
editGame.addActionListener(
new ActionListener() { // anonymous inner class
// display message dialog when user selects About...
public void actionPerformed( ActionEvent event )
{
JOptionPane.showMessageDialog( Basketball.this,
"Edit a Game",
"Editing", JOptionPane.PLAIN_MESSAGE );
}
} // end anonymous inner class
); // end call to addActionListener
// set up List team menu item
JMenuItem listGame = new JMenuItem( "List Games" );
teamshipMenu.add( listGame );
listGame.addActionListener(
new ActionListener() { // anonymous inner class
// display message dialog when user selects About...
public void actionPerformed( ActionEvent event )
{
JOptionPane.showMessageDialog( Basketball.this,
"Lisiting Games",
"View", JOptionPane.PLAIN_MESSAGE );
}
} // end anonymous inner class
); // end call to addActionListener
// create menu bar and attach it to Basketball window
bar.add( teamshipMenu );
// set up Exit menu item
JMenu exitMenu = new JMenu( "Exit" );
exitMenu.addActionListener(
new ActionListener() { // anonymous inner class
// terminate application when user clicks exitItem
public void actionPerformed( ActionEvent event )
{
System.exit( 0 );
}
} // end anonymous inner class
); // end call to addActionListener
bar.add( exitMenu );
displayLabel = new JLabel( "Welcome", SwingConstants.CENTER );
displayLabel.setForeground( colorValues[ 0 ] );
displayLabel.setFont( new Font( "Serif", Font.PLAIN, 52 ) );
//getContentPane().setBackground( Color.CYAN );
getContentPane().add( displayLabel, BorderLayout.PAGE_END );
setSize(800, 600 );
setLocation(200, 240);
setVisible( true );
}
public static void main( String args[] )
{
Basketball application = new Basketball();
application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
}
}
// end class Basketballs//WRITE RANDOM FILE
package Basketball;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import javax.swing.*;
public class WriteRF extends JFrame {
private RandomAccessFile output;
private GUI userInterface;
private JButton enterButton, openButton;
private static final int NUMBER_RECORDS = 100;
// set up GUI
public WriteRF()
{
super( "Write to random access file" );
// create instance of reusable user interface BankUI
userInterface = new GUI( 2 ); // four textfields
getContentPane().add( userInterface,
BorderLayout.CENTER );
openButton = userInterface.getDoTask1Button();
openButton.setText( "Get File..." );
// register listener to call openFile when button pressed
openButton.addActionListener(
// anonymous inner class to handle openButton event
new ActionListener() {
// allow user to select file to open
public void actionPerformed( ActionEvent event )
{
openFile();
}
} // end anonymous inner class
); // end call to addActionListener
// register window listener for window closing event
addWindowListener(
// anonymous inner class to handle windowClosing event
new WindowAdapter() {
// add record in GUI, then close file
public void windowClosing( WindowEvent event )
{
if ( output != null )
addRecord();
closeFile();
}
} // end anonymous inner class
); // end call to addWindowListener
// get reference to generic task button doTask2 in BankUI
enterButton = userInterface.getDoTask2Button();
enterButton.setText( "Next" );
enterButton.setEnabled( false );
// register listener to call addRecord when button pressed
enterButton.addActionListener(
// anonymous inner class to handle enterButton event
new ActionListener() {
// add record to file
public void actionPerformed( ActionEvent event )
{
addRecord();
}
} // end anonymous inner class
); // end call to addActionListener
setSize( 300, 150 );
setVisible( true );
}
// enable user to choose file to open
private void openFile()
{
// display file dialog so user can select file
JFileChooser fileChooser = new JFileChooser();
fileChooser.setFileSelectionMode( JFileChooser.FILES_ONLY );
int result = fileChooser.showOpenDialog( this );
// if user clicked Cancel button on dialog, return
if ( result == JFileChooser.CANCEL_OPTION )
return;
// obtain selected file
File fileName = fileChooser.getSelectedFile();
// display error if file name invalid
if ( fileName == null || fileName.getName().equals( "" ) )
JOptionPane.showMessageDialog( this, "Invalid File Name",
"Invalid File Name", JOptionPane.ERROR_MESSAGE );
else {
// open file
try {
output = new RandomAccessFile( fileName, "rw" );
enterButton.setEnabled( true );
openButton.setEnabled( false );
}
// process exception while opening file
catch ( IOException ioException ) {
JOptionPane.showMessageDialog( this, "File does not exist",
"Invalid File Name", JOptionPane.ERROR_MESSAGE );
}
} // end else
} // end method openFile
// close file and terminate application
private void closeFile()
{
// close file and exit
try {
if ( output != null )
output.close();
System.exit( 0 );
}
// process exception while closing file
catch( IOException ioException ) {
JOptionPane.showMessageDialog( this, "Error closing file",
"Error", JOptionPane.ERROR_MESSAGE );
System.exit( 1 );
}
} // end method closeFile
// add one record to file
private void addRecord()
{
int teamidnumber = 0;
String fields[] = userInterface.getFieldValues();
RaRecord record = new RaRecord();
// ensure account field has a value
if ( ! fields[ GUI.TEAMID ].equals( "" ) ) {
// output values to file
try {
teamidnumber = Integer.parseInt( fields[ GUI.TEAMID ] );
if ( teamidnumber > 0 && teamidnumber <= NUMBER_RECORDS ) {
record.setTeamid( teamidnumber );
record.setTeam( fields[ GUI.TEAM ] );
output.seek( ( teamidnumber - 1 ) *
RaRecord.SIZE );
record.write( output );
}
else
{
JOptionPane.showMessageDialog( this,
"Team Id must be between 0 and 100",
"ID number Invalid", JOptionPane.ERROR_MESSAGE );
}
userInterface.clearFields(); // clear TextFields
} // end try
// process improper account number or balance format
catch ( NumberFormatException formatException ) {
JOptionPane.showMessageDialog( this,
"Invalid ID",
"Invalid Number Format", JOptionPane.ERROR_MESSAGE );
}
// process exceptions while writing to file
catch ( IOException ioException ) {
JOptionPane.showMessageDialog( this,
"Error writing to the file", "IO Exception",
JOptionPane.ERROR_MESSAGE );
closeFile();
}
}
}
}
// END WRITE RANDOM FILE//READ RANDOM FILE//
package Basketball;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.text.DecimalFormat;
import javax.swing.*;
public class ReadRF extends JFrame {
private GUI userInterface;
private RandomAccessFile input;
private JButton nextButton, openButton;
// set up GUI
public ReadRF()
{
super( "View Team List" );
// create reusable user interface instance
userInterface = new GUI( 2 );
getContentPane().add( userInterface );
// configure generic doTask1 button from BankUI
openButton = userInterface.getDoTask1Button();
openButton.setText( "View Files for Listing..." );
// register listener to call openFile when button pressed
openButton.addActionListener(
// anonymous inner class to handle openButton event
new ActionListener() {
// enable user to select file to open
public void actionPerformed( ActionEvent event )
{
openFile();
}
} // end anonymous inner class
); // end call to addActionListener
// configure generic doTask2 button from BankUI
nextButton = userInterface.getDoTask2Button();
nextButton.setText( "Next" );
nextButton.setEnabled( false );
// register listener to call readRecord when button pressed
nextButton.addActionListener(
// anonymous inner class to handle nextButton event
new ActionListener() {
// read a record when user clicks nextButton
public void actionPerformed( ActionEvent event )
{
readRecord();
}
} // end anonymous inner class
); // end call to addActionListener
// register listener for window closing event
addWindowListener(
// anonymous inner class to handle windowClosing event
new WindowAdapter() {
// close file and terminate application
public void windowClosing( WindowEvent event )
{
closeFile();
}
} // end anonymous inner class
); // end call to addWindowListener
setSize( 300, 150 );
setVisible( true );
} // end constructor
// enable user to select file to open
private void openFile()
{
// display file dialog so user can select file
JFileChooser fileChooser = new JFileChooser();
fileChooser.setFileSelectionMode( JFileChooser.FILES_ONLY );
int result = fileChooser.showOpenDialog( this );
// if user clicked Cancel button on dialog, return
if ( result == JFileChooser.CANCEL_OPTION )
return;
// obtain selected file
File fileName = fileChooser.getSelectedFile();
// display error is file name invalid
if ( fileName == null || fileName.getName().equals( "" ) )
JOptionPane.showMessageDialog( this, "Invalid File Name",
"Invalid File Name", JOptionPane.ERROR_MESSAGE );
else {
// open file
try {
input = new RandomAccessFile( fileName, "r" );
nextButton.setEnabled( true );
openButton.setEnabled( false );
}
// catch exception while opening file
catch ( IOException ioException ) {
JOptionPane.showMessageDialog( this, "File does not exist",
"Invalid File Name", JOptionPane.ERROR_MESSAGE );
}
} // end else
} // end method openFile
// read one record
private void readRecord()
{
RaRecord record = new RaRecord();
// read a record and display
try {
do {
record.read( input );
} while ( record.getTeamid() == 0 );
String values[] = { String.valueOf( record.getTeamid() ),
record.getTeam()};
userInterface.setFieldValues( values );
}
// close file when end-of-file reached
catch ( EOFException eofException ) {
JOptionPane.showMessageDialog( this, "No more records",
"End-of-file reached", JOptionPane.INFORMATION_MESSAGE );
closeFile();
}
// process exceptions from problem with file
catch ( IOException ioException ) {
JOptionPane.showMessageDialog( this, "Error Reading File",
"Error", JOptionPane.ERROR_MESSAGE );
System.exit( 1 );
}
} // end method readRecord
// close file and terminate application
private void closeFile()
{
// close file and exit
try {
if ( input != null )
input.close();
System.exit( 0 );
}
// process exception closing file
catch( IOException ioException ) {
JOptionPane.showMessageDialog( this, "Error closing file",
"Error", JOptionPane.ERROR_MESSAGE );
System.exit( 1 );
}
} // end method closeFile
}
//END READ RANDOM FILE//GUI//
package Basketball;
import java.awt.*;
import javax.swing.*;
public class GUI extends JPanel {
// label text for GUI
protected final static String names[] = { "Team ID",
"Team" };
// GUI components; protected for future subclass access
protected JLabel labels[];
protected JTextField fields[];
protected JButton doTask1, doTask2;
protected JPanel innerPanelCenter, innerPanelSouth;
protected int size; // number of text fields in GUI
// constants representing text fields in GUI
public static final int TEAMID = 0, TEAM = 1;
public GUI( int mySize )
{
size = mySize;
labels = new JLabel[ size ];
fields = new JTextField[ size ];
// create labels
for ( int count = 0; count < labels.length; count++ )
labels[ count ] = new JLabel( names[ count ] );
// create text fields
for ( int count = 0; count < fields.length; count++ )
fields[ count ] = new JTextField();
// create panel to lay out labels and fields
innerPanelCenter = new JPanel();
innerPanelCenter.setLayout( new GridLayout( size, 2 ) );
// attach labels and fields to innerPanelCenter
for ( int count = 0; count < size; count++ ) {
innerPanelCenter.add( labels[ count ] );
innerPanelCenter.add( fields[ count ] );
}
// create generic buttons; no labels or event handlers
doTask1 = new JButton();
doTask2 = new JButton();
// create panel to lay out buttons and attach buttons
innerPanelSouth = new JPanel();
innerPanelSouth.add( doTask1 );
innerPanelSouth.add( doTask2 );
// set layout of this container and attach panels to it
setLayout( new BorderLayout() );
add( innerPanelCenter, BorderLayout.CENTER );
add( innerPanelSouth, BorderLayout.SOUTH );
validate(); // validate layout
} // end constructor
// return reference to generic task button doTask1
public JButton getDoTask1Button()
{
return doTask1;
}
// return reference to generic task button doTask2
public JButton getDoTask2Button()
{
return doTask2;
}
// return reference to fields array of JTextFields
public JTextField[] getFields()
{
return fields;
}
// clear content of text fields
public void clearFields()
{
for ( int count = 0; count < size; count++ )
fields[ count ].setText( "" );
}
// set text field values; throw IllegalArgumentException if
// incorrect number of Strings in argument
public void setFieldValues( String strings[] )
throws IllegalArgumentException
{
if ( strings.length != size )
throw new IllegalArgumentException( "There must be " +
size + " Strings in the array" );
for ( int count = 0; count < size; count++ )
fields[ count ].setText( strings[ count ] );
}
// get array of Strings with current text field contents
public String[] getFieldValues()
{
String values[] = new String[ size ];
for ( int count = 0; count < size; count++ )
values[ count ] = fields[ count ].getText();
return values;
}
}
// END OF GUI//RECORD
package Basketball;
import java.io.Serializable;
public class TeamRecord implements Serializable {
private int teamid;
private String team;
// no-argument constructor calls other constructor with default values
public TeamRecord()
{
this( 0, "" );
}
// initialize a record
public TeamRecord( int id, String tm )
{
setTeamid( id );
setTeam( tm );
}
// set id number
public void setTeamid( int id )
{
teamid = id;
}
// get id number
public int getTeamid()
{
return teamid;
}
// set team
public void setTeam( String tm )
{
team = tm;
}
// get first name
public String getTeam()
{
return team;
}
}
// eND OF RECORD//RANDOM ACCESS RECORD
package Basketball;
import java.io.*;
public class RaRecord extends TeamRecord {
public static final int SIZE = 72;
// no-argument constructor calls other constructor with default values
public RaRecord()
{
this( 0, "" );
}
public RaRecord( int teamid, String team )
{
super( teamid, team );
}
// read a record from specified RandomAccessFile
public void read( RandomAccessFile file ) throws IOException
{
setTeamid( file.readInt() );
setTeam( readName( file ) );
}
private String readName( RandomAccessFile file ) throws IOException
{
char name[] = new char[ 15 ], temp;
for ( int count = 0; count < name.length; count++ ) {
temp = file.readChar();
name[ count ] = temp;
}
return new String( name ).replace( '\0', ' ' );
}
// write a record to specified RandomAccessFile
public void write( RandomAccessFile file ) throws IOException
{
file.writeInt( getTeamid() );
writeName( file, getTeam() );
}
private void writeName( RandomAccessFile file, String name )
throws IOException
{
StringBuffer buffer = null;
if ( name != null )
buffer = new StringBuffer( name );
else
buffer = new StringBuffer( 15 );
buffer.setLength( 15 );
file.writeChars( buffer.toString() );
}
}
// END OF RANDOM ACCES RECORD//if anyone could help me ... plzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz :S:S you peeps are my last chance... thankkkkksss (l)
