Unable to update my data.. why is that so..?

[Freya Tan]

i'm unable to update my data.. i'm not sure what have gone wrong.. Whenever i try to update, it would overwrite the first position of the data in the Textfile.. and then it's unable to display it.. (No matter which date i try to update, it's would definitely overwrite the first data)
Also how can i hightlight impt dates in a JList (as i'm doin a Calendar schedule) i want to have those date with appointment saved to be bold & in red colour..

Is there any kind soul out there that would help me.. I urgently need a reply.. Thanks.. Anxiously waiting 4 a reply..

Regards..

 

import java.io.*;
import java.util.*;
import java.awt.*;                   // Font, Color, Layout managers
import java.awt.event.*;             // ActionListener, WindowAdapter
import javax.swing.*;                // GUI components
import javax.swing.event.*;          // ListSelectionListener

class AppointmentPage extends JFrame implements ActionListener, ItemListener  {  


String months[] = {"January", "February", "March", "April", "May", "June",          
                   "July", "August", "September", "October", "November", "December"};


DefaultListModel lm = new DefaultListModel(); 
int comboCounter = 0;


private static final int FRAME_WIDTH = 420;
    private static final int FRAME_HEIGHT = 470;
    private static final int FRAME_X_ORIGIN = 280;
    private static final int FRAME_Y_ORIGIN = 140;
    private static final int BUTTON_WIDTH = 70;
    private static final int BUTTON_HEIGHT = 30;
    
    
    // Introduce Images, Listbox, 5 TextField, TextArea, 2 ComboBoxs & 5 Buttons
    private JButton addButton;
    private JButton EditButton;
    private JButton printButton;
    private JButton backButton;
    private JButton showappButton;
    
    private JList daylist;
    private JScrollPane scrollPane;
    private JComboBox jcbMonth;
    private JComboBox jcbYear;
   
  
    private JLabel image;
    private JTextField dayInput;
    private JTextField monthInput;
    private JTextField yearInput;
    private JTextField timeInput;
    private JTextField amInput;
private JTextArea appInput;
private int index;


public static void main (String[] args)  {
        AppointmentPage frame = new  AppointmentPage();
        frame.setVisible(true);  
  }

// constructor
public AppointmentPage()  { 
}


// constructor
public AppointmentPage(FindDay f, int index) {
 
 this.index = index; 


Container contentPane = getContentPane ();
   
   // Set the frame properties
 setSize (FRAME_WIDTH, FRAME_HEIGHT);
setResizable (true);
        setTitle ("View Appointment");
        setLocation (FRAME_X_ORIGIN, FRAME_Y_ORIGIN);
         
// Set the content pane properties
contentPane.setLayout (null);
        contentPane.setBackground (Color.pink);
        
        
        // Add images
        image = new JLabel (new ImageIcon("viewApp.jpg"));
image.setBounds (10,20,390,50);
contentPane.add (image);



// Add JList & Scrollbar
daylist = new JList(lm);
daylist.setBounds (70,148, 48, 184);
contentPane.add (daylist);

scrollPane = new JScrollPane(daylist);
scrollPane.setBounds (70,148, 48, 184);



// Add 2 JComboBox for the Month and Year & ActionListener
jcbMonth = new JComboBox();
jcbMonth.setBounds (150,100, 90, 20);

jcbYear = new JComboBox();
jcbYear.setBounds (60,100, 65, 20);

jcbMonth.addItemListener(this);    
jcbYear.addItemListener(this); 


// Add Month & Year
for(int x = 0; x < 30; x++)   {

if(x < 12) jcbMonth.addItem(months[x]);       
jcbYear.addItem(""+(x+2004));    
}

// Add ComboBoxs to contentPane
contentPane.add(jcbMonth);    
contentPane.add(jcbYear);    
contentPane.add(scrollPane);
setDefaultCloseOperation (EXIT_ON_CLOSE);      

setDays();                                    // Go to setDays() Method



// Add 5 JTextfield & TextArea
    dayInput = new JTextField ("");
dayInput.setBounds (147,160,25,20);
contentPane.add (dayInput);

monthInput = new JTextField ("");
monthInput.setBounds (177,160,80,20);
contentPane.add (monthInput);
    
    yearInput = new JTextField ("");
yearInput.setBounds (262,160,40,20);
contentPane.add (yearInput);
    timeInput = new JTextField ("");
timeInput.setBounds (147,195,40,20);
contentPane.add (timeInput);

amInput = new JTextField ("");
amInput.setBounds (192,195,30,20);
contentPane.add (amInput);

appInput = new JTextArea ("");
appInput.setBounds (147,235,200,80);
contentPane.add (appInput);


// Add 4 Buttons 
addButton = new JButton ("Add New");
        addButton.setBounds (145,360, 90, BUTTON_HEIGHT);
        contentPane.add (addButton);
        EditButton = new JButton ("Edit");
        EditButton.setBounds (248,360, 60, BUTTON_HEIGHT);
        contentPane.add (EditButton);
        
        printButton = new JButton ("Print");
        printButton.setBounds (320,360, 70, BUTTON_HEIGHT);
        contentPane.add (printButton); 
        
        showappButton = new JButton("Display App");
        showappButton.setBounds (21, 360, 110, BUTTON_HEIGHT);
        contentPane.add (showappButton);
        
        
        // register this frame as an ItemListener of the 2 ComboBoxs
        jcbMonth.addItemListener(this);
jcbYear.addItemListener(this);    

        
        // register this frame as an ActionListener of the 4 Buttons
        addButton.addActionListener (this);
EditButton.addActionListener (this);
        printButton.addActionListener (this);
        showappButton.addActionListener(this);
    }
        
    
    // Get days according to Month and Year selected
    public void setDays()  {    

int month = jcbMonth.getSelectedIndex();    
int year = Integer.parseInt(""+jcbYear.getSelectedItem());    

Calendar cal = Calendar.getInstance();    
cal.set(year,month,1);    

while(month == cal.get(Calendar.MONTH))  {      

lm.addElement(""+cal.get(Calendar.DATE));      
cal.add(Calendar.DATE,1);    
}  
}



public ArrayList getAppointments() throws IOException   {

boolean eof=false;
String inputStr="";
FindDay appo;
ArrayList AppList = new ArrayList();

File inputFile = new File("Appointment.txt");
FileInputStream in = new FileInputStream(inputFile);
InputStreamReader reader = new InputStreamReader(in);
BufferedReader fileInput = new BufferedReader(reader);


while (!eof)  {

try  {

inputStr=fileInput.readLine();

if (inputStr==null)

eof=true;

else  {

appo=new FindDay(inputStr,";");
AppList.add(appo);
  }
}

catch (EOFException e)  { 
          
          eof=true; 
        }

catch (IOException e)  { 
  
  eof=true; 
}

catch (NoSuchElementException e)  {

eof=true;
}
 }
in.close();
        return AppList;
}
    
    // Display data in the relevent TextField & TextArea
public void showData()  {

String da = (String)daylist.getSelectedValue();
String mo = (String)jcbMonth.getSelectedItem();
String ye = (String)jcbYear.getSelectedItem();

FindDay f;
ArrayList AppList = new ArrayList();
AppointmentPage al = new AppointmentPage();

try  {

AppList = al.getAppointments();
}

catch (IOException io)  {
}


// Go through ArrayList
for(int x = 0; x < AppList.size(); x++)  {

f = (FindDay)AppList.get(x);

// Check if date, month & year is vaild before displaying
if(f.date.equals(da) && f.month.equals(mo) && f.year.equals(ye))  {

// Display data in TextField or TextArea
dayInput.setText(f.getDate());
monthInput.setText(f.getMonth());
yearInput.setText(f.getYear());
        timeInput.setText(f.getTime());
        amInput.setText(f.getAm());
        appInput.setText(f.getApp());
        
        dayInput.requestFocus();
}
  }
}

    
    // Update data to TextFile
public void updateData() throws IOException  {

String da = dayInput.getText();        
    String mo = monthInput.getText();       
  String ye = yearInput.getText();         
  String ti = timeInput.getText();
  String am = amInput.getText();        
  String app = appInput.getText();        
         
  
  // Create new object
FindDay updateapp = new FindDay(da, mo, ye, ti, am, app);
      
  
  // Retrieve objects from TextFile and store in ArrayList
boolean eof = false;
String inputStr = "";
ArrayList AppList = new ArrayList();
FindDay aObjt;


// Read from TextFile
File inputFile = new File("Appointment.txt");
      
        FileInputStream in = new FileInputStream(inputFile);
        InputStreamReader reader = new InputStreamReader(in);
        BufferedReader fileInput = new BufferedReader(reader); 
        
        while (!eof)  {
        
        try  {
        
        inputStr = fileInput.readLine();
        
        if (inputStr == null)
        
        eof= true;
        
        else  {
        
        aObjt = new FindDay(inputStr,";");      // Add to Object
        AppList.add(aObjt);                     // Add to ArrayList
        }
         } 
        
        // Error Display
        catch (EOFException e)  {

eof = true;
}

  catch (IOException e)  {

System.out.println("Error reading from file");
eof = true;
}
    
    catch (NoSuchElementException e)  {

System.out.println("Error reading record:"+inputStr);
    }
     }

in.close();


// Overwrite object to be updated with the new Object
AppList.set(index, updateapp);
        
        
        // Store ArrayList back into TextFile
File outputFile = new File("Appointment.txt");

if (outputFile.exists())  {

outputFile.delete();
}


// Write TextFile
FileOutputStream out = new FileOutputStream(outputFile);
        PrintStream fileOutput = new PrintStream(out);
        
        for (int x = 0; x < AppList.size(); x++)  {
    
    aObjt = (FindDay)AppList.get(x);
    fileOutput.println(aObjt.getDate() + ";" + aObjt.getMonth() + ";" + aObjt.getYear() + ";" + aObjt.getTime()
                       + ";" + aObjt.getAm()  + ";" + aObjt.getApp());
        }
    
    out.close();
    showData();
    }
        
        
    
// ActionPerformed is invoked when a JButton is clicked 
   public void actionPerformed (ActionEvent e)  {

// See which button is begin clicked
if(e.getSource() == addButton)  {

enter();
} 
  
  if(e.getSource() == EditButton)  {
  
  try  {
   
updateData();
}

catch (IOException ex)  {
}
JOptionPane.showMessageDialog(this, "Entry Have Been Edited", "Successful", JOptionPane.INFORMATION_MESSAGE);
 }

  /*if(e.getSource() == printButton){
  print();
  } */

if(e.getSource() == showappButton)  { 

showData();
}
}


private void enter()  {

EnterNew enterFrame = new EnterNew();
enterFrame.setSize(420,470);     
enterFrame.setTitle("Appointment Entry");
enterFrame.setVisible(true);
this.setVisible(false);
}


// To allow List to be change without clicking on a button
public void itemStateChanged(ItemEvent ie)  {

if(comboCounter++ % 2 == 1)    {      
 
 lm.clear();      
 
 if(ie.getSource() == jcbYear ||  ie.getSource() == jcbMonth) 
 
 setDays();    
    }  
 
} 
 
 
 
 public void actionPerform (ActionEvent event){
if (event.getSource () instanceof JButton){
    JButton clickedButton = (JButton) event.getSource();
     String buttonText = clickedButton.getText();
           setTitle ("You clicked " + buttonText);
        }
    }
}
 

 

[Gregg Bolinger]

I'm going to try and explain something to you and I hope you understand that I am trying to help you here...
You need to stop asking so many questions in a single thread. The first part of this post...
i'm unable to update my data.. i'm not sure what have gone wrong.. Whenever i try to update, it would overwrite the first position of the data in the Textfile.. and then it's unable to display it.. (No matter which date i try to update, it's would definitely overwrite the first data)
...has nothing to do with Swing/AWT/JFC. Just because you are reading and writing to files from a Swing application doesn't make it a Swing problem. So this part of the question should really be seperated into a different post in the I/O and Streams forum. Now that doesn't mean repost this entire thread in that forum. That means, seperate your problems. You have 2 problems in this question.
Now your second problem is fine here in the Swing forum. So that one we can deal with. Here is a tutorial on JList. There is a link in that tutorial that talks about a Custom Cell Renderer. This is what you need to change the color of the items in your JList. I will let you find the link. That way I know you read the tutorial a little bit anyway.
Once you have started working on that part of your code, and are having problems, let's see what the problems are and go from there.
Again, concentrate on 1 issue at a time. It will make things easier for you. Especially since you are new to Java.

[Freya Tan]

Hi Mr Gregg,
I understand what u mean.. i would separate my problem the next time..
Now i need to know if anyone can reply me abt:

i'm unable to update my data.. i'm not sure what have gone wrong.. Whenever i try to update, it would overwrite the first position of the data in the Textfile.. and then it's unable to display it.. (No matter which date i try to update, it's would definitely overwrite the first data)

(becos u were saying i shouldn't post again in I/O & Stream)
So i'm not sure where i should post it now.. And i need to know what is the problem with my program asap.. Really sorry in creating so much troubles for u.. And a big Thanks..

[Gregg Bolinger]

Your problem is because you are creating a new file everytime instead of appending to the current file. You need to take a look at the API for FileOutputStream.
public FileOutputStream(File file, boolean append) throws FileNotFoundException
Creates a file output stream to write to the file represented by the specified File object. If the second argument is true, then bytes will be written to the end of the file rather than the beginning. A new FileDescriptor object is created to represent this file connection.
Hope that begins to help.

[Freya Tan]

Sorry.. i dun quite understand.. can u show me an example..?
Thanks

[Gregg Bolinger]

Originally posted by Freya Tan:
Sorry.. i dun quite understand.. can u show me an example..?
Thanks

Using your code...

FileOutputStream out = new FileOutputStream(outputFile, true);

That tells the OutputStream to write to the end of the outputFile instead of overwriting what is already there.

[Gregg Bolinger]

Since this is turning into an IO thread, I am going to move it to the I/O and Streams forum..

[Freya Tan]

(that's in my code)

FileOutputStream out = new FileOutputStream(outputFile); PrintStream fileOutput = new PrintStream(out);
for (int x = 0; x < AppList.size(); x++) {
aObjt = (FindDay)AppList.get(x);
fileOutput.println(aObjt.getDate() + ";" + aObjt.getMonth() + ";" + aObjt.getYear() + ";" + aObjt.getTime() + ";" + aObjt.getAm() + ";" + aObjt.getApp());
}

if that is inside my code already, then how cum i'm still overwriting it..?? pls point out the sentence that i have mistake in.. Thank u

[Freya Tan]

D:\Java Project\AppointmentPage.java:401: FileOutputStream(java.io.File,boolean) has private access in java.io.FileOutputStream
FileOutputStream out = new FileOutputStream(outputFile,true);
^
i have this error after adding the " (outputFile,True) ".. what is this error..?? i have nv seen it be.. any way to slove it..

Regards..

[Joe Ess]

If you looked at the java documentation for java.io.FileOutputStream, you'd see that the constructor you are using is available only in SDK's 1.4 and later. Are you using an older SDK/JDK?

[Freya Tan]

Thanks for replying..

Yes, i'm using a JDK 1.3.1 . anyway that i can change my coding to suit JDK 1.3.1 ... i have been trying for a few days and my deadline is tomorrow.. pls help me.. a big thanks to u..

Regards