"Cannot Resolve Symbols" Error

[Freya Tan]

i have got this error.. no sure what happen.. can anyone help me.. Urgently..
D:\Stephenie\School Work\Yr1 Semester 2\Java Project\AppointmentPage.java:109: cannot resolve symbol
symbol : method split (java.lang.String)
location: class java.lang.String
bits = line.split(";");
^
My code

 
String line;        
String[] bits; 
String split;       
while ((line = br.readLine()) != null)        {          
if(!line.equals(""))          {            
bits = line.split(";");            
appointments.add(new Appointment(bits[0],bits[1],bits[2],bits[3],bits[4]));       
  }      
     }
Thanks alot.. 
 

[John Smith]

The method split() of the String object is a new feature in JDK 1.4. Chances are, your compiler is older than that. Either upgrade to 1.4 or don't use split().

[Freya Tan]

How to i change this part in order not to user Split() ?
can u pls help me..?

[Freya Tan]

How can i change this part in order to avoid using Split() ?
can u pls help me..? Urgently..
(Post again becos of my typo error, Sorry)

[Ali Gohar]

Post your code and tell what do you want to do?

[Freya Tan]

This is the code given by one of the moderator..
Let me explain how my program works..
1) User has to select the Month & Year from the JComboBox, as well as the date from the JList and then click on the "Display App" button
2)this would however get the whatever data store under the date, month, year from textfile named("Appointment.txt")
3)and display in the 3 textfield (dayInput, timeInput & appInput)
That's about it..

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.io.*;
 
class AppointmentPage extends JFrame implements ActionListener, ItemListener
{
  ArrayList appointments = new ArrayList();
  int[] listElement = new int[100];
  String months[] = {"January", "February", "March", "April", "May", "June", 
      "July", "August", "September", "October", "November", "December"};
  JButton showBtn = new JButton("Show");
  JButton addBtn = new JButton("Add");
  JButton editBtn = new JButton("Edit");
  JButton deleteBtn = new JButton("Delete");
  JTextField tfTime = new JTextField(6);
  JTextField tfData = new JTextField(17);
  JLabel lblTime = new JLabel("Time:");
  JLabel lblData = new JLabel("Appointment detail:");
  DefaultListModel lm = new DefaultListModel();
  JList list = new JList(lm);
  JScrollPane sp = new JScrollPane(list);
  JComboBox jcbDay = new JComboBox();
  JComboBox jcbMonth = new JComboBox();
  JComboBox jcbYear = new JComboBox();
  int comboCounter = 0;
 
  public AppointmentPage()
  {
    setResizable(false);
    setTitle("Appointments");
    setLocation(300, 100);
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    jcbDay.addItemListener(this);
    jcbMonth.addItemListener(this);
    jcbYear.addItemListener(this);
    showBtn.addActionListener(this);
    addBtn.addActionListener(this);
    editBtn.addActionListener(this);
    deleteBtn.addActionListener(this);
    for (int x = 0; x < 20; x++)
    {
      if (x < 12)
      {
        jcbMonth.addItem(months[x]);
      }
      if (x < 20)
      {
        jcbYear.addItem("" + (x + 2004));
      }
    }
 
    Container contentPane = getContentPane();
    JPanel main = new JPanel(new BorderLayout());
    JPanel top = new JPanel(new FlowLayout());
    JPanel mid = new JPanel(new FlowLayout());
    JPanel bottom = new JPanel(new BorderLayout());
    JPanel left = new JPanel();
    JPanel right = new JPanel(new GridLayout(4, 0));
    top.add(jcbDay);
    top.add(jcbMonth);
    top.add(jcbYear);
    top.add(lblTime);
    top.add(tfTime);
    mid.add(lblData);
    mid.add(tfData);
    sp.setPreferredSize(new Dimension(250, 170));
    left.add(sp);
    right.add(showBtn);
    right.add(addBtn);
    right.add(editBtn);
    right.add(deleteBtn);
    bottom.add(left, BorderLayout.WEST);
    bottom.add(right, BorderLayout.EAST);
    main.add(top, BorderLayout.NORTH);
    main.add(mid, BorderLayout.CENTER);
    main.add(bottom, BorderLayout.SOUTH);
    contentPane.add(main);
    pack();
    setDays();
    readFileData();
  }
 
  public void setDays()
  {
    jcbDay.removeAllItems();
    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))
    {
      jcbDay.addItem("" + cal.get(Calendar.DATE));
      cal.add(Calendar.DATE, 1);
    }
  }
 
  public void readFileData()
  {
    try
    {
      File appFile = new File("Appointment.txt");
      if (appFile.exists())
      {
        BufferedReader br = new BufferedReader(new FileReader(appFile));
        String line;
        String[] bits;
        while ((line = br.readLine()) != null)
        {
          if (!line.equals(""))
          {
            bits = line.split(";");
            appointments.add(new Appointment(bits[0], bits[1], bits[2], 
                bits[3], bits[4]));
          }
        }
        br.close();
      }
      else
      {
        JOptionPane.showMessageDialog(null, "Appointment.txt not found");
      }
    }
    catch (Exception e)
    {
      JOptionPane.showMessageDialog(null, "Error reading from Appointment.txt");
    }
  }
 
  public void showData()
  {
    String dy = (String)jcbDay.getSelectedItem();
    String mth = (String)jcbMonth.getSelectedItem();
    String yr = (String)jcbYear.getSelectedItem();
    lm.clear();
    lm.addElement("Appointments for: " + dy + " " + mth + " " + yr);
    lm.addElement(" ");
    Appointment temp;
    int listLine = 2;
    for (int x = 0; x < appointments.size(); x++)
    {
      temp = (Appointment)appointments.get(x);
      if (temp.day.equals(dy) && temp.month.equals(mth) && temp.year.equals(yr))
      {
        lm.addElement(temp.time + " " + temp.data);
        listElement[listLine++] = x;
      }
    }
    tfTime.setText("");
    tfData.setText("");
  }
 
  public void addData()
  {
    if (tfTime.getText().equals("") || tfData.getText().equals(""))
    {
      JOptionPane.showMessageDialog(null, "error - at least one data field empty");
    }
    else
    {
      String dy = (String)jcbDay.getSelectedItem();
      String mth = (String)jcbMonth.getSelectedItem();
      String yr = (String)jcbYear.getSelectedItem();
      String tm = tfTime.getText();
      String data = tfData.getText();
      appointments.add(new Appointment(dy, mth, yr, tm, data));
      saveData();
      showData();
    }
  }
 
  public void editData()
  {
    if (tfTime.getText().equals("") || tfData.getText().equals(""))
    {
      JOptionPane.showMessageDialog(null, "error - at least one data field empty");
    }
    else
    {
      int lineNum = list.getSelectedIndex();
      if (lineNum > 1)
      {
        String dy = (String)jcbDay.getSelectedItem();
        String mth = (String)jcbMonth.getSelectedItem();
        String yr = (String)jcbYear.getSelectedItem();
        String tm = tfTime.getText();
        String data = tfData.getText();
        appointments.set(listElement[lineNum], 
            new Appointment(dy, mth, yr, tm, data));
        saveData();
        showData();
      }
      else
      {
        JOptionPane.showMessageDialog(null, "Invalid line to edit");
      }
    }
  }
 
  public void deleteData()
  {
    int lineNum = list.getSelectedIndex();
    if (lineNum > 1)
    {
      appointments.remove(listElement[lineNum]);
    }
    else
    {
      JOptionPane.showMessageDialog(null, "Invalid line to delete");
    }
    saveData();
    showData();
  }
 
  public void saveData()
  {
    try
    {
      PrintWriter out = new PrintWriter(new BufferedWriter(
          new FileWriter("Appointment.txt")));
      Appointment temp;
      for (int x = 0; x < appointments.size(); x++)
      {
        temp = (Appointment)appointments.get(x);
        out.println("" + temp.day + ";" + temp.month + ";" + temp.year + ";" + 
            temp.time + ";" + temp.data);
      }
      out.close();
    }
    catch (Exception e)
    {
      JOptionPane.showMessageDialog(null, "Error saving to Appointment.txt");
    }
  }
 
  public void actionPerformed(ActionEvent ae)
  {
    if (ae.getSource() == showBtn)
    {
      showData();
    }
    else if (ae.getSource() == addBtn)
    {
      addData();
    }
    else if (ae.getSource() == editBtn)
    {
      editData();
    }
    else
    {
      deleteData();
    }
  }
 
  public void itemStateChanged(ItemEvent ie)
  {
    if (comboCounter++ % 2 == 1)  //fires twice???    {      
    {
      lm.clear();
    }
    if (ie.getSource() == jcbYear || ie.getSource() == jcbMonth)
    {
      setDays();
    }
  }
}
 
public static void main (String[] args)
{
  new AppointmentPage().setVisible(true);
}
}
class Appointment
{
  String day, month, year, time, data;
 
  public Appointment(String pDay, String pMonth, String pYear, String pTime,
      String pData)
  {
    day = pDay;
    month = pMonth;
    year = pYear;
    time = pTime;
    data = pData;
  }
}

i have to avoid using Split() becos of the JDK1.4 thing.. my sch is using a JDK1.3.. so i have to avoid using this.. can u knidly pls help me.. i need a reply asap.. Urgently.. Thank u very very much..
[ edited to format code and to break really long lines -ds ]
[ April 19, 2004: Message edited by: Dirk Schreckmann ]

[Freya Tan]

Very sorry.. it's kind of messy and difficult for u to read.. but pls dun give up on helping me.. THANKS.. !!

[Nigel Browne]

Have a look at the java.util.StringTokenizer class, should be what you need.
HTH
Nigel
[ April 19, 2004: Message edited by: Nigel Browne ]

[Dirk Schreckmann]

Freya,
When asking folks around here for help, it's probably in your best interest to make it as easy as possible for folks to help you. So, if you're curious to learn how to break a String apart, posting 300 lines of unformatted GUI code that won't even compile and mostly has nothing to do with your question is probably not a good idea.
As suggested, to break your String apart, you'll likely want to make use of the StringTokenizer class. If you're not sure how to use it, a good way to begin to learn might be to take a look at the J2SE API documentation.
After you've tried something, possibly by using a small practice application, if you can't quite figure it out, post a question including what you're working on (with relevant and well-formatted code only). Try to explain what you're trying to do and in detail the problems you're having. These problems might include compiler errors, runtime errors, and/or unexpected runtime results.

[Viniiee Math]

Definitely StringTokenizer shud help you to get the result.