Store int values into dynamic array

Hello all,
I'm a newbie in JAVA whose want to store int values (coming from a resultset) into an dynamic array. I know that normally to create a "dynamic array" you'd better use a Vector, but it seems that I don't know how to use it correctly (throws me a exception as : Incompatible type for method. Can't convert int[] to java.lang.Object[]).
Thanks in advance
STF

I want to use the copyInto method of the vector, but it throw me an exception as ')' expected
I include a snip of my code below ;
Vector v= new Vector();
Vector vv=new Vector();
String[] labels=new String[v.size()];
Integer[] values=new Integer[vv.size()];
cont=rs.getInt("COUNT(CASE_ID_)");
vv.add(j,new Integer(cont));
log=rs.getString("ORIG_SUBMITTER");
v.add(j,new String(log));
v.copyInto(String[] labels);
vv.copyInto(Integer[] values);

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Edited by: ynotlim333 on Sep 24, 2007 8:44 PM
Edited by: ynotlim333 on Sep 24, 2007 8:45 PM

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<%
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Store multiple values into a variable

I was wondering if it was possible to store multiple values into one varaible. Something along the lines of...
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1         2009
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aka
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Here's a basic idea building a comma seperated list, then consuming it in another query (taking the in list approach from Tom's post, linked earlier).
create table xsample (s_id number not null, year number);
insert into xsample select level, 2009 from dual connect by level <=4;
commit;
declare
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   v_parameter_list varchar2(4000);
begin
--create the comma seperated list
select
    substr(max(sys_connect_by_path(s_id, ',') ), 2, 4000)
into
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from
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    from xsample
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start with rn = 1
connect by prior rn = rn - 1;
--consume the comma seperated list
for x in
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      select
        trim( substr (txt,
        instr (txt, ',', 1, level ) + 1,
        instr (txt, ',', 1, level+1)
        - instr (txt, ',', 1, level) -1 ) ) as token
      from
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        from dual
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    select *
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loop
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end loop;
end;
/

(Urgent help needed) how to read txt file and store the data into 2D-array?

Hi, I have a GUI which allow to choose file from the file chooser, and when "Read file" button is pressed, I want to show the array data into the textarea.
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Thanks in advance.
import java.io.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
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private JPanel buttonpnl;
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private File fileName;
private String[][] data;
private int numLines;
public FileReduction1(String s) {
super(s);
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pnlfile=new JPanel(new BorderLayout());
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openButton.addActionListener(this);
pnlfile.add(openButton,BorderLayout.WEST);
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readButton.addActionListener(this);
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pnlfile.add(readButton,BorderLayout.EAST);
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cp.add(new JScrollPane(textArea),BorderLayout.CENTER);
processButton = new JButton("Process");
//processButton.addActionListener(this);
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buttonbar=new JPanel(new FlowLayout(FlowLayout.RIGHT));
buttonpnl=new JPanel(new GridLayout(1,0));
buttonpnl.add(processButton);
buttonpnl.add(saveButton);
buttonbar.add(buttonpnl);
cp.add(buttonbar,BorderLayout.SOUTH);
/* ACTION PERFORMED */
public void actionPerformed(ActionEvent event) {
if (event.getActionCommand().equals("Open File")) getFileName();
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/* OPEN THE FILE */
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// Display file dialog so user can select file to open
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textfield.setText(fileName.getName());
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/* Get number of lines in file and prepare data structure. */
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int counter = 0;
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     try {
     String line = fileInput.readLine();
     while (line != null) {
     counter++;
          System.out.println("(" + counter + ") " + line);
line = fileInput.readLine();
     numLines = counter;
closeFile();
     catch(IOException ioException) {
     JOptionPane.showMessageDialog(this,"Error reading File",
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     closeFile();
     System.exit(1);
/* READ FILE */
private void readTheFile() {
// Open the file
int row=0;
int col=0;
     openFile();
System.out.println("Read the file");
     // Loop through file incrementing counter
     try {
String line = fileInput.readLine();
     while (line != null)
StringTokenizer st=new StringTokenizer(line);
while(st.hasMoreTokens())
data[row][col]=st.nextToken();
System.out.println(data[row][col]);
col++;
row++;
closeFile();
catch(IOException ioException) {
     JOptionPane.showMessageDialog(this,"Error reading File",
               "Error 5: ",JOptionPane.ERROR_MESSAGE);
     closeFile();
     System.exit(1);
/* CHECK FILE NAME */
/* Return flase if selected file is a directory, access is denied or is
not a file name. */
private boolean checkFileName() {
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     if (fileName.canRead()) {
          if (fileName.isFile()) return(true);
          else JOptionPane.showMessageDialog(null,
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     else JOptionPane.showMessageDialog(null,
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/* FILE HANDLING UTILITIES */
/* OPEN FILE */
private void openFile() {
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     // Open file
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     fileInput = new BufferedReader(file);
     catch(IOException ioException) {
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System.out.println("File opened");
/* CLOSE FILE */
private void closeFile() {
if (fileInput != null) {
     try {
          fileInput.close();
     catch (IOException ioException) {
     JOptionPane.showMessageDialog(this,"Error Opening File",
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System.out.println("File closed");
/* MAIN METHOD */
/* MAIN METHOD */
public static void main(String[] args) throws IOException {
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     newFile.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     newFile.setSize(500,400);
newFile.setVisible(true);
Java.lang.NullpointException
at FileReductoin1.readTheFile <FileReduction1.java :172>
at FileReductoin1.readFile <FileReduction1.java :110>
at FileReductoin1.actionPerformed <FileReduction1.java :71>
.

1) Next time use the CODE tags. this is way too much unreadable crap.
2) The problem is your String[][] data.... the only place I see you do anything approching initializing it is
data = new String[numLines][];I think you want to do this..
data = new String[numLines][3];anyway that's why it's blowing up on the line
data[row][col]=st.nextToken();

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Hi qwedwe.
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Go to Solution.
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Yet another road block in my destination to completing my program. I wanted to create a MultiColumn Combobox and needed to store my Database values into an array so I get get them into the Combobox. I'm having trouble getting this code to work properly. It seems that the the combobox wont accept the variable items maybe because it is outside the scope? I tried to move the code around to get it to work but it don't.
here is the code.
package pms;
import java.awt.*;
import javax.swing.*;
import java.sql.*;
public class Test3 extends JFrame {
    public static void main(String[] args) {
        new Test3();
    public Test3() {
        Container c = getContentPane();
        c.setLayout(new BorderLayout());
        c.setBackground(Color.gray);
        DBConnection db = new DBConnection();
        try {
            Connection conn = DriverManager.getConnection(db.connUrl);
            Statement sql = conn.createStatement();
            ResultSet rs = sql.executeQuery("SELECT * FROM Referrals ORDER BY Referral_Text");
            while (rs.next()) {
                Item[] items = {
                    new Item(rs.getString(2), rs.getString(2)),};
            JComboBox jcb = new JComboBox(items);
            //Close connections.
            rs.close();
            sql.close();
            conn.close();
        } catch (SQLException e) {
            e.getStackTrace();
        jcb.setPreferredSize(new Dimension(24, 24));
        jcb.setRenderer(new ItemRenderer());
        c.add(jcb, BorderLayout.NORTH);
        setSize(200, 100);
        setLocationRelativeTo(null);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setVisible(true);
// The items to display in the combobox...
    class Item {
        String itemName = "";
        String itemValue = "";
        public Item(String name, String value) {
            itemName = name;
            itemValue = value;
// The combobox's renderer...
    class ItemRenderer extends JPanel implements ListCellRenderer {
        private JLabel nameLabel = new JLabel(" ");
        private JLabel valueLabel = new JLabel(" ");
        public ItemRenderer() {
            setOpaque(true);
            setLayout(new GridLayout(1, 2));
            add(nameLabel);
            add(valueLabel);
        public Component getListCellRendererComponent(
                JList list,
                Object value,
                int index,
                boolean isSelected,
                boolean cellHasFocus) {
            nameLabel.setText(((Item) value).itemName);
            valueLabel.setText(((Item) value).itemValue);
            if (isSelected) {
                setBackground(Color.black);
                nameLabel.setForeground(Color.white);
                valueLabel.setForeground(Color.white);
            } else {
                setBackground(Color.white);
                nameLabel.setForeground(Color.black);
                valueLabel.setForeground(Color.black);
            return this;
}Thanks!

He is telling you that there are two problems with your code.
The first is that you are declaring the items array inside the while loop, which means its scope is too limited - it can't be accessed by the JComboBox which is declared later.
The second is that you are recreating the items array for every record in your ResultSet. This implies that for every new record, the item(s) already stored will be removed from memory and replaced by the values of the latest record, leading to a single option for your combo box.
Try instead creating an ArrayList object that you initialise right before the loop, and add items to it's collection as you move along. Then pass that ArrayList to the JComboBox in this way:
          try {
               Connection conn = DriverManager.getConnection(db.connUrl);
               Statement sql = conn.createStatement();
               ResultSet rs = sql
                         .executeQuery("SELECT * FROM Referrals ORDER BY ReferItemText");
               ArrayList<Item> items = new ArrayList<Item>();
               while (rs.next()) {
                    items.add(new Item(rs.getString(2), rs.getString(2)));
               JComboBox jcb = new JComboBox(items.toArray());
               // Close connections.
               rs.close();
               sql.close();
               conn.close();
          } catch (SQLException e) {
               e.getStackTrace();
          }

Store int values into dynamic array

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