asked on

creating a table on a JPanel using Swing

I am using swing to create a program's User Interface and I want a have a table into which i can import data and manipulate it, as you would find in a spreadsheet. Can this be done and if so how?

Please could you give me a coded example if one is available.......thanks!

ASKER CERTIFIED SOLUTION

Ovi

membership

This solution is only available to members.

To access this solution, you must be a member of Experts Exchange.

Start Free Trial

Ovi

Quick example :

import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.io.*;
import java.text.*;

import javax.swing.*;
import javax.swing.border.*;
import javax.swing.event.*;
import javax.swing.table.*;

public class StocksTable extends JFrame
{
protected JTable m_table;
protected StockTableData m_data;
protected JLabel m_title;

public StocksTable() {
super("Stocks Table");
setSize(600, 300);

m_data = new StockTableData();

m_title = new JLabel(m_data.getTitle(),
new ImageIcon("money.gif"), SwingConstants.LEFT);
m_title.setFont(new Font("TimesRoman",Font.BOLD,24));
m_title.setForeground(Color.black);
getContentPane().add(m_title, BorderLayout.NORTH);

m_table = new JTable();
m_table.setAutoCreateColumnsFromModel(false);
m_table.setModel(m_data);

for (int k = 0; k < StockTableData.m_columns.length; k++) {
DefaultTableCellRenderer renderer = new
DefaultTableCellRenderer();
renderer.setHorizontalAlignment(
StockTableData.m_columns[k].m_alignment);
TableColumn column = new TableColumn(k,
StockTableData.m_columns[k].m_width, renderer, null);
m_table.addColumn(column);
}

JTableHeader header = m_table.getTableHeader();
header.setUpdateTableInRealTime(false);

JScrollPane ps = new JScrollPane();
ps.getViewport().add(m_table);
getContentPane().add(ps, BorderLayout.CENTER);

WindowListener wndCloser = new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
};
addWindowListener(wndCloser);
setVisible(true);
}

public static void main(String argv[]) {
new StocksTable();
}
}

class StockData
{
public String m_symbol;
public String m_name;
public Double m_last;
public Double m_open;
public Double m_change;
public Double m_changePr;
public Long m_volume;

public StockData(String symbol, String name, double last,
double open, double change, double changePr, long volume) {
m_symbol = symbol;
m_name = name;
m_last = new Double(last);
m_open = new Double(open);
m_change = new Double(change);
m_changePr = new Double(changePr);
m_volume = new Long(volume);
}
}

class ColumnData
{
public String m_title;
public int m_width;
public int m_alignment;

public ColumnData(String title, int width, int alignment) {
m_title = title;
m_width = width;
m_alignment = alignment;
}
}

class StockTableData extends AbstractTableModel
{
static final public ColumnData m_columns[] = {
new ColumnData( "Symbol", 100, JLabel.LEFT ),
new ColumnData( "Name", 160, JLabel.LEFT ),
new ColumnData( "Last", 100, JLabel.RIGHT ),
new ColumnData( "Open", 100, JLabel.RIGHT ),
new ColumnData( "Change", 100, JLabel.RIGHT ),
new ColumnData( "Change %", 100, JLabel.RIGHT ),
new ColumnData( "Volume", 100, JLabel.RIGHT )
};

protected SimpleDateFormat m_frm;
protected Vector m_vector;
protected Date m_date;

public StockTableData() {
m_frm = new SimpleDateFormat("MM/dd/yyyy");
m_vector = new Vector();
setDefaultData();
}

public void setDefaultData() {
try {
m_date = m_frm.parse("4/6/1999");
}
catch (java.text.ParseException ex) {
m_date = null;
}

m_vector.removeAllElements();
m_vector.addElement(new StockData("ORCL", "Oracle Corp.",
23.6875, 25.375, -1.6875, -6.42, 24976600));
m_vector.addElement(new StockData("EGGS", "Egghead.com",
17.25, 17.4375, -0.1875, -1.43, 2146400));
m_vector.addElement(new StockData("T", "AT&T",
65.1875, 66, -0.8125, -0.10, 554000));
m_vector.addElement(new StockData("LU", "Lucent Technology",
64.625, 59.9375, 4.6875, 9.65, 29856300));
m_vector.addElement(new StockData("FON", "Sprint",
104.5625, 106.375, -1.8125, -1.82, 1135100));
m_vector.addElement(new StockData("ENML", "Enamelon Inc.",
4.875, 5, -0.125, 0, 35900));
m_vector.addElement(new StockData("CPQ", "Compaq Computers",
30.875, 31.25, -0.375, -2.18, 11853900));
m_vector.addElement(new StockData("MSFT", "Microsoft Corp.",
94.0625, 95.1875, -1.125, -0.92, 19836900));
m_vector.addElement(new StockData("DELL", "Dell Computers",
46.1875, 44.5, 1.6875, 6.24, 47310000));
m_vector.addElement(new StockData("SUNW", "Sun Microsystems",
140.625, 130.9375, 10, 10.625, 17734600));
m_vector.addElement(new StockData("IBM", "Intl. Bus. Machines",
183, 183.125, -0.125, -0.51, 4371400));
m_vector.addElement(new StockData("HWP", "Hewlett-Packard",
70, 71.0625, -1.4375, -2.01, 2410700));
m_vector.addElement(new StockData("UIS", "Unisys Corp.",
28.25, 29, -0.75, -2.59, 2576200));
m_vector.addElement(new StockData("SNE", "Sony Corp.",
96.1875, 95.625, 1.125, 1.18, 330600));
m_vector.addElement(new StockData("NOVL", "Novell Inc.",
24.0625, 24.375, -0.3125, -3.02, 6047900));
m_vector.addElement(new StockData("HIT", "Hitachi, Ltd.",
78.5, 77.625, 0.875, 1.12, 49400));
}

public int getRowCount() {
return m_vector==null ? 0 : m_vector.size();
}

public int getColumnCount() {
return m_columns.length;
}

public String getColumnName(int column) {
return m_columns[column].m_title;
}

public boolean isCellEditable(int nRow, int nCol) {
return false;
}

public Object getValueAt(int nRow, int nCol) {
if (nRow < 0 || nRow>=getRowCount())
return "";
StockData row = (StockData)m_vector.elementAt(nRow);
switch (nCol) {
case 0: return row.m_symbol;
case 1: return row.m_name;
case 2: return row.m_last;
case 3: return row.m_open;
case 4: return row.m_change;
case 5: return row.m_changePr;
case 6: return row.m_volume;
}
return "";
}

public String getTitle() {
if (m_date==null)
return "Stock Quotes";
return "Stock Quotes at "+m_frm.format(m_date);
}
}

Compile'it and runnit.