Print JTable with column heading

Hi,
I'm very new to this JTable. I'm try to print a Jtable using the print() function (from JDK 1.5)
JTable.print(JTable.PrintMode.FIT_WIDTH, new MessageFormat(
_tabledata.getTitle() ),
new MessageFormat("Page {0,number}"));
The problem I have is that some time it print and other time it doens't print. Also, if it doesn't print, then the program become very slow or not respond. Is that the probelm with the new JDK or am I doing something wrong?
Thanks for you help.

Don't rely on JTable.print() methods too much.
Sadly Sun didn't think anyone would need to print anything from java so support was added late and half heartedly (programmers hate printing stuff)
If you are new to java you need to focus on something simpler than printing documents; unfortunatly printing is a tedious burdonsome task for experreineced developers
for example: learn how to output your data from a table into an HTML formate/file; you can build beautiful reports/printouts easily and view them in java components easily but you will probably want to print them from a browser.
Even if you find a class or two to help with your printing efforts on the net you will find you need to know many other generic complicated aspects of java to continue
Sean

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Hi Folks,
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I suppose as a quick update, this is as far as I've gotten and will likely get-
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Hi everybody,
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Hello,
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append fld_tab.
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Jtable without column header

Hi all,
I have searched for jtable without column header... and if it´s possible how can I make?
thanks

Override JTable#configureEnclosingScrollPane() to do nothing or remove the table header manually ( jScrollPane.setColumnHeader(null) ) after you added the table to the scroll pane.

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You have only to embed this javascript code in your pdf:
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3) To print with a more proffesional style, so that it doesn't look like a screen capture is printed
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import javax.swing.*;
import javax.swing.table.*;
import java.awt.print.*;
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import java.awt.Dimension;
import javax.print.*;
import javax.print.attribute.*;
import javax.print.attribute.standard.*;
import java.text.*;
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     private final int CENTER_ALIGN = 0;
     private final int RIGHT_ALIGN = 1;
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                    System.exit(0);
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               "latest price",
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               {new Integer(count++), "Box of BirosBox of BirosBox of BirosBox of BirosBox of BirosBox of BirosBox of BirosBox of BirosBox of BirosBox of BirosBox of BirosBox of BirosBox of BirosBox of Biros ppppppppppppppp", "1.00", "4.99", new Date(), new Integer(200000)},
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               {new Integer(count++), "Blue Biro", "0.10", "0.14", new Date(), new Integer(1)},
               {new Integer(count++), "legal pad", "1.00", "2.49", new Date(), new Integer(1)},
               {new Integer(count++), "tape", "1.00", "1.49", new Date(), new Integer(1)},
               {new Integer(count++), "stapler", "4.00", "4.49", new Date(), new Integer(1)},
               {new Integer(count++), "Box of Biros", "1.00", "4.99", new Date(), new Integer(2)},
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               {new Integer(count++), "legal pad", "1.00", "2.49", new Date(), new Integer(1)},
               {new Integer(count++), "tape", "1.00", "1.49", new Date(), new Integer(1)},
               {new Integer(count++), "stapler", "4.00", "4.49", new Date(), new Integer(1)},
               {new Integer(count++), "Box of Biros", "1.00", "4.99", new Date(), new Integer(2)},
               {new Integer(count++), "Blue Biro", "0.10", "0.14", new Date(), new Integer(1)},
               {new Integer(count++), "legal pad", "1.00", "2.49", new Date(), new Integer(1)},
               {new Integer(count++), "tape", "1.00", "1.49", new Date(), new Integer(1)},
               {new Integer(count++), "stapler", "4.00", "4.49", new Date(), new Integer(1)},
               {new Integer(count++), "Box of Biros", "1.00", "4.99", new Date(), new Integer(2)},
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                    return data[row][col];
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          pages = new ArrayList();
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          int end = ((Integer)page.get(1)).intValue();
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               next_row = printLine(g2, pageFormat, fontMetrics, i, next_row, columnWidths);
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          g2.setFont(footerFont);
          String pageFooter = "Page " + (pageIndex + 1) + " - " + lastPrintDate;
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                         (int)pageFormat.getWidth() / 2 - (fontMetrics.stringWidth(pageFooter) / 2),
                         (int)(pageHeight - fontDescent));
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      * Thus we need to calculate the height of each row and then test how may rows
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          int fontHeight = fontMetrics.getHeight();
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                    if (numLines > maxHeight)
                         maxHeight = numLines;
               prev_row = next_row;
               next_row += (fontHeight * maxHeight);
               // If we've reached the bottom of the page then set the current page's end row
               if (next_row > bottom_of_page)
                    page.add(new Integer(i - 1));
                    pages.add(page);
                    page = new ArrayList();
                    page.add(new Integer(i));
                    pageNum++;
                    next_row = (int)pageFormat.getImageableY()
                                   + fontHeight
                                   + ((int)pageFormat.getHeight() * pageNum)
                                   + headerHeight;
                    bottom_of_page = (int)(pageFormat.getImageableHeight()
                                        + pageFormat.getImageableY())
                                        + ((int)pageFormat.getHeight() * pageNum)
                                        - footerHeight;
                    //Include the current row on the next page, because there is no space on this page
                    i--;
          page.add(new Integer(i - 1));
          pages.add(page);
      * Print the headers or a row from the table to the graphics context
      * Return the position of the row following this one
     public int printLine(Graphics2D g2,
                                   PageFormat pageFormat,
                                   FontMetrics fontMetrics,
                                   int rowNum,
                                   int next_row,
                                   double[] columnWidths)
               throws PrinterException
          int lead = 0;
          int maxHeight = 0;
          for (int j = 0; j < tableView.getColumnCount(); j++)
               String value = null;
               int align = LEFT_ALIGN;
               if (rowNum > -1)
                    Object obj = tableView.getValueAt(rowNum, j);
                    if (obj instanceof Number)
                         align = RIGHT_ALIGN;
                    value = obj.toString();
               else
                    align = CENTER_ALIGN;
                    value = tableView.getColumnName(j);
               int numLines = (int)Math.ceil(fontMetrics.stringWidth(value) / columnWidths[j]);
               if (numLines > maxHeight)
                    maxHeight = numLines;
               if (fontMetrics.stringWidth(value) < columnWidths[j])
                    // Single line
                    int offset = 0;
                    // Work out the offset from the start of the column to display alignment correctly
                    switch (align)
                         case RIGHT_ALIGN: offset = (int)(columnWidths[j] - fontMetrics.stringWidth(value)); break;
                         case CENTER_ALIGN: offset = (int)(columnWidths[j] - fontMetrics.stringWidth(value)) / 2; break;
                         default: offset = 0; break;
                    g2.drawString(value,
                                   lead + (int)(pageFormat.getImageableX() + offset),
                                   next_row);
               else
                    for(int a = 0; a < numLines; a++)
                         //Multi-Line
                         int x = 0;
                         int width = 0;
                         for(x = 0; x < value.length(); x++)
                              width += fontMetrics.charWidth(value.charAt(x));
                              if (width > columnWidths[j])
                                   break;
                         int offset = 0;
                         // Work out the offset from the start of the column to display alignment correctly
                         switch (align)
                              case RIGHT_ALIGN: offset = (int)(columnWidths[j] - fontMetrics.stringWidth(value)); break;
                              case CENTER_ALIGN: offset = (int)(columnWidths[j] - fontMetrics.stringWidth(value)) / 2; break;
                              default: offset = 0; break;
                         g2.drawString(value.substring(0, x),
                                        lead + (int)(pageFormat.getImageableX() + offset),
                                        next_row + (fontMetrics.getHeight() * a));
                         value = value.substring(x);
               lead += columnWidths[j] + cellBuffer;
          // Draw a solid line below the row
          g2.draw(new Line2D.Double(pageFormat.getImageableX(),
                         next_row + (fontMetrics.getHeight() * (maxHeight - 1)) + fontMetrics.getDescent(),
                         pageFormat.getImageableY() + pageFormat.getImageableWidth(),
                         next_row + (fontMetrics.getHeight() * (maxHeight - 1)) + fontMetrics.getDescent()));
          // Return the position of the row following this one
          return next_row + (fontMetrics.getHeight() * maxHeight);
     public static void main(String[] args)
          new Report();
}

Fixed some bugs and added a title. Just pass in a JTable and the class will do the rest.
import javax.swing.*;
import javax.swing.table.*;
import java.awt.print.*;
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import javax.print.*;
import javax.print.attribute.*;
import javax.print.attribute.standard.*;
import java.text.*;
import java.math.*;
public class PrintJTable implements Printable
     private final int LEFT_ALIGN = -1;
     private final int CENTER_ALIGN = 0;
     private final int RIGHT_ALIGN = 1;
     private JFrame m_parent;
     private String m_title;
     private JTable tableView;
     private String lastPrintDate;
     private Font defaultFont;
     private Font headerFont;
     private Font footerFont;
     private int headerHeight;
     private int footerHeight;
     private int cellBuffer = 5;
     private boolean first_pass;
     private ArrayList pages;
     public PrintJTable(JFrame parent, JTable table)
          m_parent = parent;
          tableView = table;
          doPrint();
     public PrintJTable(JFrame parent, String title, JTable table)
          m_parent = parent;
          m_title = title;
          tableView = table;
          doPrint();
      * Reset variables before printing
     private void prepareForPrint()
          pages = new ArrayList();
          first_pass = true;
      * Display a print dialog with some hardcoded defaults
      * The print fonts are also hardcoded
     public void doPrint()
          try
               String jobName = "Java Report";
               defaultFont = new Font("Arial", Font.PLAIN, 8);
               footerFont = new Font("Arial", Font.PLAIN, 6);
               headerFont = new Font("Arial", Font.BOLD, 8);
               PrinterJob prnJob = PrinterJob.getPrinterJob();
               prnJob.setPrintable(this);
               PrintRequestAttributeSet prnSet = new HashPrintRequestAttributeSet();
               prnSet.add(new Copies(1));
               prnSet.add(new JobName(jobName, null));
               prnSet.add(MediaSizeName.ISO_A4);
               PageFormat pf = prnJob.defaultPage();
               pf.setOrientation(java.awt.print.PageFormat.PORTRAIT);
               prnJob.setJobName(jobName);
               PrintService[] services = PrinterJob.lookupPrintServices();
               if (services.length > 0)
                    if (prnJob.printDialog(prnSet))
                          * Get print date
                         String dateFormat = "dd/MM/yyyy HH:mm:ss";
                         DateFormat m_DateFormat = new SimpleDateFormat(dateFormat);
                         lastPrintDate = m_DateFormat.format(new Date()).toString();
                         prepareForPrint();
                         prnJob.print(prnSet);
               else
                    JOptionPane.showMessageDialog(m_parent, "No Printer was found!!", "Printer Error", JOptionPane.ERROR_MESSAGE);
                    return;
          catch (PrinterException e)
               e.printStackTrace();
     public int print(Graphics g, PageFormat pageFormat, int pageIndex) throws PrinterException
           * Check if this is the first time the print method is called for this print action.
           * It is not guaranteed that the print will be called with synchronous pageIndex'es,
           * so we need to calculate the number of pages and which rows appear on which pages.
           * Then the correct page will be printed regardless of which pageIndex is sent through.
          if (first_pass)
               calcPages(g, pageFormat);
          first_pass = false;
          // Stop printing if the pageIndex is out of range
          if (pageIndex >= pages.size())
               return NO_SUCH_PAGE;
          Graphics2D     g2 = (Graphics2D) g;
          g2.setColor(Color.black);
          // The footer will be one line at the bottom of the page, cater for this.
          g2.setFont(footerFont);
          footerHeight = g2.getFontMetrics().getHeight() + g2.getFontMetrics().getDescent();
          g2.setFont(defaultFont);
          FontMetrics fontMetrics = g2.getFontMetrics();
          int fontHeight = fontMetrics.getHeight();
          int fontDescent = fontMetrics.getDescent();
          double pageHeight = pageFormat.getImageableHeight() + pageFormat.getImageableY();
          double pageWidth = pageFormat.getImageableWidth();
          double tableWidth = (double) tableView.getColumnModel().getTotalColumnWidth();
          // Shrink or expand the table to fit the page width
          double scale = (pageWidth - (cellBuffer * tableView.getColumnCount())) / tableWidth;
          // Calculate the width in pixels for each column
          double[] columnWidths = new double[tableView.getColumnCount()];
          double test = 0;
          for(int i = 0; i < tableView.getColumnCount(); i++)
               columnWidths[i] = (double)Math.floor(tableView.getColumnModel().getColumn(i).getWidth() * scale);
               test += columnWidths;
          // Reset the view to the start of the page
          g2.translate(0, 0);
          // Draw a rectangle to see the printable area
          g2.draw3DRect((int)pageFormat.getImageableX(),
                    (int)pageFormat.getImageableY(),
                    (int)pageFormat.getImageableWidth(),
                    (int)pageFormat.getImageableHeight(),
                    false);
          // Calculate the header height
          g2.setFont(headerFont);
          fontMetrics = g2.getFontMetrics();
          // Print the headers and retreive the starting position for the data
          int next_row = (int)pageFormat.getImageableY() + fontMetrics.getHeight();
          if ((m_title != null) && (!m_title.equalsIgnoreCase("")))
               g2.drawString(m_title,
                                   (int)(pageFormat.getImageableX()),
                                   next_row);
               Color current_color = g2.getColor();
               g2.setColor(Color.lightGray);
               int y = next_row + fontMetrics.getDescent();
               g2.draw(new Line2D.Double(pageFormat.getImageableX(),
                              y,
                              (pageFormat.getImageableY() + pageFormat.getImageableWidth()),
                              y));
               g2.setColor(current_color);
               next_row += fontMetrics.getHeight();
          next_row = printLine(g2, pageFormat, fontMetrics, -1, next_row, columnWidths);
          g2.setFont(defaultFont);
          fontMetrics = g2.getFontMetrics();
          // Start printing the detail
          ArrayList page = (ArrayList)pages.get(pageIndex);
          int start = ((Integer)page.get(0)).intValue();
          int end = ((Integer)page.get(1)).intValue();
          for (int i = start; i <= end; i++)
               next_row = printLine(g2, pageFormat, fontMetrics, i, next_row, columnWidths);
          // Print the footer
          g2.setFont(footerFont);
          String pageFooter = "Page " + (pageIndex + 1) + " - " + lastPrintDate;
          g2.drawString(pageFooter,
                         (int)pageFormat.getWidth() / 2 - (fontMetrics.stringWidth(pageFooter) / 2),
                         (int)(pageHeight - fontDescent));
          return PAGE_EXISTS;
     * We can't guarantee that the same amount of rows will be displayed on each page,
     * the row heights are dynamic and may wrap onto 2 or more lines.
     * Thus we need to calculate the height of each row and then test how may rows
     * fit on a specific page. eg. Page 1 contains rows 1 to 10, Page 2 contains rows 11 to 15 etc.
     public void calcPages(Graphics g, PageFormat pageFormat) throws PrinterException
          Graphics2D     g2 = (Graphics2D) g;
          g2.setColor(Color.black);
          // The footer will be one line at the bottom of the page, cater for this.
          g2.setFont(footerFont);
          footerHeight = g2.getFontMetrics().getHeight() + g2.getFontMetrics().getDescent();
          g2.setFont(defaultFont);
          FontMetrics fontMetrics = g2.getFontMetrics();
          int fontHeight = fontMetrics.getHeight();
          int fontDescent = fontMetrics.getDescent();
          double pageHeight = pageFormat.getImageableHeight() - fontHeight;
          double pageWidth = pageFormat.getImageableWidth();
          double tableWidth = (double) tableView.getColumnModel().getTotalColumnWidth();
          // Shrink or expand the table to fit the page width
          double scale = (pageWidth - (cellBuffer * tableView.getColumnCount())) / tableWidth;
          // Calculate the width in pixels for each column
          double[] columnWidths = new double[tableView.getColumnCount()];
          for(int i = 0; i < tableView.getColumnCount(); i++)
               columnWidths[i] = (double)Math.floor(tableView.getColumnModel().getColumn(i).getWidth() * scale);
          // Calculate the header height
          int maxHeight = 0;
          g2.setFont(headerFont);
          fontMetrics = g2.getFontMetrics();
          headerHeight = 0;
          if ((m_title != null) && (!m_title.equalsIgnoreCase("")))
               headerHeight = fontMetrics.getHeight();
          for (int j = 0; j < tableView.getColumnCount(); j++)
               String value = tableView.getColumnName(j).toString();
               int numLines = (int)Math.ceil(fontMetrics.stringWidth(value) / columnWidths[j]);
               if (numLines > maxHeight)
                    maxHeight = numLines;
          headerHeight += g2.getFontMetrics().getHeight() * maxHeight;
          g2.setFont(defaultFont);
          fontMetrics = g2.getFontMetrics();
          int pageNum = 0;
          int bottom_of_page = (int)(pageFormat.getImageableHeight() + pageFormat.getImageableY()) - footerHeight;
          int prev_row = 0;
          int next_row = (int)pageFormat.getImageableY() + fontHeight + headerHeight;
          int i = 0;
          ArrayList page = new ArrayList();
          page.add(new Integer(0));
          for (i = 0; i < tableView.getRowCount(); i++)
               maxHeight = 0;
               for (int j = 0; j < tableView.getColumnCount(); j++)
                    String value = formatObject(tableView.getValueAt(i, j));
                    int numLines = (int)Math.ceil(fontMetrics.stringWidth(value) / columnWidths[j]);
                    if (numLines > maxHeight)
                         maxHeight = numLines;
               prev_row = next_row;
               next_row += (fontHeight * maxHeight);
               // If we've reached the bottom of the page then set the current page's end row
               if (next_row > bottom_of_page)
                    page.add(new Integer(i - 1));
                    pages.add(page);
                    page = new ArrayList();
                    page.add(new Integer(i));
                    pageNum++;
                    next_row = (int)pageFormat.getImageableY()
                                   + fontHeight
                                   + ((int)pageFormat.getHeight() * pageNum)
                                   + headerHeight;
                    bottom_of_page = (int)(pageFormat.getImageableHeight()
                                        + pageFormat.getImageableY())
                                        + ((int)pageFormat.getHeight() * pageNum)
                                        - footerHeight;
                    //Include the current row on the next page, because there is no space on this page
                    i--;
          page.add(new Integer(i - 1));
          pages.add(page);
     * Print the headers or a row from the table to the graphics context
     * Return the position of the row following this one
     public int printLine(Graphics2D g2,
                                   PageFormat pageFormat,
                                   FontMetrics fontMetrics,
                                   int rowNum,
                                   int next_row,
                                   double[] columnWidths)
               throws PrinterException
          int lead = 0;
          int maxHeight = 0;
          for (int j = 0; j < tableView.getColumnCount(); j++)
               String value = null;
               int align = LEFT_ALIGN;
               if (rowNum > -1)
                    Object obj = tableView.getValueAt(rowNum, j);
                    if (obj instanceof Number)
                         align = RIGHT_ALIGN;
                    value = formatObject(obj);
               else
                    //align = CENTER_ALIGN;
                    value = tableView.getColumnName(j);
               int numLines = (int)Math.ceil(fontMetrics.stringWidth(value) / columnWidths[j]);
               if (numLines > maxHeight)
                    maxHeight = numLines;
               if (fontMetrics.stringWidth(value) < columnWidths[j])
                    // Single line
                    int offset = 0;
                    // Work out the offset from the start of the column to display alignment correctly
                    switch (align)
                         case RIGHT_ALIGN: offset = (int)(columnWidths[j] - fontMetrics.stringWidth(value)); break;
                         case CENTER_ALIGN: offset = (int)(columnWidths[j] - fontMetrics.stringWidth(value)) / 2; break;
                         default: offset = 0; break;
                    g2.drawString(value,
                                   lead + (int)(pageFormat.getImageableX() + offset),
                                   next_row);
               else
                    for(int a = 0; a < numLines; a++)
                         //Multi-Line
                         int x = 0;
                         int width = 0;
                         for(x = 0; x < value.length(); x++)
                              width += fontMetrics.charWidth(value.charAt(x));
                              if (width > columnWidths[j])
                                   break;
                         int offset = 0;
                         // Work out the offset from the start of the column to display alignment correctly
                         switch (align)
                              case RIGHT_ALIGN: offset = (int)(columnWidths[j] - fontMetrics.stringWidth(value.substring(0, x))); break;
                              case CENTER_ALIGN: offset = (int)(columnWidths[j] - fontMetrics.stringWidth(value.substring(0, x))) / 2; break;
                              default: offset = 0; break;
                         g2.drawString(value.substring(0, x),
                                        lead + (int)(pageFormat.getImageableX() + offset),
                                        next_row + (fontMetrics.getHeight() * a));
                         value = value.substring(x);
               lead += columnWidths[j] + cellBuffer;
          // Draw a solid line below the row
          Color current_color = g2.getColor();
          g2.setColor(Color.lightGray);
          int y = next_row + (fontMetrics.getHeight() * (maxHeight - 1)) + fontMetrics.getDescent();
          g2.draw(new Line2D.Double(pageFormat.getImageableX(),
                         y,
                         (pageFormat.getImageableY() + pageFormat.getImageableWidth()),
                         y));
          g2.setColor(current_color);
          // Return the position of the row following this one
          return next_row + (fontMetrics.getHeight() * maxHeight);
     public String formatObject(Object obj)
          String value = (obj == null) ? "" : obj.toString();
          return value;

Print JTable with row headers

I am using the fancy new printing capablities in java 1.5 to print my JTable and wow is it ever slick!
PrintRequestAttributeSet set = new HashPrintRequestAttributeSet();
set.add(OrientationRequested.LANDSCAPE);
this.matrixJTable.print(JTable.PrintMode.NORMAL, null, null, true, set, false);Its just that easy. Way to go sun!
The one problem that I am encountering is that my row headers don't print. The problem is that JTables don't support row headers, you have to use a JScrollPane for that.
I need a way to print my JTable so that the row headers show up in the printout... and hopefully still use the warm and fuzzy new printing capabilities of JTable printing in java 1.5.
(ps/ Isn't it time to add row header support to JTables?)

The problem is that JTables don't support row headers, you have to use a JScrollPane for that.Well technically JTable's don't really support column headers either. It is a seperate component (JTableHeader). A JTable will automatically add its table header to the table header area of a JScrollPane. (but you don't have to use a jscrollpane to see the column headers, it is just the quickest and easiest way).
Really shouldn't be hard to implement a row header and manually add it to the scroll panes row header area or use a BorderLayout and put your row header in the WEST and put your table in the CENTER if you don't want a scroll pane.
Of course this won't help you with your printing issue.

Printing JTable with DefaultTableCellRenderer (or JLabel's)

Hi there,
I am trying to print a JTable by having it implement the Printable interface. It works, but it works only because I use the string values from the renderers of the cells. This works fine if its just simple left alligned strings.
But when you are using formatted text strings for instance (in a DefaultTableCellRenderer extension) or something that represents a boolean (a checkbox), it doesn't look very good. Bad actually. I tried to use the print method on the renderer or cast them first to a JComponent or JLabel and then use the print method. No success so far. Can anybody help me? I am quit desperate right now.
Kind regards,
Ren�

Yes I can. I took the print method from the class in which I implemented it (the JTable is a member of that particular class):
* Implementing the Printable interface.
* For printing the same font is used as is used on the screen.
* So, no special print font is used or can be choosen at this
* point. Also the font size is taken from the table on screen.
* The title font is twice the font size of the normal font, but
* bold. The column headers have the same font as the normal font
* but also bold like the title.
* The height we'll be using for a line of text will be 1.5 times
* the average height in this font, with a minimum of 10.
* The title font, the table header font and the table content font
* are all the same (unlike the table) and based on the table font.
* The table header font is not used.
* If the table does not fit on paper, one could adjust the orientation
* of the paper in the paper dialog, or adjust the distance bewtween
* the columns on the screen as the column width on the screen is
* taken to the paper.
public int print(Graphics pg, PageFormat pageFormat, int pageIndex) throws PrinterException {
if (pageIndex >= m_maxNumPage) {
return NO_SUCH_PAGE;
// This is for anti aliasing.
Graphics2D g2d = null;
if (pg instanceof Graphics2D) {
g2d = (Graphics2D) pg;
g2d.addRenderingHints(new RenderingHints(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON));
g2d.addRenderingHints(new RenderingHints(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON));
pg.translate((int) pageFormat.getImageableX(), (int) pageFormat.getImageableY());
int wPage = (int) pageFormat.getImageableWidth();
int hPage = (int) pageFormat.getImageableHeight();
// This will make sure no printing is
// done outside the designated area.
pg.setClip(0, 0, wPage, hPage);
// Forget this: its a test (works fine though).
//table.print(g2d);
//if (true)
// return PAGE_EXISTS;
int y = 0;
// Make the title font size twice the size of the regular font size.
pg.setFont(this.table.getFont().deriveFont(Font.BOLD, (this.table.getFont().getSize() * 2)));
pg.setColor(Color.black);
FontMetrics fm = pg.getFontMetrics();
y += fm.getAscent();
// Draw the title, the date and the page number.
pg.drawString(pageTitle + " " + DateFormat.getDateInstance(DateFormat.MEDIUM, this.locale).format(new Date(System.currentTimeMillis())) + " (" + (pageIndex + 1) + ") ", 0, y);
//          pg.drawString(pageTitle + " " + DateFormat.getDateInstance().format(new Date(System.currentTimeMillis())) + " (" + (pageIndex + 1) + ") ", 0, y);
y += 20; // space between title and table headers
// The font for the table headers.
Font headerFont = this.table.getTableHeader().getFont();
pg.setFont(headerFont);
fm = pg.getFontMetrics();
TableColumnModel colModel = this.table.getColumnModel();
int nColumns = colModel.getColumnCount();
int x[] = new int[nColumns];
x[0] = 0;
int h = fm.getAscent();
// Add ascent of header font because of baseline positioning.
y += h;
int nRow, nCol;
// Draw the COLUMN HEADERS.
for (nCol = 0; nCol < nColumns; nCol++) {
TableColumn tk = colModel.getColumn(nCol);
int width = tk.getWidth();
String title = (String) tk.getIdentifier();
// The x offset for each column stored.
if (nCol + 1 < nColumns) {
x[nCol + 1] = x[nCol] + width;
// If this is not the last column header, calculated
// how many characters can be printed, based on the
// width of the column being printed.
if ((nCol < (nColumns - 1)) && title.length() > 0) {
//if (x[nCol] + width <= wPage) {
for (int i = title.length(); i >= 0; i--) {
if ((fm.stringWidth(title.substring(0, i))) <= width) {
// Adjust the colum header for the space available (the width).
title = title.substring(0, i);
break;
// Draw the column header.
pg.drawString(title, x[nCol], y);
pg.setFont(this.table.getFont());
fm = pg.getFontMetrics();
int header = y;
// Gets the standard height of a line of text in this font.
// This is the distance between the baseline of adjacent lines of text.
// It is the sum of the leading + ascent + descent. There is no guarantee
// that lines of text spaced at this distance are disjoint; such lines may
// overlap if some characters overshoot either the standard ascent or the
// standard descent metric.
h = fm.getHeight();
// Calculate the ACTUAL height we'll be using for a line of text.
// That would be 1.5 times the average height, with a minimum of 10.
// Actually, normally, the average height should suffice. But we're
// not taking any risks here.
int rowHeight = Math.max((int) (h * 1.5), 10);
// Calculate how many rows fit on a page.
int rowPerPage = (hPage - header) / rowHeight;
m_maxNumPage = Math.max((int) Math.ceil(this.table.getRowCount() / (double) rowPerPage), 1);
int iniRow = pageIndex * rowPerPage;
int endRow = Math.min(this.table.getRowCount(), iniRow + rowPerPage);
String cell = null;
// Draw every ROW.
for (nRow = iniRow; nRow < endRow; nRow++) {
y += rowHeight;
// Draw each CELL in each ROW.
for (nCol = 0; nCol < nColumns; nCol++) {
cell = null;
int col = this.table.getColumnModel().getColumn(nCol).getModelIndex();
// Get the cell object. This is the object that needs to be printed.
Object object = model.getValueAt(nRow, col);
// RENDERING FOR PRINTING! Here is determined for the printing how the rendering is done.
// If a special renderer had been set an attempt is made to use that renderer (e.g. get the text).
// If that is not possible, simple rendering: the toString() value.
// BE AWARE! The format for numbers, booleans etc. might require better code.
if (table.getColumnModel().getColumn(nCol).getCellRenderer() != null) {
if (table.getColumnModel().getColumn(nCol).getCellRenderer().getTableCellRendererComponent(table, object, false, false, nRow, nCol) != null) {
if (table.getColumnModel().getColumn(nCol).getCellRenderer().getTableCellRendererComponent(table, object, false, false, nRow, nCol) instanceof JLabel) {
cell = ((JLabel) table.getColumnModel().getColumn(nCol).getCellRenderer().getTableCellRendererComponent(table, object, false, false, nRow, nCol)).getText();
//table.getCellRenderer(0, nCol).getTableCellRendererComponent(table, object, false, false, 0, nCol).paint(g2d);
// Object fiets = table.getCellRenderer(0, nCol).getTableCellRendererComponent(table, object, false, false, 0, nCol);
// if (fiets instanceof DefaultTableCellRenderer) {
//      System.out.println("DefaultTableCellRenderer!" + nCol);
//      ((DefaultTableCellRenderer) fiets).print(pg);
// If the object is a Boolean, print an "X" or an "O".
if (object instanceof Boolean) {
cell = (((Boolean) object).equals(new Boolean(true)) ? "X" : "O");
// Still don't know how to print it? Use the object's toString() method.
// This is probably used in most cases anyway!
if (cell == null && object != null) {
//cell = object.toString();
if (cell == null) {
cell = "";
// If this is not the last column, calculated how many
// characters can be printed, based on the width of
// the column being printed.
if ((nCol < (nColumns - 1)) && cell.length() > 0) {
int width = colModel.getColumn(nCol).getWidth();
for (int i = cell.length(); i >= 0; i--) {
if ((fm.stringWidth(cell.substring(0, i))) <= width) {
// Adjust the size.
cell = cell.substring(0, i);
break;
// Print the cell.
pg.drawString(cell, x[nCol], y);
System.gc();
return PAGE_EXISTS;
}

JTable with row header plus value extraction from headers

Hi, I am trying to do the following:
Short Version-
1. Create a table that has both row and column headers
2. Allow the user to mouse over any of these headers such that doing so will display an image I have produced on a panel. (I already know how to create the image and how to display it, I'm just not sure how to associate it with a particular row or column header)
3. Make the row headers look as much as possible like the column headers.
Slightly Longer Version-
Column headers will be labled A-H (maximum) while row headers will be labled 1-12 (maximum). Either can be less, however, depending on user input. After the table has been realized, the user will move the mouse over say, header 'H' and when they do, a JPEG image will appear on another panel and a tooltip will appear above the cell showing a formula. This happens when either row or column headers are moused over.
Currently, I am using the following code from the O'reilly Swing book as a baseline for experimentation but any help you can offer will be appreciated. I'm fairly new to the JTable world... :-(
TableModel tm = new AbstractTableModel(){
               String data[] = {"", "a", "b", "c", "d", "e"};
               String headers [] = {"Row #", "Column1", "Column2", "Column3", "Column4", "Column5"};
               public int getColumnCount(){ return data.length;}
               public int getRowCount() { return 1000;}
               public String getColumnName(int col){ return headers[col];}
               public Object getValueAt(int row, int col){
                    return data[col] + row;
          //creates a column model for the main table. This model ignores the first
          //column added and sets a minimum width of 150 pixels for all others
          TableColumnModel cm = new DefaultTableColumnModel(){
               boolean first = true;
               public void addColumn(TableColumn tc){
                    if(first) {first = false; return;}
                    tc.setMinWidth(150);
                    super.addColumn(tc);
          //Creates a column model that will serve as the row header table. This model
          //picks a maxium width and stores only the first column
          TableColumnModel rowHeaderModel = new DefaultTableColumnModel(){
               boolean first = true;
               public void addColumn(TableColumn tc){
                    if(first) {
                         tc.setMaxWidth(tc.getPreferredWidth());
                         super.addColumn(tc);
                         first = false;
          JTable grid = new JTable(tm, cm);
          //set up the header column and hook it up to everything
          JTable headerColumn = new JTable(tm, rowHeaderModel);
          grid.createDefaultColumnsFromModel();
          headerColumn.createDefaultColumnsFromModel();
          //make sure the selection between the main table and the header stay in sync
          grid.setSelectionModel(headerColumn.getSelectionModel());
          headerColumn.setBorder(BorderFactory.createEtchedBorder());
          headerColumn.setBackground(Color.lightGray);
          headerColumn.setColumnSelectionAllowed(false);
          headerColumn.setCellSelectionEnabled(false);
          JViewport jv = new JViewport();
          jv.setView(headerColumn);
          jv.setPreferredSize(headerColumn.getMaximumSize());
          //to make the table scroll properly
          grid.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
          //have to manually attach row headers but after that, the scroll pane
          //keeps them in sync
          JScrollPane jsp = new JScrollPane(grid);
          jsp.setRowHeader(jv);
          jsp.setCorner(ScrollPaneConstants.UPPER_LEFT_CORNER, headerColumn.getTableHeader());
          gridPanel.add(jsp, BorderLayout.NORTH);

There a number of nice examples on JTable: http://www.senun.com/Left/Programming/Java_old/Examples_swing/SwingExamples.html
Hope you could find something suitable ...
Regards,
Anton.

Internal Table to Excel with Column Header line

Hello everyone,
I need to download Internal table data to excel with a column header line.
My Code is as follows:
TYPES: BEGIN OF y_hdr,
        head(30) TYPE c,
        END OF y_hdr.
Data: t_hdr TYPE STANDARD TABLE OF y_hdr.
Fill internal table t_adrcdata
fill the header table t_hdr
    CALL FUNCTION 'GUI_DOWNLOAD'
      EXPORTING
        filename                      = C:\test.xls
        filetype                        = 'DBF'
    IMPORTING
      TABLES
        data_tab                        = t_adrcdata
       fieldnames                       = t_hdr
     EXCEPTIONS
       file_write_error                = 1
       no_batch                        = 2
This code gives me a row with column headers.
However they are all truncated after 10 chars.
The truncation is independent of column data length. Data could be of length 2,5 or 40 but the header always displays upto 10 chars.
Keeping the filename as test.xls, when I download it in ASC format instead of DBF the headers are of proper length.
What could I be doing wrong?
I know this topic has been discussed before but my question is pertaining to DBF Format download. The reason I chose DBF format is because it downloads the data in DB format and does not give in to Excel formatting.
FOr example in ASC format:
1, A field of type Char(12) used to get downloaded into excel without the leading zeros. 000012345678 --> 12345678
2. Date in format dd-MMM-yyyy in a char(11) field used to get downloaded to excel in dd-MMM-yy format.
When I chose DBF, this issue was resolved. However, the column headers got truncated at 10 chars.
Please feel free to recommend any other way of downloading to Excel and preserving format if this method is incorrect/ there is a better way.

Hi,
Take 'ASC' format for file type.
But when you declare your internal table to pass for FM you have to create all the fields with char.
Example:
data: begin of it_exl occurs 0,
        bukrs(04) type c,
        belnr(10) type c,
        buzei(03) type c,
end of ut_exl.
You need to manipulate your date format and other stuff before appending to this internal table.
Thanks,
Deepak.

JTable with Groupable Header

Hi again, Im have problems with a JTable supporting Groupable Header
check this code please:
public class GroupableHeaderExample extends JFrame {
GroupableHeaderExample() {
    super( "Groupable Header Example" );
    DefaultTableModel dm = new DefaultTableModel();
    dm.setDataVector(new Object[][]{
      {"119","foo","bar","ja","ko","zh"},
      {"911","bar","foo","en","fr","pt"}},
    new Object[]{"SNo.","1","2","Native","2","3"});
    JTable table = new JTable( dm ) {
      protected JTableHeader createDefaultTableHeader() {
     return new GroupableTableHeader(columnModel);
    TableColumnModel cm = table.getColumnModel();
    ColumnGroup g_name = new ColumnGroup("Name");
    g_name.add(cm.getColumn(1));
    g_name.add(cm.getColumn(2));
    ColumnGroup g_lang = new ColumnGroup("Language");
    g_lang.add(cm.getColumn(3));
    ColumnGroup g_other = new ColumnGroup("Others");
    g_other.add(cm.getColumn(4));
    g_other.add(cm.getColumn(5));
    g_lang.add(g_other);
    GroupableTableHeader header = (GroupableTableHeader)table.getTableHeader();
    header.addColumnGroup(g_name);
    header.addColumnGroup(g_lang);
    JScrollPane scroll = new JScrollPane( table );
    getContentPane().add( scroll );
    setSize( 400, 120 );
}it could be like this :
* |-----------------------------------------------------|
* |        |       Name      |         Language         |
* |        |-----------------|--------------------------|
* | SNo. |        |        |        |      Others     |
* |        |   1    |    2   | Native |-----------------|
* |        |        |        |        |   2    |   3    |
* |-----------------------------------------------------|
* |        |        |        |        |        |        |
*/but it is looking like this:
* |-----------------------------------------------------|
* | SNo. |   1    |    2   | Native |   2    |   3    |
* |-----------------------------------------------------|
* |        |        |        |        |        |        |
*/its look like correct, but i think the problem is in one of the clases called. what do you think? ... thanks
Message was edited by:
iTzAngel
Message was edited by:
iTzAngel

STOP SPAMMING THE FORUMS!
http://forum.java.sun.com/thread.jspa?threadID=5202466
http://forum.java.sun.com/thread.jspa?threadID=5202411
http://forum.java.sun.com/thread.jspa?threadID=5202439
http://forum.java.sun.com/thread.jspa?threadID=5202369
by the way, you are really spamming the forums

Print JTable with column heading

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