How to print the data in the grid?

Question

Hi all,
I'm new to java. So, I need some helps.
I want to print the data in the grid. Data could be more than one page. But I have no idea how to start writing code.
Please let me know if you know.
Thank you.
DT.

Answer 1

Follow this steps.
1- the Grid which you wish to print must locate in a class which implements Printable() interface.
e.g.
import javax.swing.table.*;
import java.awt.print.*;
import javax.infobus.*;
public class myGridControl extends GridControl implements Printable{
// add the following statements in the definition section of your class
int m_maxNumPage =1;
JTable m_table;
TableModel m_tableModel;
ScrollableRowsetAccess myRs;
// add the folowing statemnts in the
//constructor or init method or start method
//(Notice:if you couldn't print, possible
//you didn't put these stetment on the right
//location and one or all of them
//are "null".change the location and make
//sure they are not null when you issue a
//print order)
m_table = new JTable();
m_table = masterGrid.getTable();
m_tableModel = m_table.getModel();
myRs = (ScrollableRowsetAccess)masterGrid.getDataItem();
3- add following methods to your class(myGridControl). just cut and paste.
// Print Methods
public void printData() {
try {
PrinterJob prnJob = PrinterJob.getPrinterJob();
prnJob.setPrintable(this);
if (!prnJob.printDialog())
return;
prnJob.print();
catch (PrinterException e) {
e.printStackTrace();
System.err.println("Printing error: "+e.toString());
public int print(Graphics pg, PageFormat pageFormat,int pageIndex) throws PrinterException {
JLabel m_title=new JLabel("Alexus Report : "+titleName);
if (pageIndex >= m_maxNumPage)
return NO_SUCH_PAGE;
pg.translate((int)pageFormat.getImageableX(),
(int)pageFormat.getImageableY());
int wPage = 0;
int hPage = 0;
if (pageFormat.getOrientation() == pageFormat.PORTRAIT) {
wPage = (int)pageFormat.getImageableWidth();
hPage = (int)pageFormat.getImageableHeight();
else {
wPage = (int)pageFormat.getImageableWidth();
wPage += wPage/2;
hPage = (int)pageFormat.getImageableHeight();
pg.setClip(0,0,wPage,hPage);
int y = 0;
pg.setFont(m_title.getFont());
pg.setColor(Color.black);
Font fn = pg.getFont();
FontMetrics fm = pg.getFontMetrics();
y += fm.getAscent();
pg.drawString(m_title.getText(), 0, y);
y += 20; // space between title and table headers
Font headerFont = m_table.getFont().deriveFont(Font.BOLD);
pg.setFont(headerFont);
fm = pg.getFontMetrics();
TableColumnModel colModel = m_table.getColumnModel();
int nColumns = colModel.getColumnCount();
int x[] = new int[nColumns];
x[0] = 0;
int h = fm.getAscent();
y += h; // add ascent of header font because of baseline
// positioning (see figure 2.10)
int nRow, nCol;
for (nCol=0; nCol<nColumns; nCol++) {
TableColumn tk = colModel.getColumn(nCol);
int width = tk.getWidth();
if (x[nCol] + width > wPage) {
nColumns = nCol;
break;
if (nCol+1<nColumns)
x[nCol+1] = x[nCol] + width;
String title = (String)tk.getIdentifier();
pg.drawString(title, x[nCol], y);
pg.setFont(m_table.getFont());
fm = pg.getFontMetrics();
int header = y;
h = fm.getHeight();
int rowH = Math.max((int)(h*1.5), 10);
int rowPerPage = (hPage-header)/rowH;
m_maxNumPage = Math.max((int)Math.ceil(m_table.getRowCount()/
(double)rowPerPage), 1);
int iniRow = pageIndex*rowPerPage;
int endRow = Math.min(m_table.getRowCount(),
iniRow+rowPerPage);
// take an array to store columns header
String colNames[] = new String[nColumns];
for (nCol=0; nCol<nColumns; nCol++) {
colNames[nCol] = myRs.getColumnName(nCol+1).toString();
try{
for (nRow=iniRow; nRow<endRow; nRow++) {
y += h;
// set RowSet on the specific row
myRs.absolute(nRow+1);
for (nCol=0; nCol<nColumns; nCol++) {
/* the next 3 lines are old code
int col = m_table.getColumnModel().getColumn(nCol).getModelIndex();
Object obj = m_tableModel.getValueAt(nRow, col);
String str = obj.toString();
// take the values column by columns
ImmediateAccess ia = (ImmediateAccess)myRs.getColumnItem(colNames[nCol]);
String str = ia.getValueAsString();
if (str.equals("")) str=" ";
/* this if is usefull if we'd like to have coloring in printing
if (obj instanceof ColorData)
pg.setColor(((ColorData)obj).m_color);
else
pg.setColor(Color.black);
pg.drawString(str, x[nCol], y);
}catch(Exception e){
e.printStackTrace();
System.gc();
return PAGE_EXISTS;
public void printData() {
try {
PrinterJob prnJob = PrinterJob.getPrinterJob();
prnJob.setPrintable(this);
if (!prnJob.printDialog())
return;
prnJob.print();
catch (PrinterException e) {
e.printStackTrace();
System.err.println("Printing error: "+e.toString());
public int print(Graphics pg, PageFormat pageFormat,int pageIndex) throws PrinterException {
JLabel m_title=new JLabel("Alexus Report : "+titleName);
if (pageIndex >= m_maxNumPage)
return NO_SUCH_PAGE;
pg.translate((int)pageFormat.getImageableX(),
(int)pageFormat.getImageableY());
int wPage = 0;
int hPage = 0;
if (pageFormat.getOrientation() == pageFormat.PORTRAIT) {
wPage = (int)pageFormat.getImageableWidth();
hPage = (int)pageFormat.getImageableHeight();
else {
wPage = (int)pageFormat.getImageableWidth();
wPage += wPage/2;
hPage = (int)pageFormat.getImageableHeight();
pg.setClip(0,0,wPage,hPage);
int y = 0;
pg.setFont(m_title.getFont());
pg.setColor(Color.black);
Font fn = pg.getFont();
FontMetrics fm = pg.getFontMetrics();
y += fm.getAscent();
pg.drawString(m_title.getText(), 0, y);
y += 20; // space between title and table headers
Font headerFont = m_table.getFont().deriveFont(Font.BOLD);
pg.setFont(headerFont);
fm = pg.getFontMetrics();
TableColumnModel colModel = m_table.getColumnModel();
int nColumns = colModel.getColumnCount();
int x[] = new int[nColumns];
x[0] = 0;
int h = fm.getAscent();
y += h; // add ascent of header font because of baseline
// positioning (see figure 2.10)
int nRow, nCol;
for (nCol=0; nCol<nColumns; nCol++) {
TableColumn tk = colModel.getColumn(nCol);
int width = tk.getWidth();
if (x[nCol] + width > wPage) {
nColumns = nCol;
break;
if (nCol+1<nColumns)
x[nCol+1] = x[nCol] + width;
String title = (String)tk.getIdentifier();
pg.drawString(title, x[nCol], y);
pg.setFont(m_table.getFont());
fm = pg.getFontMetrics();
int header = y;
h = fm.getHeight();
int rowH = Math.max((int)(h*1.5), 10);
int rowPerPage = (hPage-header)/rowH;
m_maxNumPage = Math.max((int)Math.ceil(m_table.getRowCount()/
(double)rowPerPage), 1);
int iniRow = pageIndex*rowPerPage;
int endRow = Math.min(m_table.getRowCount(),
iniRow+rowPerPage);
// take an array to store columns header
String colNames[] = new String[nColumns];
for (nCol=0; nCol<nColumns; nCol++) {
colNames[nCol] = myRs.getColumnName(nCol+1).toString();
try{
for (nRow=iniRow; nRow<endRow; nRow++) {
y += h;
// set RowSet on the specific row
myRs.absolute(nRow+1);
for (nCol=0; nCol<nColumns; nCol++) {
/* the next 3 lines are old code
int col = m_table.getColumnModel().getColumn(nCol).getModelIndex();
Object obj = m_tableModel.getValueAt(nRow, col);
String str = obj.toString();
// take the values column by columns
ImmediateAccess ia = (ImmediateAccess)myRs.getColumnItem(colNames[nCol]);
String str = ia.getValueAsString();
if (str.equals("")) str=" ";
/* this if is usefull if we'd like to have coloring in printing
if (obj instanceof ColorData)
pg.setColor(((ColorData)obj).m_color);
else
pg.setColor(Color.black);
pg.drawString(str, x[nCol], y);
}catch(Exception e){
e.printStackTrace();
System.gc();
return PAGE_EXISTS;
4- execute printData() method to print.
e.g. myGridControl.printData();
let me know if you still cannot print.
Ali