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How do you make a table column cell's contents bold?
I have a JTable, and I want to make one of the columns' contents to be bold. How do I do that? Should I customize the TableCellRenderer? How do I do it?
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This is an example of a table cell renderer. It extends the DefaultTableCellRenderer. What it does is
to set a cell's font to bold.
class MyTableCellRenderer extends DefaultTableCellRenderer {
public Component getTableCellRendererCompon
JTable table, Object value, boolean isSelected,
boolean hasFocus, int row, int column) {
setOpaque(true);
setText(value.toString());
// set to desired font
setFont(new Font("Courier", Font.BOLD, 13));
// set cell's foreground to default cell foreground color
setForeground(table.getFor
// if cell is selected, set background color to default cell selection background color
if (isSelected) {
setBackground(table.getSel
}
// otherwise, set cell background color to white
else {
setBackground(table.white)
}
// draw border on cell if it has focus
if (hasFocus) {
setBorder( UIManager.getBorder("Table
}
// position cell text at center
setHorizontalAlignment(Swi
return this;
}
}
As an example of its use, first we create an instance of our table cell renderer:
MyTableCellRenderer tableCellRenderer = new MyTableCellRenderer();
Then we set the renderer to the first column in the table:
TableColumn tableColumn = myTable.getColumnModel().g
// set our own table cell renderer for this column
tableColumn.setCellRendere
to set a cell's font to bold.
class MyTableCellRenderer extends DefaultTableCellRenderer {
public Component getTableCellRendererCompon
JTable table, Object value, boolean isSelected,
boolean hasFocus, int row, int column) {
setOpaque(true);
setText(value.toString());
// set to desired font
setFont(new Font("Courier", Font.BOLD, 13));
// set cell's foreground to default cell foreground color
setForeground(table.getFor
// if cell is selected, set background color to default cell selection background color
if (isSelected) {
setBackground(table.getSel
}
// otherwise, set cell background color to white
else {
setBackground(table.white)
}
// draw border on cell if it has focus
if (hasFocus) {
setBorder( UIManager.getBorder("Table
}
// position cell text at center
setHorizontalAlignment(Swi
return this;
}
}
As an example of its use, first we create an instance of our table cell renderer:
MyTableCellRenderer tableCellRenderer = new MyTableCellRenderer();
Then we set the renderer to the first column in the table:
TableColumn tableColumn = myTable.getColumnModel().g
// set our own table cell renderer for this column
tableColumn.setCellRendere
package suncertify.gui;
import java.io.*;
import java.util.*;
import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
/**
* This class renderers how JTableHeaders will look like
* i used JList as a rendering component to split it on two lines the
* headers in case there were more then one word in a header.
*/
public class HeaderRenderer extends JList implements TableCellRenderer {
public HeaderRenderer() {
setOpaque(true);
setForeground(UIManager.ge
setBackground(UIManager.ge
setBorder(UIManager.getBor
ListCellRenderer renderer = getCellRenderer();
((JLabel)renderer).setHori
setCellRenderer(renderer);
}
public Component getTableCellRendererCompon
boolean isSelected, boolean hasFocus, int row, int column) {
setFont(table.getFont());
String str = (value == null) ? "" : value.toString();
BufferedReader br = new BufferedReader(new StringReader(str));
String line;
Vector v = new Vector();
try {
while ((line = br.readLine()) != null) {
v.addElement(line);
}
} catch (IOException ex) {
ex.printStackTrace();
}
setListData(v);
return this;
}
}
import java.io.*;
import java.util.*;
import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
/**
* This class renderers how JTableHeaders will look like
* i used JList as a rendering component to split it on two lines the
* headers in case there were more then one word in a header.
*/
public class HeaderRenderer extends JList implements TableCellRenderer {
public HeaderRenderer() {
setOpaque(true);
setForeground(UIManager.ge
setBackground(UIManager.ge
setBorder(UIManager.getBor
ListCellRenderer renderer = getCellRenderer();
((JLabel)renderer).setHori
setCellRenderer(renderer);
}
public Component getTableCellRendererCompon
boolean isSelected, boolean hasFocus, int row, int column) {
setFont(table.getFont());
String str = (value == null) ? "" : value.toString();
BufferedReader br = new BufferedReader(new StringReader(str));
String line;
Vector v = new Vector();
try {
while ((line = br.readLine()) != null) {
v.addElement(line);
}
} catch (IOException ex) {
ex.printStackTrace();
}
setListData(v);
return this;
}
}
remove this line.
package suncertify.gui;
package suncertify.gui;
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sorry i didnt read whatyou needed clearly, this should work.
import java.io.*;
import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
/**
* This class renderers how JTableHeaders will look like
* i used JList as a rendering component to split it on two lines the
* headers in case there were more then one word in a header.
*/
public class HeaderRenderer extends JLabel implements TableCellRenderer {
public HeaderRenderer() {
setOpaque(true);
setForeground(UIManager.ge
setBackground(UIManager.ge
setBorder(UIManager.getBor
ListCellRenderer renderer = getCellRenderer();
((JLabel)renderer).setHori
setCellRenderer(renderer);
}
public Component getTableCellRendererCompon
boolean isSelected, boolean hasFocus, int row, int column) {
setFont(table.getFont());
String str = (value == null) ? "" : value.toString();
setText("<html><head></hea
return this;
}
}
import java.io.*;
import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
/**
* This class renderers how JTableHeaders will look like
* i used JList as a rendering component to split it on two lines the
* headers in case there were more then one word in a header.
*/
public class HeaderRenderer extends JLabel implements TableCellRenderer {
public HeaderRenderer() {
setOpaque(true);
setForeground(UIManager.ge
setBackground(UIManager.ge
setBorder(UIManager.getBor
ListCellRenderer renderer = getCellRenderer();
((JLabel)renderer).setHori
setCellRenderer(renderer);
}
public Component getTableCellRendererCompon
boolean isSelected, boolean hasFocus, int row, int column) {
setFont(table.getFont());
String str = (value == null) ? "" : value.toString();
setText("<html><head></hea
return this;
}
}
To Marine: please read the guideline below on proposing answers. The questioner wants the cells in a JTable columns to be bold. Your solution is for a JTable header.
darn didnt pay attention sorry reject my proposal.
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A request has been made to delete this question. If there are no objections within 72 hours, the request will be granted.
Netminder
EE Admin
Netminder
EE Admin
Why delete? Is the questioner not happy with the solution I provided?
yongsing,
I will assume that's an objection. The request will be denied, and this question will be closed either by the Asker's accepting a comment, or by the Moderators during the normal cleanup procedure.
EXPERTS: Please leave your recommendations for resolving this question here.
Netminder
EE Admin
I will assume that's an objection. The request will be denied, and this question will be closed either by the Asker's accepting a comment, or by the Moderators during the normal cleanup procedure.
EXPERTS: Please leave your recommendations for resolving this question here.
Netminder
EE Admin
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yongsing
sanjay_thakur provided that solution before you, so I will force-accept his comment within the next 72 hours.
** Mindphaser - Community Support Moderator **
sanjay_thakur provided that solution before you, so I will force-accept his comment within the next 72 hours.
** Mindphaser - Community Support Moderator **
Force accepted
** Mindphaser - Community Support Moderator **
** Mindphaser - Community Support Moderator **
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