How to Add Icons to JTable Headers In Java Netbeans
In this Java Tutorial we will see How To Create a JFrame containing a JTable with custom icon headers for each column In Java Using Netbeans.
What We Are Gonna Use In This Project:
- Java Programming Language.- NetBeans Editor.
Project Source Code:
package new_tutorials;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.net.URL;
import javax.swing.BorderFactory;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.TableColumnModel;
import javax.swing.tree.DefaultTreeCellRenderer;
/**
*
* @author 1BestCsharp
*/
public class JTableIconHeader extends JFrame{
public JTableIconHeader(){
setTitle("JTable Icon Header");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
String[] columnNames = {"","",""};
Object[][] data = {
{"Product A", "$100", "Category 1"},
{"Product B", "$200", "Category 2"},
{"Product C", "$150", "Category 3"},
{"Product D", "$200", "Category 4"},
{"Product E", "$150", "Category 3"},
{"Product F", "$200", "Category 2"},
{"Product CC", "$150", "Category 1"},
{"Product BA", "$200", "Category 4"},
{"Product AC", "$150", "Category 1"},
{"Product CB", "$200", "Category 2"},
{"Product DC", "$150", "Category 4"},
{"Product AF", "$200", "Category 2"},
{"Product EB", "$150", "Category 3"}
};
JTable table = new JTable(data,columnNames);
TableColumnModel columnModel = table.getColumnModel();
columnModel.getColumn(0).setHeaderRenderer(new IconHeaderRenderer("images/item100.png"));
columnModel.getColumn(1).setHeaderRenderer(new IconHeaderRenderer("images/price100.png"));
columnModel.getColumn(2).setHeaderRenderer(new IconHeaderRenderer("images/stock100.png"));
table.setRowHeight(27);
table.setBackground(Color.GRAY);
table.setForeground(Color.WHITE);
table.setGridColor(Color.YELLOW);
JScrollPane scrollPane = new JScrollPane(table);
add(scrollPane);
setSize(700,500);
setLocationRelativeTo(null);
}
public static void main(String[] args) {
JTableIconHeader frame = new JTableIconHeader();
frame.setVisible(true);
}
}
// Create a custom cell renderer class for rendering headers with icons
class IconHeaderRenderer extends DefaultTableCellRenderer{
private ImageIcon icon;
// Constructor that takes the name of the icon file
public IconHeaderRenderer(String iconName){
// Retrieve the URL of the icon file
URL imageURL = JTableIconHeader.class.getResource(iconName);
// If the URL is not null, create an ImageIcon
if(imageURL != null){ icon = new ImageIcon(imageURL); }
// Set the horizontal alignment of the cell renderer to center
setHorizontalAlignment(CENTER);
setBackground(Color.WHITE);
setForeground(Color.DARK_GRAY);
}
// Override method to customize the rendering of table cells
@Override
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column){
// Get the default label component for rendering
JLabel label = (JLabel) super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
// If the icon is not null, set the icon, size, and border for the label
if(icon != null){
label.setIcon(icon);
label.setPreferredSize(new Dimension(150, 150));
label.setBorder(BorderFactory.createMatteBorder(1, 1, 1, 1, Color.BLACK));
}
// Return the customized label
return label;
}
}
The Final Result:
.png "How to Add Images to JTable Headers In Java")
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