Now we shall discuss how to include a JCheckBox in a table cell.
CheckBoxJFrame.java
/**
* CheckBoxJFrame.java
*
* Created on Aug 2, 2013, 11:57:36 PM
*/
package me.dhanoop.forblog;
import java.awt.Component;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.DefaultCellEditor;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellRenderer;
/**
*
* @author dhanoopbhaskar
*/
public class CheckBoxJFrame extends javax.swing.JFrame {
private JCheckBox tableData = null;
/** Creates new form CheckBoxJFrame */
public CheckBoxJFrame() {
initComponents();
customizeTable();
}
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
//
private void initComponents() {
dbScrollPane = new javax.swing.JScrollPane();
dbTable = new javax.swing.JTable();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
dbTable.setModel(new javax.swing.table.DefaultTableModel(
new Object [][] {
},
new String [] {
"Title 1"
}
));
dbScrollPane.setViewportView(dbTable);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(dbScrollPane, javax.swing.GroupLayout.PREFERRED_SIZE, 226, javax.swing.GroupLayout.PREFERRED_SIZE)
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(dbScrollPane, javax.swing.GroupLayout.PREFERRED_SIZE, 81, javax.swing.GroupLayout.PREFERRED_SIZE)
);
pack();
}//
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new CheckBoxJFrame().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JScrollPane dbScrollPane;
private javax.swing.JTable dbTable;
// End of variables declaration
private void customizeTable() {
Object[] columnNames = new Object[1];
columnNames[0] = "CheckBox";
String checkString = "Gate Qualified?";
Object[][] rowData = new Object[1][1];
rowData[0][0] = checkString;
DefaultTableModel tableModel = new DBTableModel(rowData, columnNames);
dbTable.setModel(tableModel);
tableData = new JCheckBox(checkString);
tableData.setSelected(false);
tableData.addItemListener(new ItemListener() {
public void itemStateChanged(ItemEvent e) {
String result = "";
if (tableData.isSelected()) {
result = "YES";
} else {
result = "NO";
}
JOptionPane.showMessageDialog(new JFrame(), result, "Gate Qualified?", JOptionPane.INFORMATION_MESSAGE);
}
});
dbTable.getColumnModel().getColumn(0).setCellEditor(new DefaultCellEditor(tableData));
dbTable.getColumnModel().getColumn(0).setCellRenderer(new TableCellRenderer() {
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
return tableData;
}
});
dbTable.updateUI();
}
}DBTableModel.java
package me.dhanoop.forblog;
import javax.swing.table.DefaultTableModel;
/**
*
* @author dhanoopbhaskar
*/
public class DBTableModel extends DefaultTableModel {
public DBTableModel(Object[] columns) {
super(columns, 0);
}
public DBTableModel(Object[][] data, Object[] columns) {
super(data, columns);
}
@Override
public boolean isCellEditable(int row, int column) {
return true;
}
}The following is the key snippet in the program. Here we do mainly two things:
-
Changing the
CellEditorof the ColumnModel of the column at position 0 (zero) of the table -
Changing the
CellRendererof the ColumnModel of the column at position 0 (zero) of the table.
private void customizeTable() {
Object[] columnNames = new Object[1];
columnNames[0] = "CheckBox";
String checkString = "Gate Qualified?";
Object[][] rowData = new Object[1][1];
rowData[0][0] = checkString;
DefaultTableModel tableModel = new DBTableModel(rowData, columnNames);
dbTable.setModel(tableModel);
tableData = new JCheckBox(checkString);
tableData.setSelected(false);
tableData.addItemListener(new ItemListener() {
public void itemStateChanged(ItemEvent e) {
String result = "";
if (tableData.isSelected()) {
result = "YES";
} else {
result = "NO";
}
JOptionPane.showMessageDialog(new JFrame(), result, "Gate Qualified?", JOptionPane.INFORMATION_MESSAGE);
}
});
dbTable.getColumnModel().getColumn(0).setCellEditor(new DefaultCellEditor(tableData));
dbTable.getColumnModel().getColumn(0).setCellRenderer(new TableCellRenderer() {
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
return tableData;
}
});
dbTable.updateUI();
}
