ComboBox Table
/*
Core SWING Advanced Programming
By Kim Topley
ISBN: 0 13 083292 8
Publisher: Prentice Hall
*/
import javax.swing.*;
import javax.swing.table.*;
import java.awt.event.*;
public class ComboBoxTable {
public static void main(String[] args) {
try {
UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
} catch (Exception evt) {}
JFrame f = new JFrame("Combo Box Table");
JTable tbl = new JTable(new ComboBoxTableModel());
// Create the combo box editor
JComboBox comboBox = new JComboBox(ComboBoxTableModel.getValidStates());
comboBox.setEditable(true);
DefaultCellEditor editor = new DefaultCellEditor(comboBox);
// Assign the editor to the second column
TableColumnModel tcm = tbl.getColumnModel();
tcm.getColumn(1).setCellEditor(editor);
// Set column widths
tcm.getColumn(0).setPreferredWidth(200);
tcm.getColumn(1).setPreferredWidth(100);
// Set row heighht
tbl.setRowHeight(20);
tbl.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
tbl.setPreferredScrollableViewportSize(tbl.getPreferredSize());
f.getContentPane().add(new JScrollPane(tbl), "Center");
f.pack();
f.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent evt) {
System.exit(0);
}
});
f.setVisible(true);
}
}
class ComboBoxTableModel extends AbstractTableModel {
// Implementation of TableModel interface
public int getRowCount() {
return data.length;
}
public int getColumnCount() {
return COLUMN_COUNT;
}
public Object getValueAt(int row, int column) {
return data[row][column];
}
public Class getColumnClass(int column) {
return (data[0][column]).getClass();
}
public String getColumnName(int column) {
return columnNames[column];
}
public boolean isCellEditable(int row, int column) {
return column == 1;
}
public void setValueAt(Object value, int row, int column) {
if (isValidValue(value)) {
data[row][column] = value;
fireTableRowsUpdated(row, row);
}
}
// Extra public methods
public static String[] getValidStates() {
return validStates;
}
// Protected methods
protected boolean isValidValue(Object value) {
if (value instanceof String) {
String sValue = (String)value;
for (int i = 0; i < validStates.length; i++) {
if (sValue.equals(validStates[i])) {
return true;
}
}
}
return false;
}
protected static final int COLUMN_COUNT = 2;
protected static final String[] validStates = {
"On order", "In stock", "Out of print"
};
protected Object[][] data = new Object[][] {
{ "Core Java Volume 1", validStates[0] },
{ "Core Java Volume 2", validStates[0] },
{ "Core Web Programming", validStates[0] },
{ "Core Visual Basic 5", validStates[0] },
{ "Core Java Foundation Classes", validStates[0] }
};
protected static final String[] columnNames = {
"Book Name", "Status"
};
}
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