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import java.awt.BorderLayout;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableColumnModel;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableColumn;
public class ColumnExample extends JFrame {
public ColumnExample() {
super("Abstract Model JTable Test");
setSize(300, 200);
setDefaultCloseOperation(EXIT_ON_CLOSE);
DefaultTableModel dtm = new DefaultTableModel(new String[][] {
{ "1", "2", "3" }, { "4", "5", "6" } }, new String[] { "Names",
"In", "Order" });
SortingColumnModel scm = new SortingColumnModel();
JTable jt = new JTable(dtm, scm);
jt.createDefaultColumnsFromModel();
JScrollPane jsp = new JScrollPane(jt);
getContentPane().add(jsp, BorderLayout.CENTER);
}
public static void main(String args[]) {
ColumnExample ce = new ColumnExample();
ce.setVisible(true);
}
}
class SortingColumnModel extends DefaultTableColumnModel {
public void addColumn(TableColumn tc) {
super.addColumn(tc);
int newIndex = sortedIndexOf(tc);
if (newIndex != tc.getModelIndex()) {
moveColumn(tc.getModelIndex(), newIndex);
}
}
protected int sortedIndexOf(TableColumn tc) {
// just do a linear search for now
int stop = getColumnCount();
String name = tc.getHeaderValue().toString();
for (int i = 0; i < stop; i++) {
if (name.compareTo(getColumn(i).getHeaderValue().toString()) <= 0) {
return i;
}
}
return stop;
}
}
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