Java SE 6 Arrows for ASC/DESC are above Header-Text (is must have by customer)
I use to show arrows above header-text:
TableRowSorter sorter = new TableRowSorter();
sorter.setModel(table.getModel());
table.setRowSorter(sorter);
or
table.setAutoCreateRowSorter(true);
Arrows for ASC/DESC are above Header-Text, that's right. I want to use my own comparator, but in my example, comparator is called, but it does not functioned. What code is to change to sort table-rows by my own comparator with arrows above header-text sorting asc/desc?
import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.Collections;
import java.util.Comparator;
import java.util.Vector;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableRowSorter;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class JTableExample extends JFrame {
private JTable table;
private FooTableModel model;
public JTableExample() {
super("JTableExample");
setDefaultCloseOperation(EXIT_ON_CLOSE);
String plaf = UIManager.getSystemLookAndFeelClassName();
try {
UIManager.setLookAndFeel(plaf);
}
catch (ClassNotFoundException e) {}
catch (InstantiationException e) {}
catch (IllegalAccessException e) {}
catch (UnsupportedLookAndFeelException e) {}
SwingUtilities.updateComponentTreeUI(this);
Object[][] rowData = { { "a", "c" }, { "b", "b" }, { "c", "a" } };
Object[] columnHeaders = { "Header1", "Header2" };
model = new FooTableModel(rowData, columnHeaders);
table = new JTable(model);
table.setAutoCreateRowSorter(true);
table.getTableHeader().addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent evt) {
model.sortByColumn(table.columnAtPoint(evt.getPoint()));
}
});
Container c = getContentPane();
c.add(new JScrollPane(table), BorderLayout.CENTER);
pack();
setVisible(true);
}
public static void main(String[] args) {
new JTableExample();
}
class FooTableModel extends DefaultTableModel {
public FooTableModel(Object[][] rowData, Object[] headers) {
super(rowData, headers);
}
public void sortByColumn(final int clm) {
Collections.sort(this.dataVector, new Comparator() {
public int compare(Object o1, Object o2) {
Vector v1 = (Vector) o1;
Vector v2 = (Vector) o2;
String s1 = (String) v1.get(clm);
String s2 = (String) v2.get(clm);
return s1.compareTo(s2);
}
});
}
}
}
Whatever your problem is exactly (hard to tell from your description), you are doing the sorting incorrectly: in Swing JTable the sorting is considered the responsibility of the view (vs. the model as in your implementation).
Custom comparators (per column) are configured in the rowSorter, something like:
BTW: the location of the sort icon is controlled by the LAF, not much you can do to change that (short of writing a custom LAF)