import java.util.Collections;
import java.util.Comparator;
import java.util.Vector;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
public class Main {
public static void main(String[] argv) throws Exception {
DefaultTableModel model = new DefaultTableModel();
JTable table = new JTable(model);
table.setAutoCreateColumnsFromModel(false);
Vector data = model.getDataVector();
Collections.sort(data, new ColumnSorter(0));
model.fireTableStructureChanged();
}
}
class ColumnSorter implements Comparator {
int colIndex;
ColumnSorter(int colIndex) {
this.colIndex = colIndex;
}
public int compare(Object a, Object b) {
Vector v1 = (Vector) a;
Vector v2 = (Vector) b;
Object o1 = v1.get(colIndex);
Object o2 = v2.get(colIndex);
if (o1 instanceof String && ((String) o1).length() == 0) {
o1 = null;
}
if (o2 instanceof String && ((String) o2).length() == 0) {
o2 = null;
}
if (o1 == null && o2 == null) {
return 0;
} else if (o1 == null) {
return 1;
} else if (o2 == null) {
return -1;
} else if (o1 instanceof Comparable) {
return ((Comparable) o1).compareTo(o2);
} else {
return o1.toString().compareTo(o2.toString());
}
}
}