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/* SparseTableModel.java */
import java.util.*;
import javax.swing.*;
import javax.swing.table.*;
public class SparseTableModel
extends AbstractTableModel
{
private int size;
private Hashtable data;
//Konstruktor
public SparseTableModel(int size)
{
this.size = size;
this.data = new Hashtable();
}
//Methoden f�r das TableModel-Interface
public int getRowCount()
{
return size;
}
public int getColumnCount()
{
return size;
}
public String getColumnName(int columnIndex)
{
return "C" + columnIndex;
}
public Class getColumnClass(int columnIndex)
{
return String.class;
}
public boolean isCellEditable(int rowIndex, int columnIndex)
{
return rowIndex < size && columnIndex < size;
}
public Object getValueAt(int rowIndex, int columnIndex)
{
String key = "[" + rowIndex + "," + columnIndex + "]";
String value = (String)data.get(key);
return value == null ? "-" : value;
}
public void setValueAt(Object aValue, int rowIndex, int columnIndex)
{
String key = "[" + rowIndex + "," + columnIndex + "]";
String value = (String)aValue;
if (value.length() <= 0) {
data.remove(key);
} else {
data.put(key, value);
}
}
//Zus�tzliche Methoden
public void printData()
{
Enumeration e = data.keys();
while (e.hasMoreElements()) {
String key = (String)e.nextElement();
System.out.println(
"At " + key + ": " + (String)data.get(key)
);
}
}
}
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