public void setValueAt(Object value, int row, int col) {
boolean change = false;
if (value != null) {
values[row][col] = (String) value;
String temp = (String) value;
temp = temp.replaceAll(" ", "");
String str = match(temp, row, col);
if (!str.equals(strings[row][col])) {
strings[row][col] = match(temp, row, col);
change = true;
}
}

if (change) {
for (int i = 0; i < row; ++i) {
for (int j = 0; j < columns; ++j) {
setValueAt(values[i][j], i, j);
}
}
}
fireTableCellUpdated(row, col);
}