mainTable.repaint();
}//GEN-LAST:event_deletePointButtonActionPerformed
private void addPointButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_addPointButtonActionPerformed
try {
FunctionPoint point = new FunctionPoint(Double.parseDouble(newPointXField.getText()), Double.parseDouble(newPointYField.getText()));
try {
functionTable.addPoint(point);
} catch (InappropriateFunctionPointException ex) {
JOptionPane.showMessageDialog(rootPane, "Such point already exist!");
}