int () { final JComboBox comboBox = getComboBox(); int itemCount = comboBox.getItemCount(); if (itemCount == 0) { return 0; } int valuableCount = 0; for (int i = 0; i < itemCount; i++) { if (comboBox.getItemAt(i) != NONE_TOOL) { valuableCount++; } } return valuableCount; }