public void populate() { productLines = model.getProductLines(); suppliers = model.getSuppliers(); createMap(); products = model.getProducts(); if (iProductLineList.getItemCount() != 0) { iProductLineList.removeAllItems(); } iProductLineList.addItem(" "); for (ProductLine productLine : productLines) { iProductLineList.addItem(productLine.getProductLineName()); } if (iSupplierList.getItemCount() != 0) { iSupplierList.removeAllItems(); } iSupplierList.addItem(" "); for (Supplier supplier : suppliers) { iSupplierList.addItem(supplier.getSupplierName()); } populateTable(); }