Untitled

			try 
			{
				txtName.setBackground(Color.WHITE);

				double billTotal = Double.parseDouble(txtName.getText());
				int totalPeople = Integer.parseInt(txtPeople.getText());
				int incorrectName = 0;
				double tipPercent = Double.parseDouble(txtPercent.getText());

				double tipAmount = billTotal * tipPercent/100;
				incorrectName = 1;
				double grandTotal = billTotal + tipAmount;
				incorrectName = 2;
				double totalperPerson = grandTotal / totalPeople;
				incorrectName = 3;

				DecimalFormat df = new DecimalFormat ("$0.00");

				lblTip.setText("" + df.format(tipAmount));
				lblGrandT.setText("" + df.format(grandTotal));
				lblTP.setText("" + df.format(totalperPerson));


			}

			catch(NumberFormatException a)
			{
				JOptionPane.showMessageDialog(null, "Please fill in the required fields!", "Invalid data!",JOptionPane.ERROR_MESSAGE);
				if (incorrectName == 0) 
				{
					txtName.setBackground(Color.RED);
					txtPeople.setBackground(Color.WHITE);
					txtPercent.setBackground(Color.WHITE);
				}
				else if (incorrectName == 2)
				{
					txtName.setBackground(Color.WHITE);
					txtPeople.setBackground(Color.RED);
					txtPercent.setBackground(Color.WHITE);
				}
				else if (incorrectName == 3)
				{
					txtName.setBackground(Color.WHITE);
					txtPeople.setBackground(Color.WHITE);
					txtPercent.setBackground(Color.RED);
				}
			}	
		}