WOW WTF??? MUST REVIEW CODE. INTERESTING

int months, counter = 1 ;
		String str = "", str2;
		double bills;
		double bills2=0;
		double total = 0, ave = 0;

		months = Integer.parseInt(JOptionPane.showInputDialog("Enter number of months of electricty bill"));

		while (counter<=months)
		{


			bills = Double.parseDouble(JOptionPane.showInputDialog("Enter electricity bill for the month " + counter));
			bills2 = bills + bills2;

			str += str2 = "Month: " + counter+ " = " + bills + "\n";
			counter++;

		}

		ave = bills2/counter;
		JOptionPane.showMessageDialog(null, str + "\n The total electricity bill is " + String.format("%.2f", bills2) + "\n The average is " + String.format("%.2f", ave));