lec2.3.2

public class InvoiceTest
 {
    public static void main( String args[] )
    {
         Invoice invoice1 = new Invoice( "1234", "Jacket", 3, 26.95 );

         System.out.println( "Invoice information:" );
         System.out.printf( "Part number: %s\n", invoice1.getPartNumber() );
         System.out.printf( "Description: %s\n", invoice1.getPartDescription() );
         System.out.printf( "Quantity: %d\n", invoice1.getQuantity() );
         System.out.printf( "Price: %.2f\n", invoice1.getPricePerItem() );
         System.out.printf( "Invoice amount: %.2f\n", invoice1.getInvoiceAmount() );

         Invoice invoice2 = new Invoice("5678" , "Yellow Jacket" , 4 , 28.49);

         System.out.println( "\nInvoice information" );
         System.out.printf( "Part number: %s\n", invoice2.getPartNumber() );
         System.out.printf( "Description: %s\n", invoice2.getPartDescription() );
         System.out.printf( "Quantity: %s\n", invoice2.getQuantity() );
         System.out.printf( "Price: %s\n", invoice2.getPricePerItem() );
         System.out.printf( "Invoice amount: %s\n", invoice2.getInvoiceAmount() );
    }
 }