Hello,

I am trying to get my cost, salestax, totalamount to come out in the output dialogbox to have only two decimals places. I know how to do on the printf but not on the dialogbox. Please help. Here in my complete code.

Java Syntax (Toggle Plain Text)

 
// Displaying multiple strings
import javax.swing.*;                // to use JOptionPane.show InputDialog box
 
public class Assignment3 
{
	public static void main( String args[] )
	{
		final double taxes = 0.0825;     // rate for taxes calculation (constant)
 
		int 
		     moreInt = 1,                // loop control variable
		     days = 0;                   // the number of days wanted
 
		double
	                     totalPrice = 0,             // the sum of calculated rental days
		     salesTax = 0,               // the calculated sales tax
		     cost = 0,                   // fixed cost on the amount of rental days
		     totalAmount = 0;            // the total amount for rental days
 
		String numberDays;               // number of days
		String output = "";              // total rental message
		String input = "";               // users input	
 
 
// process unknown number of days, boolean controled loop
    while ( moreInt == 1 ) {
         numberDays = JOptionPane.showInputDialog(
                "Enter the number of rental days" );
 
        // convert numbers from type String       
              days = Integer.parseInt( numberDays ); 
 
 
         // to determine the cost on the rental days
              	if( days >= 1 && days <= 3)
              	{
   		             cost = 35.00;
		        }
		        else if( days >= 4 && days <= 7 )
		        {
         		     cost = 30.00;
		        }
		        else if( days >= 8)
		        {
			         cost = 26.00;
		        }
 
 
         // calculations
              totalAmount = days * cost;
              salesTax = totalAmount * taxes;
              totalPrice = totalAmount + salesTax;
 
 
         // message total output
         JOptionPane.showMessageDialog(null, ("Car Rental Statement" +
         	                          "\n------------------------------" +
         	                          "\n" + days + " days $" + cost + " per day " + totalAmount +
                                      "\nSales taxes @ 8.25% $ " + salesTax + 
                                      "\nTotal Price $ " + totalPrice + 
                                      " \n \n ")); 
 
         // display the "Thank you" message
              if (totalPrice < 100)
                  output = "Thank you - We hope to see you again!";
              else if (totalPrice > 100)
                  output = "Thank you - We appreciate your business!";
 
         // display message total
         JOptionPane.showMessageDialog( null, output );
 
         // display the "Another Rental" message                  
         input = JOptionPane.showInputDialog(
                  "Another rental?\n   1 - yes\n   2 - no\n" );
 
         moreInt = Integer.parseInt( input );
 
      }  //while loop ends
 
 
 
	}  // end method main
 
 
}  // end method Assignment3

// Displaying multiple strings import javax.swing.*; // to use JOptionPane.show InputDialog box public class Assignment3 { public static void main( String args[] ) { final double taxes = 0.0825; // rate for taxes calculation (constant) int moreInt = 1, // loop control variable days = 0; // the number of days wanted double totalPrice = 0, // the sum of calculated rental days salesTax = 0, // the calculated sales tax cost = 0, // fixed cost on the amount of rental days totalAmount = 0; // the total amount for rental days String numberDays; // number of days String output = ""; // total rental message String input = ""; // users input // process unknown number of days, boolean controled loop while ( moreInt == 1 ) { numberDays = JOptionPane.showInputDialog( "Enter the number of rental days" ); // convert numbers from type String days = Integer.parseInt( numberDays ); // to determine the cost on the rental days if( days >= 1 && days <= 3) { cost = 35.00; } else if( days >= 4 && days <= 7 ) { cost = 30.00; } else if( days >= 8) { cost = 26.00; } // calculations totalAmount = days * cost; salesTax = totalAmount * taxes; totalPrice = totalAmount + salesTax; // message total output JOptionPane.showMessageDialog(null, ("Car Rental Statement" + "\n------------------------------" + "\n" + days + " days $" + cost + " per day " + totalAmount + "\nSales taxes @ 8.25% $ " + salesTax + "\nTotal Price $ " + totalPrice + " \n \n ")); // display the "Thank you" message if (totalPrice < 100) output = "Thank you - We hope to see you again!"; else if (totalPrice > 100) output = "Thank you - We appreciate your business!"; // display message total JOptionPane.showMessageDialog( null, output ); // display the "Another Rental" message input = JOptionPane.showInputDialog( "Another rental?\n 1 - yes\n 2 - no\n" ); moreInt = Integer.parseInt( input ); } //while loop ends } // end method main } // end method Assignment3

countrygirl1970

hi countrygirl i am giving you the right method to do it



import javax.swing.*; // to use JOptionPane.show InputDialog box

public class Assignment3
{
public static void main( String args[] )
{
final double taxes = 0.0825; // rate for taxes calculation (constant)

int
moreInt = 1, // loop control variable
days = 0, // the number of days wanted
Ta;
double
totalPrice = 0, // the sum of calculated rental days
salesTax = 0, // the calculated sales tax
cost = 0, // fixed cost on the amount of rental days
totalAmount = 0, // the total amount for rental days
tr;
String numberDays; // number of days
String output = ""; // total rental message
String input = ""; // users input


// process unknown number of days, boolean controled loop
while ( moreInt == 1 ) {
numberDays = JOptionPane.showInputDialog(
"Enter the number of rental days" );

// convert numbers from type String
days = Integer.parseInt( numberDays );


// to determine the cost on the rental days
if( days >= 1 && days <= 3)
{
cost = 35.00;
}
else if( days >= 4 && days <= 7 )
{
cost = 30.00;
}
else if( days >= 8)
{
cost = 26.00;
}


// calculations
totalAmount = days * cost;
salesTax = totalAmount * taxes;
totalPrice = totalAmount + salesTax;
tr = Math.IEEEremainder(totalPrice,1);
tr = tr*100;
tr = Math.rint(tr);
tr= tr*.01;
totalPrice = Math.rint(totalPrice) + tr;




// message total output
JOptionPane.showMessageDialog(null, ("Car Rental Statement" +
"\n------------------------------" +
"\n" + days + " days $" + cost + " per day " + totalAmount +
"\nSales taxes @ 8.25% $ " + salesTax +
"\nTotal Price $ " + totalPrice +
" \n \n "));

// display the "Thank you" message
if (totalPrice < 100)
output = "Thank you - We hope to see you again!";
else if (totalPrice > 100)
output = "Thank you - We appreciate your business!";

// display message total
JOptionPane.showMessageDialog( null, output );

// display the "Another Rental" message
input = JOptionPane.showInputDialog(
"Another rental?\n 1 - yes\n 2 - no\n" );

moreInt = Integer.parseInt( input );

} //while loop ends



} // end method main


} // end method Assignment3