CODEWITHSUNDEEP
javaprintf
Dylan Kelemen
Dylan Kelemen

Reputation: 173

Printf issues in Java

Having a little bit of trouble in Java here with my printf statement. My code works properly, as I have tested it with println, I just need to get my spacing correct which is why I need to use printf. I've tried numerous ways of spacing and separating my strings and variables. I think part of the issue is that I have to use the "$" and that is messing with the printf statement. This is part of a school project so that is why I have to use printf instead of just doing a println statment. My code is as follows

for(double ten = 10.00; ten < 15.00; ten = ten + .75){
        /**
         * We use the variable tip to calculate a %20 tip and we use the
         * variable totalWithTip to calculate the total of the dinner price
         * and the tip added together.
         */
        double tip = ten * .2;
        double totalWithTip = ten + tip;

        System.out.printf("$%7s%4.2d$%13s%4.2d$%13s%4.2d\n", ten, tip, totalWithTip);
    }

I need the output to look like

  Dinner Price          20% tip         Total
---------------------------------------------------
      $10.00            $ 2.00            $12.00
      $10.75            $ 2.15            $12.90
      $11.50            $ 2.30            $13.80
      $12.25            $ 2.45            $14.70
      $13.00            $ 2.60            $15.60
      $13.75            $ 2.75            $16.50
      $14.50            $ 2.90            $17.40

Upvotes: 1

Views: 275

Answers (3)

Aram Paronikyan
Aram Paronikyan

Reputation: 1608

In your case, this might be a solution:

System.out.printf("%7s$%4.2f%13s$ %4.2f%13s$%4.2f\n"," ",  ten, " ", tip, " ", totalWithTip);

In your example, the spaces were put after data. Also, you just need %f for a double (or float), with the .2 specifying the decimal places.

Upvotes: 2

Josef
Josef

Reputation: 321

Another alternative:

System.out.printf("%7s$%-13.2f$%-13.2f$%-13.2f\n", " ", ten, tip, totalWithTip);

The '-' aligns the output of the parameter to the left and adds padding characters to the right.

Upvotes: 2

dahui
dahui

Reputation: 2166

System.out.printf("$%.2f $%.2f $%.2f \n", ten, tip, totalWithTip);

You just need %f for a double (or float), with the .2 specifying the decimal places.

For the spaces, you use the 'c' character, prefixed with the number of spaces. E.g. %6c will print 6 characters.

System.out.printf("$%.2f%6c$%.2f%6c$%.2f\n", ten, ' ', tip,' ',totalWithTip);

Upvotes: 3

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