scanner class

[cdm2883]

I have this bit of code...

System.out.println ("Enter the name of book: ");
bookName = scan.nextLine();


then i have code after that that prints out what i want it to. But when it gets to this part of my code it just jumps the println methods i have called. What little code snipet do i need for it to let me type in the name of the book before it moves on?


Thanks!

[Laharl]

That sounds like you have leftover data in the input buffer that the Scanner grabs, assuming it's the next line. Can we see more code? (I know there's a way to fix this, but can't remember it offhand...)

[cdm2883]

here is some more code...

.        System.out.println ("Enter the quantity: ");
        numInStock = scan.nextInt();
 
        System.out.println ("Enter the unit price: ");
        priceEach = scan.nextDouble();
 
        System.out.println ("Enter the name of book: ");
        bookName = scan.nextLine();
 
 
        // create a variable named grossCost that is the
        // value of the numInStock times the priceEach
        double grossCost = (numInStock * priceEach); 
 
 
 
 
        System.out.println ("There are " + numInStock + 
        " copies of the book " + bookName + " ! in stock which" +
        " cost " + priceEach + " each for a total value of "
        + fmt1.format(grossCost) + "");
 

and as well if you could help with the formating of currency. i have this and eclipse says it can not be resolved as a type...

NumberFormat fmt1 = NumberFormat.getCurrencyInstance();
 

Thanks!

[cdm2883]

ok so i figured out the currency part, i forgot to import the numberFormat. but i still can not figure out the scanner class part



Thanks

[cdm2883]

ok i figured out the scanner part. now i am having a problem the printing part. here is all of my code...

package mooredMod2;
 
import java.util.Scanner;
import java.text.NumberFormat;
 
public class Ex4Expressions {
 
public static void main(String[] args) {
 
        // we need the following line to use the scanner class    
        Scanner scan = new Scanner(System.in);
 
        NumberFormat nf = NumberFormat.getCurrencyInstance();
 
        // define the following variables.  You decide
        // the data types (but remember my comments from module 1).
        // Write your line of code after
        // my comment and LEAVE my comments in for
        // documentation. Do this in all of your submissions!!!!
 
        // a variable named numInStock that represents the
        // number of books in stock
        int numInStock ; 
 
        // a variable named priceEach that represents the 
        // cost for each book
 
        double priceEach ;
 
        // a variable named bookName that represents the name 
        // of the book
 
        String name; 
 
 
 
        // ask the user for the value of each of these 
        // variables and read their answer
        //     from the keyboard using the Scanner class.
        // you will need 6 total lines of code.
        // one for the prompt and one for the response for 
        // each of the three variables
 
        System.out.println ("Enter the quantity: ");
        numInStock = scan.nextInt ();
 
        System.out.println ("Enter the unit price: ");
        priceEach = scan.nextDouble ();
 
        System.out.println ("Enter the name of book: ");
         name = scan.nextLine ();
 
 
 
 
        // value of the numInStock times the priceEach
        double grossCost = (numInStock * priceEach); 
 
        scan.nextLine();
 
 
 
        System.out.println ("There are " + numInStock + 
        " copies of the book " + name + "!  in stock which" +
        " cost " + nf.format(priceEach) + " each for a total value                         of "+ nf.format(grossCost) + "");
 
    }
}

there is the code. the problem i am having is where the name is. im tryin to print out the name of the book the person typed in. but when i run it nuthing comes up for the name. any help on that?


Thanks

[Ganon11]

Try using next() instead of nextLine(). It seems that the last time you use the scanner (scan.nextDouble()), you get the double value, but it leaves the newline character '\n' in the scanner buffer. When you call nextLine(), scan immediately sees that '\n', thinks it is done, gets rid of that '\n', and continues.