why my scanner class can't read the 3 variable

Question

import java.util.Scanner;

public class Question5 {

    public static void main(String [] args) {
        Scanner keyboard = new Scanner(System.in);
        System.out.print("Enter a number: ");
        int x = keyboard.nextInt();
        System.out.print("Enter a char: ");
        String c1 = keyboard.nextLine();
        System.out.print("Enter a char: ");
        String c2 = keyboard.nextLine();
        printChars(x, c1, c2);

    }

    public static void printChars(int x, String c1, String c2) {
        for (int i = 1 ; i <= x ; i++) {//
            for (int z = 1 ; z <= x - i ; z++)//
                System.out.print(c1);
            for (int j = 1 ; j <= x ; j++)//
                System.out.print(c2);
            System.out.println();
        }
    }
}

it's the output i got now

 ----jGRASP exec: java Question5

Enter a number: 8
Enter a char: 
Enter a char: 
6
66666666
66666666
66666666
66666666
66666666
66666666
66666666
66666666

----jGRASP: operation complete.

but it shoud print like this

Enter a number: 5
Enter a char: %
Enter a char: $

% % % % %
% % % % $
% % % $ $
% % $ $ $
% $ $ $ $
$ $ $ $ $

please help me with this it's my first question on this forum

Check out http://stackoverflow.com/questions/5032356/using-scanner-nextline — Peter Svensson, Jun 06 '14 at 11:07

score 1 · Answer 1 · answered Jun 06 '14 at 11:05

1

Instead of using keyboard.nextLine(), just use keyboard.next() for reading strings.

answered Jun 06 '14 at 11:05

Florescent Ticker

623
3
9

score 0 · Answer 2 · answered Jun 06 '14 at 11:14

This looks like a homework question; don't expect homework answers here. Instead, try and debug it yourself, it's more instructive.

First of all, try and clearly describe to yourself (or someone else) what behaviour exactly is 'wrong' (e.g. capturing input or processing of captured input). It might also help to break down the program into 2 parts e.g.

Input - which behaved unexpectedly when I tested your code
Processing - basically the contents of the printChars method which also behaved unexpectedly.

Identify which section you want to tackle first (personally, I'd tackle the printChars method first since I know exactly what I expect of it) and work through it methodically.

Good luck.

P.S. You're really close so don't give up.

why my scanner class can't read the 3 variable

2 Answers2