Nested Loops

This assignment is designed to give you additional practice with nested loops. Also, it is awesome.

The Infamous Letter Cube

• Make a 3x3x3 array of Strings, and fill it with the letters of the alphabet using code similar to the following:

import java.util.Scanner;

public class LetterCube
{
    public static void main( String[] args )
    {
        System.out.println("Welcome to the infamous Letter Cube!\n");
        LetterCube cube = new LetterCube();
        Scanner console = new Scanner( System.in );
        String side;
        
        do
        {
            System.out.print("Which side: ");
            side = console.next();
            if ( side.equals("front") )
                cube.showFront();
            else if ( side.equals("back") )
                cube.showBack();
            // etc
        } while ( ! side.equals("quit") );
    }

    private String[][][] cube;

    public LetterCube()
    {
        cube = new String[3][3][3];
        char c = 'A';

        for ( int L=0; L<3; L++ )
            for ( int R=0; R<3; R++ )
                for ( int C=0; C<3; C++ )
                    cube[L][R][C] = new String( "" + c++ );
                    //   ^  ^  ^
                    //   |  |  |
                    //   |  |  +-- column
                    //   |  +----- row
                    //   +-------- layer
    }

    public void showFront()
    {
        // layer fixed at 0, rows go forward, columns go forward
        for ( int r=0; r<3; r++ )
        {
            for ( int c=0; c<3; c++ )
            {
                System.out.print( cube[0][r][c] );
            }
            System.out.println();
        }
    }

    public void showBack()
    {
    }
}

Now write code to display what letters you would see looking at each of the six faces of the cube. Remember, you are looking at the outside of the cube, so (for example) the letters will appear to be in reverse order if you're looking at the back. You must use nested for loops for this assignment.

Welcome to the infamous Letter Cube!

Which side: front

ABC
DEF
GHI

Which side: back

UTS
XWV
[ZY

Which side: left

SJA
VMD
YPG

Which side: right

CLU
FOX
IR[

Which side: top

STU
JKL
ABC

Which side: bottom

GHI
PQR
YZ[

Which side: quit