Question

I am just wondering whether is it possible to display number in digital format.
In this we are accepting number from console.

For example:

123 should be display in following format, and in one line.
  _  _
| _| _|
| |_ _|

I tried using switch case but not got appropriate method

"arg" is char array;
char c;
for(i=0;i<3;i++)
{
c=arg[i];
switch(char)
{

    case '1' : System.out.println("|");
               System.out.println("|");
               break;
    case '2' : System.out.println("-");
               System.out.println(" "+"|");
               System.out.println("-");
               System.out.println("|");
               System.out.println("-");
               break;

  same for all digit
}
}

I know this is not a correct solution to display.

Is it any alternative for this using java.

EDIT
Updated code which is suggested by Joe. It works.

        /**
        * @author Amit
        */
        public class DigitalDisplay {
            /**
             * @param args
             */
                public static void main(String[] args) {
        String [][] num=new String[4][3];
        num[0][0]="|-|";
        num[0][1]="| |";
        num[0][2]="|_|";

        num[1][0]=" |";
        num[1][1]=" |";
        num[1][2]=" |";

        num[2][0]=" -|";
        num[2][1]=" _|";
        num[2][2]=" |_";

        num[3][0]=" -|";
        num[3][1]=" _|";
        num[3][2]=" _|";
        int[] input = {2,1,3}; 
        for (int line = 0; line < 3; line++)
        {          
            for (int inputI=0; inputI < input.length; inputI++)
            {
                int value = input[inputI];
                System.out.print(num[value][line]);
                System.out.print("  ");
            }          
            System.out.println();
        }
    }
}

**OUTPUT**

 -|   |   -|  
 _|   |   _|  
 |_   |   _|  

@Joe: Thanks.

Answer 1

If you have more than one character, you need to scan across each line, building it up.

All of the following is pseudocode, but I am sure you can translate it into Java. You will need to create a grid and ensure that each digit has the same width and height.

1 – Set up your initial data for each number. You could do this as a 2d array (dimension 1: digit, dimension 2: line) For example:

numbers[0][0] = "|-|"
numbers[0][1] = "| |"
numbers[0][2] = "|_|"

numbers[1][0] = "  |"
numbers[1][1] = "  |"
numbers[1][2] = "  |"

2 – For each line that makes up the character, scan across each digit in your input and write the appropriate string. This will build up the characters line by line.

input = [1,2,3]
digit_height = 3

for line digit_height:
   for digit in input:
       print numbers[digit][line]
       print "  " to space between characters
   print new line

Fine, here’s the java:

    int[] input = {2,1,3}; 
    for (int line = 0; line < 3; line++)
    {          
        for (int inputI=0; inputI < input.length; inputI++)
        {
            int value = input[inputI];
            System.out.print(num[value][line]);
            System.out.print("  ");
        }          
        System.out.println();
    }