THIS IS IN JAVA Use for loop, while loop, and do while loops to generate a table

Question

THIS IS IN JAVA

Use for loop, while loop, and do while loops to generate a table of decimal numbers,
as well as the binary, octal, and hexadecimal equivalents of the decimal numbers,
in the range 1-256.

The program should print the results to the Console without using any string formats .

Design Details:

The Main program should prompt the user for input.  
The output is shown in the sample output below.
           
Note:
To generate the binary numbers your code should use a while loop to generate
the binary numbers, a “for” loop to generate the octal numbers and a “do .. while” to
generate the hexadecimal numbers.

See Appendix for number systems.

Sample Output:

Enter the low number:
1
Enter the high number:
10
Decimal Binary          Octal   Hexadecimal
1               1                   1          1
2            10                 2          2
3            11              3         3
4          100                   4         4
5          101                   5          5
6          110                   6        6
7      111                    7         7
8      1000                 10          8
9        1001                  11          9
10       1010                 12         A

****Resetting low and high ****
Low = 10, High = 15
Decimal Binary          Octal   hexadecimal
10           1010            12      A
11            1011            13      B
12           1100            14      C
13           1101            15      D
14           1110            16      E
15     1111            17      F

Press any key to continue . . .

Explanation / Answer

import java.util.Scanner;

public class Convert {
  
   Scanner scan;
   int num;
  
   void getVal() {
      
       int low, high,i,j;
      
       System.out.println("Enter the low number:");
       scan = new Scanner(System.in);
       low = scan.nextInt();
       System.out.println("Enter the high number:");
       scan = new Scanner(System.in);
       high = scan.nextInt();
       System.out.println("Decimal Binary Octal Hexadecimal");
       for (i=low;i<=high;i++){
           System.out.print(i);
           num = i;
           binary_convert();
           oct_convert();
           hex_convert();  
       }
      
   }
  
   void hex_convert() {
      
       String hexa = Integer.toHexString(num);
       int i=0;
       do {
            char letter = hexa.charAt(i);
            System.out.print(letter);
            i++;
               } while (i < hexa.length());
       System.out.println("");
   }

   void oct_convert() {
      
       String oct = Integer.toOctalString(num);
       for (int i = 0; i < oct.length(); i++) {
            // Get letters with charAt method.
            char letter = oct.charAt(i);
            System.out.print(letter);
       }
       System.out.print(" ");
   }

   void binary_convert() {
       System.out.print(" ");
       String bin = Integer.toBinaryString(num);
       int i=0;
       while (i < bin.length()) {
            // Get letters with charAt method.
            char letter = bin.charAt(i);
            System.out.print(letter);
            i++;
       }
       System.out.print(" ");
   }

   public static void main(String args[]) {
      
       Convert obj = new Convert();
      
       obj.getVal();
      
      
   }
}

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