Java Exercises: Convert a binary number to hexadecimal number

Java Basic: Exercise-23 with Solution

Write a Java program to convert a binary number to hexadecimal number.

Binary number: A binary number is a number expressed in the base-2 numeral system or binary numeral system. This system uses only two symbols: typically 0(zero) and 1(one).

Hexadecimal number: This is a positional numeral system with a radix, or base, of 16. Hexadecimal uses sixteen distinct symbols, most often the symbols 0-9 to represent values zero to nine, and A, B, C, D, E, F (or alternatively a, b, c, d, e, f) to represent values ten to fifteen.

Test Data:
Input a binary number: 1101

Pictorial Presentation: Binary to Hexadecimal number

Sample Solution:

Java Code:

import java.util.Scanner;
public class Exercise23 {
 public static void main(String[] args) 
 {
  int[] hex = new int[1000];
  int i = 1, j = 0, rem, dec = 0, bin;
  Scanner in = new Scanner(System.in);
  System.out.print("Input a Binary Number: ");
  bin = in.nextInt();
  while (bin > 0) {
   rem = bin % 2;
   dec = dec + rem * i;
   i = i * 2;
   bin = bin / 10;
  }
   i = 0;
  while (dec != 0) {
   hex[i] = dec % 16;
   dec = dec / 16;
   i++;
  }
  System.out.print("HexaDecimal value: ");
  for (j = i - 1; j >= 0; j--)
  {
   if (hex[j] > 9) 
   {
    System.out.print((char)(hex[j] + 55)+"\n");
   } else
   {
    System.out.print(hex[j]+"\n");
   }
  }
 }
}

Sample Output:

Input a Binary Number: 1101                                                                                   
HexaDecimal value: D

Flowchart:

Java Code Editor:

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