In this tutorial, we will write a Java Program to Convert a Binary Number to Hexadecimal Number. Before that, you must have knowledge of the following topics in java.

**Binary number**

The binary numbers are based on 0 and 1, so it is a base 2 number. They are the combination of 0 and 1. For example, 1001, 110101, etc.

**Hexadecimal** **number**

The hexadecimal number is represented with a base of 16. It has digits from 0 to 15 to represent, However after 9 the values are represented in Alphabet till 15 such as 10 is represented as A, 11 as B, 12 as C, 13 as D, 14 as E, and 15 as F.

**Input:** 11011111 **Output:** DF **Input: **10001101 **Output: **8D

Now let us go through a program for Binary to hexadecimal conversion in java.

**Java Program to Convert Binary to Hexadecimal using While loop**

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 | import java.util.Scanner; public class Main { public static void main(String[] args) { int[] hexaDecnum = new int[1000]; int i = 1, j = 0, rem, decNum = 0, binary; Scanner in = new Scanner(System.in); System.out.print("Enter a Binary Number: "); binary = in .nextInt(); while (binary > 0) { rem = binary % 2; decNum = decNum + rem * i; i = i * 2; binary /= 10; } i = 0; while (decNum != 0) { hexaDecnum[i] = decNum % 16; decNum = decNum / 16; i++; } System.out.print("Equivalent Hexadecimal value: "); for (j = i - 1; j >= 0; j--) { if (hexaDecnum[j] > 9) System.out.print((char)(hexaDecnum[j] + 55) + "\n"); else System.out.print(hexaDecnum[j] + "\n"); } } } |

**Output:**

`Enter a Binary Number: 1010`

Equivalent Hexadecimal value: A