In this source code example, we will write a Java program that converts any Binary Number to a Hexadecimal Number.

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Java Convert Binary to a Hexadecimal

Below Java programs converts any Binary Number to a Hexadecimal Number:

package net.sourcecodeexamples.java.Conversions;

import java.util.*;

/**
 * Converts any Binary Number to a Hexadecimal Number
 *
 * @author sourcecodeexamples.net
 */
public class BinaryToHexadecimal {

    /**
     * This method converts a binary number to a hexadecimal number.
     *
     * @param binary The binary number
     * @return The hexadecimal number
     */
    static String binToHex(int binary) {
        // hm to store hexadecimal codes for binary numbers within the range: 0000 to
        // 1111 i.e. for decimal numbers 0 to 15
        HashMap < Integer, String > hm = new HashMap < > ();
        // String to store hexadecimal code
        String hex = "";
        int i;
        for (i = 0; i < 10; i++) {
            hm.put(i, String.valueOf(i));
        }
        for (i = 10; i < 16; i++)
            hm.put(i, String.valueOf((char)('A' + i - 10)));
        int currbit;
        while (binary != 0) {
            int code4 = 0; // to store decimal equivalent of number formed by 4 decimal digits
            for (i = 0; i < 4; i++) {
                currbit = binary % 10;
                binary = binary / 10;
                code4 += currbit * Math.pow(2, i);
            }
            hex = hm.get(code4) + hex;
        }
        return hex;
    }

    /**
     * Main method
     *
     * @param args Command line arguments
     */
    public static void main(String[] args) {
        try (Scanner sc = new Scanner(System.in)) {
            System.out.print("Enter binary number: ");
            int binary = sc.nextInt();
            String hex = binToHex(binary);
            System.out.println("Hexadecimal Code: " + hex);
        }
    }
}

Output

Enter binary number: 1111
Hexadecimal Code: F

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