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import java.util.*;

/**

* Converts any Binary Number to a Hexadecimal Number

*

* @author Nishita Aggarwal

*

*/

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) {

Scanner sc = new Scanner(System.in);

System.out.println("Enter binary number:");

int binary = sc.nextInt();

String hex = binToHex(binary);

System.out.println("Hexadecimal Code:" + hex);

sc.close();

}

}