convert binary string to hexadecimal java

/** * Method receives String hexadecimal value (of any range) and returns a String of a binary representation * hexadecimal string format (ex.:"2FFA") * Use of if-than-else statement inside for loop * Use the Integer.toBinaryString(int i) method */ private String parseHexBinary(String hex) { String digits = "0123456789ABCDEF"; hex = hex.toUpperCase(); String binaryString = ""; for(int i = 0; i < hex.length(); i++) { char c = hex.charAt(i); int d = digits.indexOf(c); if(d == 0) binaryString += "0000"; else binaryString += Integer.toBinaryString(d); } return binaryString; }

binary to hexadecimal in java

import java.util.Scanner;
public class BinaryToHexadecimalJava
{
   public static void main(String[] args)
   {
      int[] hexaDecimal = new int[1000];
      int a = 1, b = 0, r, decimal = 0, binary;
      Scanner sc = new Scanner(System.in);
      System.out.print("Please enter binary number: ");
      binary = sc.nextInt();
      while(binary > 0)
      {
         r = binary % 2;
         decimal = decimal + r * a;
         a = a * 2;
         binary = binary / 10;
      }
      a = 0;
      while(decimal != 0)
      {
         hexaDecimal[a] = decimal % 16;
         decimal = decimal / 16;
         a++;
      }
      System.out.print("Equivalent hexadecimal value is: ");
      for(b = a - 1; b >= 0; b--)
      {
         if(hexaDecimal[b] > 9)
         {
            System.out.print((char)(hexaDecimal[b] + 55) + "\n");
         }
         else
         {
            System.out.print(hexaDecimal[b] + "\n");
         }
      }
      sc.close();
   }
}

Posted by: Guest on October-30-2020

Source

/** * Method receives String hexadecimal value and returns a String of a binary representation * hexadecimal string format (ex.:"2FFA") * Only works with positive hexadecimal values (16xF does not work) * Uses 2 for loops (hex -> dec & dec -> bin) */ private static int[] parseHexBinary(String hex) { String digits = "0123456789ABCDEF"; int[] binaryValue = new int[hex.length()*4]; long val = 0; // convert hex to decimal for(int i = 0; i < hex.length(); i++) { char c = hex.charAt(i); int d = digits.indexOf(c); val = val*16 + d; } // convert decimal to binary for(int i = 0; i < binaryValue.length; i++) { binaryValue[i] = (int) (val%2); val = val/2; } return binaryValue; }

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