Tuesday, April 30, 2013

How to Convert from binary to hex in java

Simple One line code to convert String containing a binary value to Hex

String bin = Integer.toHexString(Integer.parseInt(binOutput, 2));

Full Code for conversion

import java.io.*;
import java.lang.*;

public class  BinaryToHexadecimal{
  public static void main(String[] args)throws IOException{
  BufferedReader bf= new BufferedReader(new InputStreamReader(System.in));
  System.out.println("Enter the Binary number:");
  String hex = bf.readLine();
  long num = Long.parseLong(hex);
  long rem;
  while(num > 0){
  rem = num % 10;
  num = num / 10;
  if(rem != 0 && rem != 1){
  System.out.println("This is not a binary number.");
  System.out.println("Please try once again.");
  int i= Integer.parseInt(hex,2);
  String hexString = Integer.toHexString(i);
  System.out.println("Hexa decimal: " + hexString);

Enter the Binary number:
Hexa decimal: 2a

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