Question

How to convert a string to hexadecimal in Java

Answer 1

class Main {
    public static void main(String args[]) {
        String str = "Java programming language";
 
        StringBuilder hexString = new StringBuilder();
        for (char ch : str.toCharArray()) {
            hexString.append(Integer.toHexString((int)ch) + ' ');
        }
         
        System.out.println(hexString.toString());
    }
}
  
  
  
  
/*
run:
  
4a 61 76 61 20 70 72 6f 67 72 61 6d 6d 69 6e 67 20 6c 61 6e 67 75 61 67 65 
  
*/

 

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Answer 2

class Main {
    public static void main(String args[]) {
        String str = "Java programming language";
 
        StringBuilder hexString = new StringBuilder();
        for (char ch : str.toCharArray()) {
            hexString.append(String.format("%02X", (int)ch));
        }
         
        System.out.println(hexString.toString());
    }
}
  
  
  
  
/*
run:
  
4A6176612070726F6772616D6D696E67206C616E6775616765
  
*/

 

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