How to convert BigInteger value to Hex in Java

Question

I have a BigInteger number and I need to convert it to Hexadecimal. I tried the following:

    String dec = null;
    System.out.println("Enter the value in Dec: ");
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    dec = br.readLine();  
    BigInteger toHex=new BigInteger(dec,16);
    String s=toHex.toString(16);
    System.out.println("The value in Hex is: "+ s);

But this does not give me the correct value after conversion. Can anybody help.

Answer 1

You should change

BigInteger toHex=new BigInteger(dec,16);

to

BigInteger toHex=new BigInteger(dec,10);
                                     ^

Currently you ask the user for a dec-value, and then interpret the input as a hex-value. (That's why the output is identical to the input.)