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javahexbiginteger

How to convert BigInteger value to Hex in Java

I am making a Java program. I have a BigInteger number and I need to convert it to Hexadecimal. I tried the following code:

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);

However, this does not give me the correct value after conversion. I am not sure how I can achieve the desired output.

Any help is welcome.

Solution

  • 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.)