convert string to hexadecimal string

Question

i have a string of int value like "131008130225002" i need to convert it to hexadecimal string. I tried various ways,

output of toHex function is 313331303038313330323235303032 but i do not need it,
i need in hexadecimal format using ABC upto 12 places.
I tried Integer.tohex, but it is out of range of integer
In case of Double.tohex it gives 0x1.dc9ad4424da8p46

My friend is doing same job in ios using unsigned long long as datatype and 0x%02llx regular expression to convert nsstring

code is:

String x="131008130225002"; 
System.out.println(x);
    // System.out.println(Integer.parseInt(x));
     System.out.println(Double.parseDouble(x));
     System.out.println(Double.toHexString(Double.parseDouble(x)));
     String a1= toHex(x);
     System.out.println(a1);

toHex function:

static String toHex(String arg) {
    try {
        return String.format("%12x", new BigInteger(1, arg.getBytes("UTF-8")));
    } catch (UnsupportedEncodingException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    return null;
}

It's not clear what you're trying to do. Is your string a decimal number that you want to convert to hex? Or is a sequence of decimal numbers, of which you want to convert each one separately to hex? Show the expected output for your input. — Aleks G
– Aleks G, Commented Oct 8, 2013 at 7:51
it is a combination of decimals retrived from different places, now i want to convert it to hex and pass as a parameter — HimanshuR
– HimanshuR, Commented Oct 8, 2013 at 7:53
@HimanshR post the exact result you want to see from the conversion A single exact result says more than 1000 words, post that please... — ppeterka
– ppeterka, Commented Oct 8, 2013 at 7:55
@Hitmansh You are not making it any clearer. Show the exact result you want to achieve with your input. — Aleks G
– Aleks G, Commented Oct 8, 2013 at 7:57
sorry for my incapability to explain and thanks for your efforts, but answers below are exactly what i need. — HimanshuR
– HimanshuR, Commented Oct 8, 2013 at 8:01

Yurii Shylov · Accepted Answer · 2013-10-08 07:54:53Z

2

String x = "131008130225002";
System.out.println(new BigInteger(x).toString(16));

The output is 7726b510936a.

answered Oct 8, 2013 at 7:54

Yurii Shylov

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Bernhard Barker · Accepted Answer · 2013-10-08 07:56:39Z

1

It will fit in a long, so you can use Long.toHexString.

System.out.println(Long.toHexString(Long.parseLong("131008130225002")));

For a more generic solution, BigInteger also has a toString function which takes in a radix (16 being hex of course).

System.out.println(new BigInteger("131008130225002").toString(16));

Both of the above print out 7726b510936a.

answered Oct 8, 2013 at 7:56

Bernhard Barker

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