- Related Questions on StackOverflow
- Convert hex string to integer
HI I want to get exact integer value from hex string.

My problem is I have an integer value as

`-25`

and its hex String is "E7"but when I convert -25 using

`public static String toHexString(int i) { String hexString = Integer.toHexString(i); if (hexString.length() % 2 != 0) { hexString = "0" + hexString; } return hexString.toUpperCase();}`

the above function It returns "FFFFE7"

and when I convert it to get decimal value which is

`231`

using`int len =Integer.parseInt(Hex,16);`

I get Error "Invalid Int"

but when I convert it to integer value manually as

`int len =Integer.parseInt("E7",16);`

I get result as 231.

so can anyone tell me how can I get exact integer by passing whole hexadecimal string ??

as my hex string is dynamic so i can't fix it .

- Converting A String To Hexadecimal In Java
I am trying to convert a string like "testing123" into hexadecimal form in java. I am currently using BlueJ.

And to convert it back, is it the same thing except backward?

- Python hex string operation: need to preserve the leading zeros
I have two numbers:

a = "00000108"

b = "FFFFF9FF"

I want to compute the bitwise AND of the hex values in the two strings. The result I want is a string:"00000108"

Here is what I have come up with:

`def fixedAND(a, b): ''' The a and b are both strings ''' return ''.join([hex(ord(i) & ord(j))[2:] for i,j in zip(a.decode('hex'), b.decode('hex'))])`

This function returns "0018". It suppresses the leading zeros for each of the two hex digit pairs.

- Converting a String to Hex in iOS?
I'm basically letting the user enter a hexadecimal value in a UITextField and write it into a string to use it for color picking (educational purpose). How do i convert a string to hex?

- Convert string to hexadecimal on command line
I'm trying to convert "Hello" to

`48 65 6c 6c 6f`

in hexadecimal as efficiently as possible using the command line.I've tried looking at

`printf`

and google, but I can't get anywhere.Any help greatly appreciated.

Many thanks in advance,

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