Question

How I can convert negative number into ASCII value?

I have to convert -1 ** into **ASCII value.

That means:

 inputbyte[] = 0
 output[] = -1

I did replacement like:

replacement 0 to -1 in string.

But I cant treat -1 as a number after represent string into Byte[]. I have to handle -1 as a single number like in integer.

Actually My original problem is:

input = "0110110111001000";
output should be = "-111-111-1111-1-11-1-1-1";

after that, I should be able to treat -1 and 1 as numbers i.e Byte.

How can I do that?
thanks in advanced.

Answer 1

I have to convert -1 ** into **ASCII value.

-1(signed char) equals to 127(unsigned char or ASCII value)

127 is DEL code in ASCII table.

To get an int from string:

Integer i = Integer.valueOf("-1");
                             |
                             |
                             here you put your sub-string of "-1"

Strring replacement:

String str="010100100011100011";
String result = str.replaceAll("0", "-1");

Big-integer to string:

String str=my_big_integer.toString();