Converting String of 0 and 1 to another string

Asked Apr 09 '14 at 16:19

Active Apr 09 '14 at 16:49

Viewed 87 times

I have a string of 0 and 1. I want to convert this string into another string by taking the 8 characters at a time and converting it to an Integer in binary and then casting this Integer to a character.

Code :

String s2="";
String s="10000111";
char nextChar;
for(int i = 0; i < s.length(); i += 8) 
{
     nextChar = (char)Integer.parseInt(s.substring(i, i+8), 2);
     System.out.println(nextChar);
     s2 += nextChar;
}

The code gives the right answer if I run it as a simple java file, but when I run it in a web application, it gives strange results. Why is this, and how can I get the web application to produce the same result?

In desktop application :

http://postimg.org/image/ww88p3ot5/

In web application :

(in browser)

135, 
31, 
120,x 
27, 
192,À 
242,ò 
146, 
128, 
255,ÿ 
14, 
11, 
107,k 
159,

(on output screen)

http://postimg.org/image/ydn9h9nsf/

edited Apr 09 '14 at 16:33

asked Apr 09 '14 at 16:19

user3509463

6

Is this line `String s=10000111;` compile? – Masudul Apr 09 '14 at 16:21
@Masud Sorry, just a typo error. – user3509463 Apr 09 '14 at 16:24
what are these "strange results"? – davioooh Apr 09 '14 at 16:24
1

When the web app gives an output that's different from that of a desktop app, check your encoding. – Sergey Kalinichenko Apr 09 '14 at 16:24
In my console your code print the unicode of 135. – Masudul Apr 09 '14 at 16:29
@dasblinkenlight How to check it ? also i want it to be same as that of my present desktop one.As my further computations depend largely on that – user3509463 Apr 09 '14 at 16:30
What kind of web app? GWT? – Engineer2021 Apr 09 '14 at 16:34
@Masud I want the same in my web app to.Please help – user3509463 Apr 09 '14 at 16:35
3

@user3509463 java tipically use UTF-8 charset, while web tipically uses (old) ISO-8859-1. You can enforce the use of UTF-8 charset (you have to modify header, so tipically is a web-server config) – Lesto Apr 09 '14 at 16:35
@staticx No, a simple one using jsp and servlet in java – user3509463 Apr 09 '14 at 16:35
@lesto How to change it ? Please help – user3509463 Apr 09 '14 at 16:36
@lesto: Java's native encoding is UTF16BE. That doesn't mean it always uses UTF16. The default charset is determined during virtual-machine startup and typically depends upon the locale and charset being used by the underlying operating system. – Engineer2021 Apr 09 '14 at 16:41
@user3509463: See this answer. Implement this: https://stackoverflow.com/a/229022/2591612 – Engineer2021 Apr 09 '14 at 16:42

Converting String of 0 and 1 to another string

0 Answers0