Java Eclipse - string wrapping for System.out.println()

Question

I asked for help with this problem in which, when I want to convert bytes from table

`[0, 0, 0, 0, 0, 0, 0, 0, 122, 98, 117, 54, 46, 0, 0, 115, 122, 42, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 116, 121, 116, 117, 108, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 32, 107, 111, 98, 105, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 122, 42, 109, 111, 119, 40, 0, 0, 0, 0, 0, 0, 107, 111, 98, 0, 0, 0, 0, 0, 98, 111, 40]`

into characters and print this characters. When I make:

    for(byte b: byteArray){
        System.out.print((char) b);
    }

I don't have anything on my console. Even the scroll bars are the same length. But when I make:

for(byte b: byteArray){
 System.out.println((char) b);
}

it works good. I think this is eclipse problem, not with the code. I unchecked the limit console output, but it didn't helped.

You are aware that certain encodings are not one-byte-per-char, right? What encoding do you use, and why don't you use the `String(byte[], Charset)` constructor? — fge, Mar 19 '14 at 08:39
@MohammadAdil I was trying also that. But still nothing appears — Rop, Mar 19 '14 at 08:42
@Rop i tried System.out.print((char) b); and in my eclipse console it works fine. There must be something wrong with ur eclipse. And Mohammeds solution worked too. — kai, Mar 19 '14 at 08:46
@kai I guessed, but I don't know what my be wrong with my eclipse — Rop, Mar 19 '14 at 08:48

Roberto · Answer 1 · 2014-03-19T08:54:06.407

I'd try to exclude the non-printable chars, like 0

for(byte b: byteArray){
    System.out.print(b >= 32 ? (char) b : "");
}

You can replace the blank String for whatever you need as "?" or "[ascii_code]"...

I've tested using your data and In my Eclipse (OSX) appears in both cases, my code:

public static void main(String[] args) {
    byte[] bytes =
        { 0, 0, 0, 0, 0, 0, 0, 0, 122, 98, 117, 54, 46, 0, 0, 115, 122, 42, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 116, 121, 116, 117, 108, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 32, 107, 111, 98, 105, 0, 0, 0, 0,
                0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
                0, 0, 0, 0, 0, 0, 0, 122, 42, 109, 111, 119, 40, 0, 0, 0, 0, 0, 0, 107, 111, 98, 0, 0, 0, 0, 0, 98, 111, 40 };
    System.out.println("Init...");
    for (byte b : bytes) {
        System.out.print((char) b);
    }
    System.out.println();
    System.out.println();
    for (byte b : bytes) {
        System.out.print(b >= 32 ? (char) b : "?");
    }
    System.out.println();
    System.out.println("End");
}

The output for that is:

Init...
zbu6.sz*tytul kobiz*mow(kobbo(

????????zbu6.??sz*???????????tytul?????????????????????? kobi????????????????????????????????????????????????????????????????????????????????????z*mow(??????kob?????bo(
End

score 0 · Answer 2 · answered Mar 19 '14 at 08:45

0

char is of 2 byte , if byte number is out of range -128 to 127 ,

answered Mar 19 '14 at 08:45

Vivek Keshri

108
10

score 0 · Answer 3 · answered Mar 19 '14 at 08:50

0

try to do

for(byte b: byteArray){
    System.out.print((char) b);
}
System.out.println();

The method print may be buffered and not shown while you don't print \n

answered Mar 19 '14 at 08:50

Ludovic Feltz

11,416
4
47
63

score 0 · Answer 4 · answered Mar 19 '14 at 08:55

0

the problem is in your environment for sure.

my eclipse console output this with your first loop:

enter image description here

funny thing, i can't copy/paste this output. i think it's \0 bytes fault.

answered Mar 19 '14 at 08:55

Michele Mariotti

7,372
5
41
73

score 0 · Answer 5 · answered Mar 19 '14 at 09:19

The console is reacting badly to the null character \u0000 which is often used as a string terminator.

Eclipse uses SWT which often uses native controls where possible so it may be that there's a defect in the underlying UI toolkit or how SWT uses it.

This has been reported before - Bug 362957 - The Console does not display '\u0000' correctly - so you might want to add your input to the bug report and vote on it.

I would include:

Operating system/version
Eclipse and SWT build versions (look in the plugins directory)
- any changes if any you've made to the stylesheets (e.g. e4_default_gtk.css)
The platform UI toolkit version if applicable (e.g. GTK)
The font - see Preferences
Java version (probably irrelevant)

Java Eclipse - string wrapping for System.out.println()

5 Answers5