Print string with null character in java

Question

I have string which contains null character ie \0. How can I print the whole string in java?

String s = new String("abc\u0000def");
System.out.println(s.length());

System.out.println(s);

Output on eclipse console:

7
abc

Length is that of complete string, but how can I print the whole string?

UPDATE: I am using

Eclipse Helios Service Release 2

Java 1.6

Works for me (Eclipse console), output is `7abc def` - on what system, and on which console, did you start the program? — Andreas Fester, Mar 11 '13 at 11:33
It prints `abc def`. What else do you expect it to print? (There is no space actually between abc & def, its a null char there, but it prints though) — Rahul, Mar 11 '13 at 11:34
btw, there's no good reason to write new String("abc\u0000def") in this context. "abc\u0000def" would suffice. — Sean Patrick Floyd, Mar 11 '13 at 11:35
Do you want `abc def` as output or do you literally want `abc\u0000def`? — Quetzalcoatl, Mar 11 '13 at 11:52
@Quetzalcoatl I just want that all the printable chars are printed, and whatever is printed for unprintable chars. — , Mar 11 '13 at 13:59

score 3 · Answer 1 · answered Mar 11 '13 at 11:43

3

Converting the String to char array is an alternative. This works for me:

System.out.println(s.toCharArray());

Which outputs abcdef to the console (eclipse).

answered Mar 11 '13 at 11:43

Boann · Accepted Answer · 2013-03-11T16:19:55.110

If Eclipse won't cooperate, I'd suggest replacing the null characters with spaces before printing:

System.out.println(s.replace('\u0000', ' '));

If you need to do this in a lot of places, here's a hack to filter them from System.out itself:

import java.io.*;

...

System.setOut(new PrintStream(new FilterOutputStream(
        new FileOutputStream(FileDescriptor.out)) {
    public void write(int b) throws IOException {
        if (b == '\u0000') b = ' ';
        super.write(b);
    }
}));

Then you can call System.out methods normally, with all the data going through the filter.

score 1 · Answer 3 · edited Mar 11 '13 at 11:35

1

the correct output of your code using Java 5 or higher is

public class TestMain
{
    public static void main(String args[])
    {
        String s = new String("abc\u0000def");
        System.out.println(s.length());
        System.out.println(s);
    }
}

7
abc def

edited Mar 11 '13 at 11:35

Sean Patrick Floyd

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answered Mar 11 '13 at 11:34

Joe2013

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Print string with null character in java

3 Answers3

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