Why a char default value is not displayed on console?

I wanted to know what will it get displayed on console when you try to print a char default value. But unfortunately, I can't see anything on the console. why?

I should be able to see 0 right. As the default value of a char variable is a null character i.e., '\u0000' (Its decimal equivalent is 0) ? Correct me if I'm wrong.

Code: 

public class Index {
    static char c;
    public static void main(String[] args) {
        System.out.println("char default value is: "+Index.c);
    }
}

Output console:

enter image description here

Jon Skeet
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quotationmark

There's a big difference between the character for "the decimal digit 0" which is U+0030... and U+0000, the null character, which is a control character and so has no printed output. You're printing out the latter, so I wouldn't expect to see 0.

To think about it another way, consider:

System.out.println("a\u0009b");

Would you expect that to print "a9b"? You shouldn't because U+0008 is the tab character, so you'd see something like "a b" with some variable number of spaces between depending on exactly what your output device does.

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