Question

Sorry for really stupid question, I’m learning a new language and taking this code:

public class Exercise01 {
    int i;
    char c;

    public static void main(String[] args) {

        Exercise01 E = new Exercise01();
        System.out.println("i = " + E.i);
        System.out.println("c = [" + E.c + "]");
    }
}
/* Output:
i = 0
c = [
*/

Why the output does not produce “]” character? Has it something to do with Unicode?

PostEdited: the variable E.c was not initialized for experimentation purpose.

Answer 1

You are trying to print the null character as your char c hasn’t need initialised. i.e. \0 Interestingly you can’t copy and paste this character easily as most C code sees this as an end of string marker.

I see the ] when I run the code.

Try changing your code with

char c = '?';

gives me an output of

i = 0
c = [?]

---

One way to reproduce this problem is to run on unix

java Main | more

which outputs

i = 0
c = [