static char doesnt display in System.out.println()

[Praveen Babu]

Hi All,

static char c;
 
In Main method 
 
System.out.println(c);

doesnt give any thing and blocks all next statements from displaying

while,

int a;
static char c;
 
System.out.println(a+c);  

returns 0 // this is ok
Why is this so ?

Bye & Regards,
Praveen

[ August 02, 2006: Message edited by: praveen babu ]
[ August 02, 2006: Message edited by: praveen babu ]

[wise owen]

you did not init. c variable and the default value is '\u0000' (invisible).

[Praveen Babu]

Hi,

If default value is invisible then how come it took part in the arithmetic
calculation in the next code and why is it blocking code below it to display. Please can you clarify ?

Regards,
Praveen

[wise owen]

15.18.2 Additive Operators (+ and -) for Numeric Types

Binary numeric promotion is performed on the operands (�5.6.2). The type of an additive expression on numeric operands is the promoted type of its operands. If this promoted type is int or long, then integer arithmetic is performed; if this promoted type is float or double, then floating-point arithmetic is performed.

"a + c" will be an int '0'.
[ August 02, 2006: Message edited by: wise owen ]

[Praveen Babu]

Hi,

Thanks Wise for your reply,

-Now i know why the final output is 0.
-Is the compiler unable to display the '\u0000' (invisible) char ? Is this the reason why it doesnt print lines after it
for example,

char c = '\u0000';
System.out.println(c);
System.out.println("hello");

In the above code hello is not printed.

Please clarify,

Regards,
Praveen
[ August 02, 2006: Message edited by: praveen babu ]

[wise owen]

I use Window XP and Java 5.0. Your code printed out a rectang graphics and Hello string.

[Praveen Babu]

Hi wise,

Thanks you. Actually i am compiling it from an editor(Edit plus) which is not displaying it.From command line iam able to see hello.

Thank You & Regards,

Praveen