C++ convert to Java?

[wizious]

Hello, I am currently converting a C++ program into Java, but I cannot find the equivilant to UCHAR_MAX in Java. Does anyone know this?

[JosAH]

Look at the static constants in the Character class. I think the one you
want is MAX_VALUE.

kind regards,

Jos

[wizious]

I have a statement,

ColorJitter::ColorJitter() // Class constructor
{
int i; // Loop index
status = TRUE;
// Initialize jitter lookup table pointers
pirand = NULL;
pxrand = NULL;
pyrand = NULL;
noise = 1; // Set default noise level

if ((pirand = new int[C_TableSize]) == NULL)
{
status = FALSE;
return;
}


"status" as already been defined as a boolean in a previous class which this extends. I want to convert the if statement to Java but I am having trouble doing this.the reference "C_TableSize" has been declared in a previous class which this extends as well, it has declared:

public static final int C_TableSize = 1024;


Does anyone have any suggestions?

[JosAH]

Does anyone have any suggestions?

What suggestion? A public static final int variable should be visible in a subclass.
What exactly is the problem then? Don't say "it doesn't work" please. Give us
compilation and/or runtime error messages.

kind regards,

Jos

[wizious]

well if I enter " if ((pirand = new int[C_TableSize]) == NULL) "

straight into Java, I get a " ')' expected" error at the line where the if statement is declared.

At first I tried rewriting it as a " if ((pirand = int[] C_TableSize == null)" statement instead, I get a ".class expected" error instead.

I think the most likely error is that I dont know what they are trying to do in the initial c++ code, so therefore its much harder for me to find a way to implement it in Java.

Regards,

[JosAH]

well if I enter " if ((pirand = new int[C_TableSize]) == NULL) "

straight into Java, I get a " ')' expected" error at the line where the if statement is declared.

At first I tried rewriting it as a " if ((pirand = int[] C_TableSize == null)" statement instead, I get a ".class expected" error instead.

I think the most likely error is that I dont know what they are trying to do in the initial c++ code, so therefore its much harder for me to find a way to implement it in Java.

Regards,

Try to change that NULL to lowercase null in that first version. Java doesn't know
anything about defined values but it does know what null (lowercase) is.

kind regards,

Jos

ps. it's rather hopeless to try to translate something from language A to language B
when you don't know what language A does ...

[Laharl]

That won't work no matter how you tweak it, since Java doesn't support inline assignments. Just assign it before the if, then check if it's null.

[JosAH]

That won't work no matter how you tweak it, since Java doesn't support inline assignments. Just assign it before the if, then check if it's null.

*ahem*, slight correction: in Java an assignment token is an operator and an
assignment is an expression so you can do things like this:

if ((foo= new int[42]) != null) 
 

Of course some people don't find it readable; but it is still perfectly valid.

kind regards,

Jos

[Laharl]

Huh, you learn something new every day. I'd figured they'd disallowed that to avoid the fun in C that you get with that when you forget that second =.