Quick Java Question

[CrackaLackaZe]

How do I convert a double array to a float array?

 

[Kilrsat]

You can't cast the arrays themselves. Yout need to create another array and cast the individual elements.

You would need something like:

 

[CrackaLackaZe]

damnit...part of the assignment was to write a code with a method set to recieve a float array from a double array from main. And I can't use for loops...it has to all be done recursively. I have all of it written but can't get around this problem.

I guess I could do what you suggested recursively, but are there any more elegant ways around this?

 

[Kilrsat]

Here is a recursive conversion.

The for loop is much more efficient, but this meets the criteria you gave.

 

[AFB]

Originally posted by: CrackaLackaZe
damnit...part of the assignment was to write a code with a method set to recieve a float array from a double array from main. And I can't use for loops...it has to all be done recursively. I have all of it written but can't get around this problem.

I guess I could do what you suggested recursively, but are there any more elegant ways around this?

How about a while loop? 🙂

<-smartass

 

[Kilrsat]

Originally posted by: amdfanboy

Originally posted by: CrackaLackaZe
damnit...part of the assignment was to write a code with a method set to recieve a float array from a double array from main. And I can't use for loops...it has to all be done recursively. I have all of it written but can't get around this problem.

I guess I could do what you suggested recursively, but are there any more elegant ways around this?

How about a while loop? 🙂

<-smartass

He wanted to convert a double[] to a float[], not a float[] to a double[] 😉

<-- smarterass

 

[beyonddc]

To get this right, first, you shouldn't use casting.

Take a look at the Java API for - double
http://java.sun.com/j2se/1.4.2...uble.html#floatValue()
You should be using Double.floatValue() to let a Double variable to return you back with a float object.

 

[kamper]

Originally posted by: beyonddc
To get this right, first, you shouldn't use casting.

Take a look at the Java API for - double
http://java.sun.com/j2se/1.4.2...uble.html#floatValue()
You should be using Double.floatValue() to let a Double variable to return you back with a float object.

Sure, if he was dealing with Doubles, but he's not; he's dealing with doubles. Besides which, the implementation of floatValue() casts a double to a float anyways so it wouldn't make any difference.

Edit: p.s. Kilsrat, good to see you answering the noob questions 😉

 

[AFB]

Originally posted by: Kilrsat

Originally posted by: amdfanboy

Originally posted by: CrackaLackaZe
damnit...part of the assignment was to write a code with a method set to recieve a float array from a double array from main. And I can't use for loops...it has to all be done recursively. I have all of it written but can't get around this problem.

I guess I could do what you suggested recursively, but are there any more elegant ways around this?

How about a while loop? 🙂

<-smartass

He wanted to convert a double[] to a float[], not a float[] to a double[] 😉

<-- smarterass

Same thing, right? 😕