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Question

Hi All,
Coming from a C/C++ background, please assist us with the following:
1) Is there an equivalent in java for "memset" and "memcpy". I have an array of bytes:
byte[] bTxBuffer = new byte(512);
and I hava a need to set all the array elements with '0' using one command as opposed to set a (for i=0; i <5122; i++) ...
In C++ we do memset(&bTxBuffer, 0 , 512);
Likewise I need to copy a chunck of data to the byte array using one statement, like memcpy.
2) How can I cast integer to byte. I have the following:
int iAddress = 12;
byte[] bTxBuffer = new byte(512);
I've tried:
bTxBuffer[4] = (byte)iAddress;
but the compiler complains about loss of precision. The variable iAddress value will never be more than 255, but it needs to be type integer for other reasons;
Thanks in advance
Regards,
Trajano

Answer 1

http://java.sun.com/j2se/1.4.1/docs/api/java/util/Arrays.html
public static void fill(int[] a, int fromIndex, int toIndex, int val)
should take care of that memset problem.
memcpy ? i didn't find exact method, but search the api, maybe System has somethint (i didn't look there)
if you know that iAddress is never more than 255, then you actually don't lose any precision, but the compiler doesn't know that, thats why it is warning you.
BTW:
java.lang.System:
arraycopy(Object src, int srcPos, Object dest, int destPos, int length)
you wellcome