Does anybody know how ArrayCopy WORKS?

Hello all,
Can anybody know how arraycopy works for two dimensional arrays? If I want to copy the 4th row of the source array to the 4th row of a destination array,
public static void arraycopy(Object src,
int src_position,
Object dst,
int dst_position,
int length)
then what should be the src_position? Is it calculated based on the row number?

There are no "two dimensional arrays" in Java. Java has only one-dimensional arrays, which can hold elements that are primitives or references. An array can store references to other arrays, and thus appear to be "multidimensional".
There are several possible answers to your question.
There may be no need to "copy", just assign the reference of element 3 in the array to the subarray in the source array:
src[3] = dst[3];Or, you may want to actually copy the data between the two subarrays:
System.arraycopy(src[3], 0, dst[3], 0, dst[3].length);Sorry if this is a far more complicated answer than you wanted, but if you truly understand how arrays of arrays in Java work, it will all become crystal clear!

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