public void copy(ByteData src, long srcPos, long destPos, long length) {
        for(long i=0;i<length;i++) {
            set(destPos++, src.get(srcPos++));
        }
    }
public void copy(ByteData src, long srcPos, long destPos, long length) {
        for(long i=0;i<length;i++) {
            set(destPos++, src.get(srcPos++));
        }
    }
public void copy ( ByteData src , long srcPos , long destPos , long length ) { for ( long i = 0 ; i < length ; i ++ ) { set ( destPos ++ , src . get ( srcPos ++ ) ) ; } }
Copy bytes from another ByteData to this array.

@param src the source data
@param srcPos the position to begin copying from the source data
@param destPos the position to begin writing in this array
@param length the length of the data to copy
Copy bytes from another ByteData to this array .