论IO流之ByteArrayInputStream

? ? ? ByteArrayInputStream继承自InputStream抽象类,是以内存中的一个字节数组作为流来进行读写操作。在该流内中包含一个内部缓冲区数组，该缓冲区包含从流中读取的字节。源码如下:

/**     * Skips n bytes of input from this input stream. Fewer      * bytes might be skipped if the end of the input stream is reached.      * The actual number k     * of bytes to be skipped is equal to the smaller     * of n and  count-pos.     * The value k is added into pos     * and k is returned.     *     * @param   n   the number of bytes to be skipped.     * @return  the actual number of bytes skipped.     */public synchronized long skip(long n) {if (pos + n > count) {    n = count - pos;}if (n < 0) {    return 0;}pos += n;return n;}