Write Java String as XDR string. Definition of XDR string from RFC 4506:
The standard defines a string of n (numbered 0 through n-1) ASCII bytes to be the number n encoded as an unsigned integer (as described above), and followed by the n bytes of the string. Byte m of the string always precedes byte m+1 of the string, and byte 0 of the string always follows the string's length. If n is not a multiple of four, then the n bytes are followed by enough (0 to 3) residual zero bytes, r, to make the total byte count a multiple of four. Counted byte strings are declared as follows: string object; or string object<>; The constant m denotes an upper bound of the number of bytes that a string may contain. If m is not specified, as in the second declaration, it is assumed to be (2**32) - 1, the maximum length. The constant m would normally be found in a protocol specification. For example, a filing protocol may state that a file name can be no longer than 255 bytes, as follows: string filename<255>; 0 1 2 3 4 5 ... +-----+-----+-----+-----+-----+-----+...+-----+-----+...+-----+ | length n |byte0|byte1|...| n-1 | 0 |...| 0 | +-----+-----+-----+-----+-----+-----+...+-----+-----+...+-----+ |<-------4 bytes------->|<------n bytes------>|<---r bytes--->| |<----n+r (where (n+r) mod 4 = 0)---->| STRING It is an error to encode a length greater than the maximum described in the specification.