Java – how to encode stream findNth()？

And stream Similar to findfirst(), is there any way to write stream findNth()？

I'm practicing Java 8. 0 by rewriting some legacy code Also, I want to know how to write the following functions using the stream API

static curPipeNumber = 0;

/** skipToEntry() updates 'curPipeNumber' to 'pipeNumber' and returns the first byte position of the word before the ('pipeNumber')-th pipe.
 * It does so by reading and ignoring unnecessary bytes from the buffer.
 * e.g.,*/
static int skipToEntry(byte[] buf,int len,int nextByteToBeRead,int pipeNumber) {

    if(curPipeNumber == pipeNumber)
        return nextByteToBeRead;

    for(; nextByteToBeRead < len; nextByteToBeRead++) {
        if(buf[nextByteToBeRead] == '|') {
            ++curPipeNumber;
            if(curPipeNumber == pipeNumber) {
                return ++nextByteToBeRead;              
            }
        }
    }

    return nextByteToBeRead;
}

I hope it will translate into:

static int skipToEntry(byte[] buf,int pipeNumber) {     
    if(curPipeNumber == pipeNumber)
        return nextByteToBeRead;

    OptionalInt pipeIndex = IntStream.range(i,len)
             .filter(n -> buf[n] == '|')
                 .findNth(pipeNumber);

            curPipeNumber = pipeNumber;
            nextByteToBeRead = pipeIndex.getAsInt() + 1;

    return nextByteToBeRead;
}

Solution

OptionalInt result = stream.skip(n-1).findFirst();

OptionalInt result = stream.skip(n-1).findFirst();