Byte array to int array with streams

Question

I am trying to do a bitwise operation on a byte array with streams but it gives me the error that says "Inconvertible types; cannot cast 'byte[]' to 'int'". I want to bitwise every item in the byte array with 0xff via streams.

byte[] packet;
//this does not work
Stream.of(packet).parallel().map(e->(int)e&0xff)//then put int into an  array or list

//basically this is what I am trying to do with streams
    int[] castedValues = new int[packet.length];
    for (int i = 0; i < packet.length; i++) {
        castedValues[i] = packet[i];
    }

shmosel · Accepted Answer · 2018-08-03 23:40:09Z

3

Java doesn't have a byte stream. But you can iterate over the indexes instead:

IntStream.range(0, packet.length)
        .map(i -> packet[i] & 0xff)

I wouldn't bother with parallel() unless you're doing some heavy processing.

answered Aug 3, 2018 at 23:40

shmosel

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1 Comment

rgettman Over a year ago

Just put .toArray() on the end and this will work.

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