Iterating over a jdk ByteBuffer

ByteBufIterator.java

public final class ByteBufIterator {
    public static void main(String[] args) {
        ByteBuffer buffer = ByteBuffer.allocate(Integer.BYTES * 10);
        for (int i = 0; i < 10; i++) buffer.putInt(i);

        buffer.flip(); // dont forget to flip!!!

        // read in groups of 3
        // so 4 BBs, 3 of size 3 and 1 of 1
        final int end = buffer.limit(), stride = 3 * Integer.BYTES;

        for (int start = 0; start != end; start = buffer.limit()) {
            int delta = Math.min(end - start, stride);
            buffer.position(start).limit(start + delta);
            consume(buffer.asReadOnlyBuffer());
        }
    }

    private static void consume(ByteBuffer buffer) {
        System.out.println(state(buffer));
        while (buffer.hasRemaining()) System.out.print(buffer.getInt() + "  ");
        System.out.println();
    }

    public static String state(ByteBuffer bb) {
        return String.format("direct: %s, position: %,d, limit: %,d, capacity: %,d",
                bb.isDirect(), bb.position(), bb.limit(), bb.capacity());
    }
}

// Result is as follows: 
// direct: false, position: 0, limit: 12, capacity: 40
// 0  1  2  
// direct: false, position: 12, limit: 24, capacity: 40
// 3  4  5  
// direct: false, position: 24, limit: 36, capacity: 40
// 6  7  8  
// direct: false, position: 36, limit: 40, capacity: 40
// 9