正数递增器

import java.util.concurrent.atomic.AtomicInteger;/** * @description * @author apple */public class PositiveCounter {    private final AtomicInteger atom;    private static final int mask = 0xFF;    public PositiveCounter() {        atom = new AtomicInteger(0);    }    public final int incrementAndGet() {        final int rt = atom.incrementAndGet();        return rt & mask;    }    public int intValue() {        return atom.intValue();    }}