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(); }}