我正在嘗試使用 LRU 緩存，如此處所示Java time-based map/cache with expiring keys我的代碼：import com.google.common.cache.CacheBuilderimport java.util.concurrent.TimeUnitfun main(args: Array<String>) {val cache = CacheBuilder.newBuilder().maximumSize(100).    expireAfterAccess(10, TimeUnit.HOURS)    .build<String, String>()    cache.put("a", "blah")    val x = cache.getIfPresent("a")    cache.stats().also { println(it) }    println(x)}輸出：CacheStats{hitCount=0, missCount=0, loadSuccessCount=0, loadExceptionCount=0, totalLoadTime=0, evictionCount=0}blah我期待hitCount的是 1，而不是 0。我在這里想念什么？