Guava 19.0 RC1 发布，主要改进： common.base Added CharMatcher static factory methods equivalent to the CharMatcher constants. For example, added CharMatcher.whitespace() which is equivalent to CharMatcher.WHITESPACE. Eventually, the constants will be deprecated and removed. This is being done because using constants requires a large number of classes to be initialized when anything from CharMatcher is used; switching to static factory methods allows classes to be initialized only as needed for the type of CharMatcher actually being used. Added Throwables.lazyStackTrace(Throwable) - Returns a List<StackTraceElement> that may load the stack trace elements lazily. Useful if you want to get only the first N elements of the stack trace efficiently. Added lazyStackTraceIsLazy()- Returns whether or not the above method is able to use the special implementation that makes it lazy on the current platform. Added VerifyException constructor overloads taking a Throwable cause. common.cache This package has graduated from @Beta, making it safe to use in library code. Added visibility of CacheLoader.UnsupportedLoadingOperationException Added RemovalNotification.create These should only be needed if creating a custom cache implementation common.collect Added factory and builder methods for various ImmutableMaps and ImmutableMultimaps that take Iterable<Map.Entry>. Added FluentIterable.toMultiset() Added RangeSet.asDescendingSetOfRanges() and RangeMap.asDescendingMapOfRanges() Added Lists.cartesianProduct(List...) and Lists.cartesianProduct(List<List>>) Added Maps.newLinkedHashMapWithExpectedSize(int) Re-added Multisets.removeOccurrences(Multiset, Multiset) which was (binary incompatibly) missing in 18.0 because it was replaced with Multisets.removeOccurences(Multiset, Iterable) Deprecated MapConstraint and MapConstraints Deprecated Sets.newSetFromMap(Map) - Java 6 provides Collections.newSetFromMap(Map) Removed MapMaker.softValues() common.eventbus Added EventBus.identifier() Removed protected method AsyncEventBus.dispatchQueuedEvents() (made package-private) common.hash Added BloomFilter.create overloads taking a long for the expectedInsertions Added Hashing.sha384() Added Hashing.concatenating(HashFunction, HashFunction, HashFunction...) and Hashing.concatenating(Iterable<HashFunction>) common.io Added ByteSource.sizeIfKnown() Added CharSource.length() Added CharSource.lengthIfKnown() common.net Added a couple new constants to HttpHeaders and MediaType Updated public suffix list for InternetDomainName common.reflect Added TypeToken.isSubtypeOf(TypeToken), TypeToken.isSupertypeOf(TypeToken) and overloads of both that take a Type Deprecated TypeToken.isAssignableFrom(TypeToken) and TypeToken.isAssignableFrom(Type) - isSupertypeOf provides equivalent behavior with a less confusing name common.util.concurrent Added AbstractFuture.newCancellationCause() Added AbstractFuture.setFuture(ListenableFuture) Added Futures.getChecked Added Futures.catching and Futures.catchingAsync Added Futures.transformAsync Added Futures.withTimeout Deprecated FutureFallback and Futures.withFallback methods - these are replaced with Futures.catching Deprecated Futures.get methods taking a Class<X extends Exception> - these are replaced with Futures.getChecked Deprecated Futures.transform methods taking an AsyncFunction - these are replaced with Futures.transformAsync 详细改进请看发行说明。 下载：https://github.com/google/guava/archive/v19.0-rc1.zip。 GuavaGuava (GWT) Maven Identifiercom.google.guava:guava:19.0-rc1com.google.guava:guava-gwt:19.0-rc1 Jarguava-19.0-rc1.jarguava-gwt-19.0-rc1.jar Javadocguava-19.0-rc1-javadoc.jarguava-gwt-19.0-rc1-javadoc.jar Sourcesguava-19.0-rc1-sources.jarguava-gwt-19.0-rc1-sources.jar Guava 中文是石榴的意思，该项目是 Google 的一个开源项目，包含许多 Google 核心的 Java 常用库。 目前主要包含： com.google.common.annotations com.google.common.base com.google.common.collect com.google.common.io com.google.common.net com.google.common.primitives com.google.common.util.concurrent 在线API doc：http://tool.oschina.net/apidocs/apidoc?api=guava Guava 19.0 RC1 发布，Google 的 Java 常用类库下载地址
