hashtable

These two values will be lost after we get the object back from the hashtable

这两个值将在我们的哈希表中得到对象返回值后被消除

Determines whether the Hashtable contains a specific key .

确定哈希表中是否包含一个指定的键。

The standard utility classes such as Hashtable and Vector also affect Java program performance .

标准实用程序类，如Hashtable和Vector也影响Java程序性能。

Adds an element with the specified key and value into the Hashtable .

添加一个带有指定键和值元素到哈希表。

Removes the element with the specified key from the Hashtable .

从哈希表中移除指定键的元素。

You have to construct a hashtable to contain the blog post information .

必须构造一个包含blog帖子信息的散列表。

The tag works like a Hashtable , defining a key / value pairing to set the properties .

标签就像一个Hashtable，它定义一个键/值对来设置属性。

The disk forms of Hashtable and HashMap are different and incompatible .

Hashtable和HashMap在磁盘上的格式是不相同、不兼容的。

To do this , you simply use a hashtable or a similar collection to store the XML documents .

为此，您只需使用一个hashtable或者一个类似的集合来存储XML文档。

However , the thread-safety came at a price & all methods of Hashtable were synchronized .

然而，线程安全性是凭代价换来的――Hashtable的所有方法都是同步的。

Each SharedObject instance has a data property that can be thought of as a hashtable for storing data .

每个SharedObject实例都有一个数据属性，可以看作存储数据的哈希表。

If name does not correspond to a key in the hashtable , then null will simply be returned .

如果哈希表中没有与键值对应的名称，将返回null。

When we create a new instance of a Hashtable , we have to pass type arguments to specify the types of Key and Value .

创建一个新的Hashtable实例时，必须传递类型参数以指定Key和Value的类型。

Hashtable provided an easy-to-use , thread-safe , associative map capability , and it was certainly convenient .

Hashtable提供了一种易于使用的、线程安全的、关联的map功能，这当然也是方便的。

For this specific example , it turned out that the primary culprit was a font manager class that contained a static hashtable .

就本例而言，最后查明罪魁祸首是包含一个静态hashtable的字体管理器类。

The code only changed from the previous example in only one place : the values placed in the PROVIDER_URL key of the environment Hashtable object .

相对于前一个示例，此代码仅在一个地方进行了更改：放在环境Hashtable对象的PROVIDERURL键中的值。

Therefore , this static hashtable , which essentially existed for the life of the application itself , was never removing the keys that referenced each form .

因此，这个静态hashtable（在应用程序的生存期内一直存在）永远不会删除引用每个窗体的那些键。

Threading : Oniguruma uses global locks when initializing code range tables or managing shared AST nodes ( like Character Class hashtable ) .

多线程：Oniguruma在初始化代码范围表或者管理共享的AST节点（如Character类散列表）时，使用全局锁。

In this case , the SharedObject is looked up , and the name parameter is used to look up the saved object from the data hashtable .

本例中，已搜索到SharedObject，并且name参数已用于从数据哈希表中搜索已存储的对象。

The various forms could be zoomed in or out independently , so the hashtable contained a vector with all of the fonts for a given form .

各个窗体可被单独放大或缩小，所以这个hashtable包含一个具有某个给定窗体的全部字体的vector。

In a given program , the types of elements we use as keys , and the types of values we store in the hashtable , will not be arbitrary objects .

那么在给定的程序中，被用作键的元素类型和存储在散列表中的值类型，将不能是任意对象。

The bigger problem with the synchronized Collections wrappers , and the earlier Hashtable and Vector classes , is that they synchronize on a single lock .

同步的集合包装器以及早期的Hashtable和Vector类带来的更大的问题是，它们在单个的锁上进行同步。

But in the Java language versions that exist today , it is impossible to declare that the particular keys and elements of a hashtable have types more specific than Object .

但是在目前现有的Java语言版本中，不可能将散列表的特定键和元素声明为比Object更具体的类型。

After tracing back through the list of referrers , I found that the root node was a static hashtable that stored the fonts in use for each form .

通过逆向追踪引用者列表，我发现根节点是用来存储每个窗体所用字体的一个静态hashtable。

On the other hand , that 's no worse than the current situation ; you can 't pass an int as a key to Hashtable because all keys must be of type Object .

另一方面，当前的这种情况是最糟的；您不能将int作为键传递给Hashtable，因为所有的键都必须是Object类型。

For example , you can create a Map ( Ruby calls them " hashes ", even though a hashtable is only one way a map can be implemented ) with a simple syntax like

例如，你可以用一个简单语法创建一个Map（Ruby称之为“hashes”，尽管hashtable只是map一种可能的实现方式），如

ConcurrentHashMap may be used as a replacement for synchronizedMap or Hashtable in any application that does not rely on the ability to lock the entire table to prevent updates .

在任何不依赖于锁整个表来防止更新的应用程序中，可以使用ConcurrentHashMap来替代synchronizedMap或Hashtable。

SharedClassTokenHelper : This helper effectively turns the shared class cache into a simple hashtable & classes are stored against string key tokens that are meaningless to the cache .

SharedClassTokenHelper：这个helper实际上将共享类缓存转换为一个简单的哈西表&类按照一个对于缓存无意义的字符串键标志进行存储。

Pay particular attention to these lines in this listing : ( 1 ): The UrlArguments class is a small utility class that parses the URL arguments into a hashtable object .

请特别注意清单中的以下代码行：（1）：UrlArguments类是一个小型实用工具类，它将URL参数解析为散列表对象。

These compromises enable ConcurrentHashMap to provide far superior scalability over Hashtable , without compromising its effectiveness in a wide variety of common-use cases , such as shared caches .

上述改进使得ConcurrentHashMap能够提供比Hashtable高得多的可伸缩性，而且，对于很多类型的公用案例（比如共享的cache）来说，还不用损失其效率。