<div>
<blockquote>
Hashtable(why t small? )
</blockquote>
<br />
please advise
</div>


> Hashtable(why t small? )


please advise

<div>
<blockquote>
Hashtable(why t small? )
</blockquote>
<br />
You'd have to ask the guys at Sun (Oracle now) :)<br />
<br />
Naming conventions weren't as well defined when Java first appeared. &nbsp;I wouldn't read much into this.
</div>


> Hashtable(why t small? )


You'd have to ask the guys at Sun (Oracle now) :)

Naming conventions weren't as well defined when Java first appeared.  I wouldn't read much into this.

<div>
<div class="content wysiwyg-content">
I have below &nbsp;java collection related questions. Please advise<br />
why no concrete classcan &nbsp;implement collection interface<br />
what is fifference between collection, collections.<br />
<br />
why vector, stack ,dictionary,Hash<b>t</b>able(why t small? ), Preoprties etc called called legacy classes''<br />
<br />
<br />
why heterogeneous objects not allowed in treeset and treemap<br />
<br />
Please advise
</div>
</div>


I have below  java collection related questions. Please advise
why no concrete classcan  implement collection interface
what is fifference between collection, collections.

why vector, stack ,dictionary,Hashtable(why t small? ), Preoprties etc called called legacy classes''


why heterogeneous objects not allowed in treeset and treemap

Please advise

java collection related questions

Java Enterprise Edition (Java EE) is a specification defining a collection of Java-based server and client technologies and how they interoperate. Java EE specifies server and client architectures and uses profiles to define technology sets targeted at specific classes of applications. All Java EE profiles share a set of common features, such as naming and resource injection, packaging rules and security requirements.

Java EE

Java is a platform-independent, object-oriented programming language and run-time environment, designed to have as few implementation dependencies as possible such that developers can write one set of code across all platforms using libraries. Most devices will not run Java natively, and require a run-time component to be installed in order to execute a Java program.

Java

A programming language is a formal constructed language designed to communicate instructions to a machine, particularly a computer. Thousands of different programming languages have been created, mainly in the computer field, and many more still are being created every year. The description of a programming language is usually split into the two components of syntax (form) and semantics (meaning). Some languages are defined by a specification document (for example, the C programming language is specified by an ISO Standard), while other languages (such as Perl) have a dominant implementation that is treated as a reference. Some languages have both, with the basic language defined by a standard and extensions taken from the dominant implementation being common.