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abbr="ChapTitle"> Runtime Environment Specification for the
Java Card Platform, Version 2.2.2
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<hr size="7" noshade="noshade"><a name="pgfId-6072"></a>Preface
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<p class="Paragraph"><a name="pgfId-7132"></a>Java Card<img
src="shared/chars/tm.gif" title="trademark" alt="trademark">
technology combines a portion of the Java<img src="shared/chars/tm.gif"
title="trademark" alt="trademark"> programming language with a runtime
environment optimized for smart cards and related, small-memory
embedded devices. The goal of Java Card technology is to bring many of
the benefits of the Java programming language to the
resource-constrained world of smart cards.
</p>
<p class="Paragraph"><a name="pgfId-7133"></a>This document is a
specification of the Java Card Platform, Version 2.2.2, Runtime
Environment (Java Card Runtime Environment or Java Card RE). A vendor
of a Java Card technology-enabled device provides an implementation of
the Java Card RE. A Java Card RE implementation within the context of
this specification refers to a vendor's implementation of the virtual
machine (VM) for the Java Card platform (Java Card virtual machine or
Java Card VM), the Java Card Application Programming Interface (API),
or other component, based on the Java Card technology specifications. A
"reference implementation" is an implementation produced by Sun
Microsystems, Inc. Application software written for the Java Card
platform is referred to as a Java Card technology-based applet (Java
Card applet or card applet).
</p>
<h2 class="Head1P"><a name="pgfId-7134"></a>
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Who Should Use This Specification</h2>
<p class="Paragraph"><a name="pgfId-7135"></a>This specification is
intended to assist implementers of the Java Card RE in creating an
implementation, developing a specification to extend the Java Card
technology specifications, or in creating an extension to the runtime
environment for the Java Card platform. This specification is also
intended for Java Card applet developers who want a greater
understanding of the Java Card technology specifications.
</p>
<h2 class="Head1P"><a name="pgfId-7136"></a>
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Before You Read This Specification</h2>
<p class="Paragraph"><a name="pgfId-7137"></a>Before reading this
guide, you should be familiar with the Java programming language, the
other Java Card technology specifications, and smart card technology. A
good resource for becoming familiar with Java technology and Java Card
technology is the Sun Microsystems, Inc. web site, located at
</p>
<p class="Paragraph"><a name="pgfId-11212"></a><a
href="http://java.sun.com" class="URL"></a><kbd class="URL"><a
href="http://java.sun.com" class="URL">http://java.sun.com</a></kbd>
</p>
<h2 class="Head1P"><a name="pgfId-6511"></a>
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How This Specification Is Organized</h2>
<p class="Paragraph"><a name="pgfId-7143"></a><a
href="JCRESpec01intro.html#42420" class="XRef">Chapter 1</a>,
"Introduction," gives an overview of the information contained in this
specification.
</p>
<p class="Paragraph"><a name="pgfId-7144"></a><a
href="JCRESpec02vmlife.html#37109" class="XRef">Chapter 2</a>,
"Lifetime of the Java Card Virtual Machine," defines the lifetime of
the Java Card virtual machine.
</p>
<p class="Paragraph"><a name="pgfId-7145"></a><a
href="JCRESpec03appletlife.html#64379" class="XRef">Chapter 3</a>,
"Java Card Applet Lifetime," defines the lifetime of an applet.
</p>
<p class="Paragraph"><a name="pgfId-7146"></a><a
href="JCRESpec04selection.html#57085" class="XRef">Chapter 4</a>,
"Logical Channels and Applet Selection," describes how the Java Card RE
handles applet selection.
</p>
<p class="Paragraph"><a name="pgfId-7147"></a><a
href="JCRESpec05transient.html#20735" class="XRef">Chapter 5</a>,
"Transient Objects," describes the properties of transient objects.
</p>
<p class="Paragraph"><a name="pgfId-7148"></a><a
href="JCRESpec06firewall.html#92454" class="XRef">Chapter 6</a>,
"Applet Isolation and Object Sharing," describes applet isolation and
object sharing.
</p>
<p class="Paragraph"><a name="pgfId-7149"></a><a
href="JCRESpec07transact.html#18113" class="XRef">Chapter 7</a>,
"Transactions and Atomicity," describes the functionality of atomicity
and transactions.
</p>
<p class="Paragraph"><a name="pgfId-7437"></a><a
href="JCRESpec08rmi.html#53672" class="XRef">Chapter 8</a>, "Remote
Method Invocation Service," describes the server-side (card-side)
functionality of the Remote Method Invocation (RMI) feature of Java
Card Platform, Version 2.2.2.
</p>
<p class="Paragraph"><a name="pgfId-7150"></a><a
href="JCRESpec09api.html#85430" class="XRef">Chapter 9</a>, "API
Topics," describes API functionality required of a Java Card RE but not
completely specified in the <em class="Emphasis">Application
Programming Interface, Java Card Platform, Version 2.2.2</em>.
</p>
<p class="Paragraph"><a name="pgfId-7151"></a><a
href="JCRESpec10vm.html#19667" class="XRef">Chapter 10</a>, "Virtual
Machine Topics," describes virtual machine resource failures and
security violations.
</p>
<p class="Paragraph"><a name="pgfId-7152"></a><a
href="JCRESpec11installer.html#17042" class="XRef">Chapter 11</a>,
"Applet Installation and Deletion," provides an overview of the Applet
Installer and Java Card RE required behavior.
</p>
<p class="Paragraph"><a name="pgfId-10727"></a><a
href="JCRESpec12constants.html#15447" class="XRef">Chapter 12</a>,
"API Constants," provides the numeric value of constants that are not
specified in the <em class="Emphasis">Application Programming
Interface, Java Card Platform, Version 2.2.2</em>.
</p>
<p class="Paragraph"><a name="pgfId-10791"></a>"<a
href="Glossary.html#48508" class="XRef">Glossary</a>," provides
definitions of selected terms used in this specification.
</p>
<h2 class="Head1P"><a name="pgfId-10738"></a>
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<hr align="left" size="6" width="15%" noshade="noshade"></div>
Related Books</h2>
<p class="Paragraph"><a name="pgfId-6094"></a>References to various
documents or products are made in this guide, Have the following
documents available:
</p>
<ul>
<li class="Bullet1"><a name="pgfId-6545"></a> <em class="Emphasis">Application
Programming Interface for the Java Card Platform, Version 2.2.2</em>.
</li>
<p class="Linebreak">
</p>
<li class="Bullet1"><a name="pgfId-6548"></a> <em class="Emphasis">Virtual
Machine Specification for the Java Card Platform, Version 2.2.2</em>.
</li>
<p class="Linebreak">
</p>
<li class="Bullet1"><a name="pgfId-6560"></a> <em class="Emphasis">The
Java</em><em class="Emphasis"></em><em class="Emphasis"> Language
Specification</em> by James Gosling, Bill Joy, and Guy L. Steele
(Addison-Wesley, 1996). </li>
<p class="Linebreak">
</p>
<li class="Bullet1"><a name="pgfId-7554"></a> <em class="Emphasis">The
Java</em><em class="Emphasis"></em><em class="Emphasis"> Virtual
Machine Specification (Java Series), Second Edition</em> by Tim
Lindholm and Frank Yellin (Addison-Wesley, 1999).
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