54 lines
3.6 KiB
HTML
54 lines
3.6 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="security" content="public" />
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<meta name="Robots" content="index,follow" />
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="Native methods and the Java Native Interface" />
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<meta name="abstract" content="Native methods are Java methods that start in a language other than Java. Native methods can access system-specific functions and APIs that are not available directly in Java." />
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<meta name="description" content="Native methods are Java methods that start in a language other than Java. Native methods can access system-specific functions and APIs that are not available directly in Java." />
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<meta name="DC.Relation" scheme="URI" content="jni.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="nmjni" />
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<meta name="DC.Language" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Native methods and the Java Native Interface</title>
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</head>
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<body id="nmjni"><a name="nmjni"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Native methods and the Java Native Interface</h1>
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<div><p>Native methods are Java™ methods that start in a language other
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than Java.
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Native methods can access system-specific functions and APIs that are not
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available directly in Java.</p>
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<p>The use of native methods limits the portability of an application, because
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it involves system-specific code. Native methods can either be new native
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code statements or native code statements that call existing native code.</p>
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<p>Once you decide that a native method is required, it may have to interoperate
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with the Java virtual machine where it runs. The Java Native
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Interface (JNI) facilitates this interoperability in a platform-neutral way.</p>
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<p>The JNI is a set of interfaces that permit a native method to interoperate
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with the Java virtual machine in numerous ways. For example,
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the JNI includes interfaces that create new objects and call methods, get
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fields and set fields, process exceptions, and manipulate strings and arrays.</p>
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<p>For a complete description of the JNI, refer to the <a href="javaapi/guide/jni/index.html" target="_blank">Java Native
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Interface by Sun Microsystems, Inc.</a>, or <a href="http://www.java.sun.com/" target="_blank">The Source for Java Technology java.sun.com</a> .</p>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="jni.htm" title="You should only use native methods in cases where pure Java cannot meet your programming needs.">Use the Java Native Interface for native methods</a></div>
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</div>
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</div>
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</body>
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</html>
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