119 lines
5.7 KiB
HTML
119 lines
5.7 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="reference" />
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<meta name="DC.Title" content="Example: Using message queues (part 1 of 3)" />
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<meta name="abstract" content="" />
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<meta name="description" content="" />
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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="tutorl1" />
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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>Example: Using message queues (part 1 of 3)</title>
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</head>
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<body id="tutorl1"><a name="tutorl1"><!-- --></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">Example: Using message queues (part 1 of 3)</h1>
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<div><p></p>
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<div class="section"><p>[ <a href="tutorl2.htm#tutorl2">Next part</a> ]</p>
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<p>Use
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the following as an example for your program.</p>
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<div class="note"><span class="notetitle">Note:</span> Read the <a href="codedisclaimer.htm#codedisclaimer">Code
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example disclaimer</a> for important legal information.</div>
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<pre>//////////////////////////////////////////////////////////////////////////////////
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//
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// Example using the Message Queue function of the IBM Toolbox for Java
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//
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// This source is an example of IBM Toolbox for Java "Message Queue".
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//
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//////////////////////////////////////////////////////////////////////////////////
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package examples; <a href="#tutorl1__dup0002">Note 1</a>
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import java.io.*;
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import java.util.*;
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import com.ibm.as400.access.*; <a href="#tutorl1__dup0003">Note 2 </a>
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public class displayMessages extends Object
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{
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public static void main(String[] parameters) <a href="#tutorl1__dup0004">Note 3 </a>
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{
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displayMessages me = new displayMessages();
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me.Main(parameters); <a href="#tutorl1__dup0005">Note 4 </a>
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System.exit(0); <a href="#tutorl1__dup0006">Note 5 </a>
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}
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void displayMessage()
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{
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}
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void Main(String[] parms)
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{
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try <a href="#tutorl1__six">Note 6 </a>
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{
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// IBM Toolbox for Java code goes here
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}
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catch (Exception e)
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{
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e.printStackTrace(); <a href="#tutorl1__seven">Note 7 </a>
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}
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}
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}</pre>
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</div>
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<div class="section"><ol><li id="tutorl1__dup0002"><a name="tutorl1__dup0002"><!-- --></a>This class is in the 'examples' package. Java™ uses
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packages to avoid name conflicts between Java class files.</li>
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<li id="tutorl1__dup0003"><a name="tutorl1__dup0003"><!-- --></a>This line makes all of the IBM<sup>®</sup> Toolbox for Java classes in the access package available
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to this program. The classes in the access package have the common prefix <strong>com.ibm.as400</strong>.
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By using an import statement, the program can refer to a class using just
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its name, not its fully-qualified name. For example, you can reference the
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AS400 class by using AS400, instead of com.ibm.as400.AS400.</li>
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<li id="tutorl1__dup0004"><a name="tutorl1__dup0004"><!-- --></a>This class has a <strong>main</strong> method; therefore, it can be
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run as an application. To invoke the program, you run <strong>java examples.displayMessages</strong>.
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Note that case must match when running the program. Because an IBM Toolbox for Java class
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is used, jt400.zip must be in the classpath environment variable.</li>
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<li id="tutorl1__dup0005"><a name="tutorl1__dup0005"><!-- --></a>The main method mentioned in Note 3 is static. One of the
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restrictions of static methods is that static methods can call only other
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static methods in their class. To avoid this restriction, many java programs
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create an object, and then do initialization processing in a method called <strong>Main</strong>.
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The Main() method can call any other method in the displayMessages object.</li>
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<li id="tutorl1__dup0006"><a name="tutorl1__dup0006"><!-- --></a>The IBM Toolbox for Java creates threads on behalf of the application
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to carry out IBM Toolbox
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for Java activity.
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If the program does not issue <strong>System.exit(0)</strong> at termination time,
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the program may not terminate normally. For example, suppose this program
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was run from a Windows<sup>®</sup> 95 DOS prompt. Without this line, the command
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prompt does not return when the program finished. The user has to enter Ctrl-C
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to get a command prompt.</li>
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<li id="tutorl1__six"><a name="tutorl1__six"><!-- --></a>The IBM Toolbox for Java code throws exceptions that your program
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must catch.</li>
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<li id="tutorl1__seven"><a name="tutorl1__seven"><!-- --></a>This program displays the text of the exception while the program
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is performing error processing. Exceptions thrown by the IBM Toolbox for Java are
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translated, so the text of the exception will be the same as the language
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of the workstation.</li>
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</ol>
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<p>[ <a href="tutorl2.htm#tutorl2">Next part</a> ]</p>
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</div>
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</div>
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</body>
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</html>
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