try:
Main-Class: hello.HelloWorldSwing
THUFIR HAWAT wrote:
HelloWorldSwing.jar doesn't execute with a double-click, it gives "could not find the main class. program will exit," as an error.
is this a problem with build.xml?
Microsoft Windows 2000 [Version 5.00.2195] (C) Copyright 1985-2000 Microsoft Corp.
C:\Documents and Settings\Administrator>d:
D:\>ant Buildfile: build.xml
clean: [delete] Deleting directory D:\java\classes
prepare: [mkdir] Created dir: D:\java\classes
compile: [javac] Compiling 1 source file to D:\java\classes
manifest:
package: [jar] Building jar: D:\java\classes\HelloWorldSwing.jar
BUILD SUCCESSFUL Total time: 4 seconds D:\>type build.xml <project name="HelloWorldBuild" default="package">
<property name="outputDir" value="D:\java\classes\" /> <property name="sourceDir" value="D:\java\src\atreides\hello\" /> <property name="mainClass" value="HelloWorldSwing" />
<target name="clean"> <delete dir="${outputDir}" /> </target>
<target name="prepare" depends="clean"> <mkdir dir="${outputDir}" /> </target>
<target name="compile" depends="prepare"> <javac srcdir="${sourceDir}" destdir="${outputDir}" /> </target>
<target name="manifest" depends="compile"> <manifest file="${outputDir}/MANIFEST.MF"> <attribute name="Main-Class" value="${mainClass}" /> </manifest> </target>
<target name="package" depends="manifest"> <jar jarfile="${outputDir}/${mainClass}.jar" basedir="${outputDir}" manifest="${outputDir}/MANIFEST.MF" /> </target> </project>
D:\>cd java\classes\hello
D:\java\classes\hello>dir Volume in drive D has no label. Volume Serial Number is 1CBF-03ED
Directory of D:\java\classes\hello
03/14/2005 08:21a <DIR> . 03/14/2005 08:21a <DIR> .. 03/14/2005 08:21a 349 HelloWorldSwing$1.class 03/14/2005 08:21a 897 HelloWorldSwing.class 2 File(s) 1,246 bytes 2 Dir(s) 3,585,163,264 bytes free
D:\java\classes\hello>cd ..
D:\java\classes>dir Volume in drive D has no label. Volume Serial Number is 1CBF-03ED
Directory of D:\java\classes
03/14/2005 08:21a <DIR> . 03/14/2005 08:21a <DIR> .. 03/14/2005 08:21a <DIR> hello 03/14/2005 08:21a 135 MANIFEST.MF 03/14/2005 08:21a 1,746 HelloWorldSwing.jar 2 File(s) 1,881 bytes 3 Dir(s) 3,585,163,264 bytes free
D:\java\classes>type MANIFEST.MF Manifest-Version: 1.0 Ant-Version: Apache Ant 1.6.2 Created-By: 1.5.0_02-b09 (Sun Microsystems Inc.) Main-Class: HelloWorldSwing
D:\java\classes>cd ..
D:\java>cd src\atreides\hello
D:\java\src\atreides\hello>dir Volume in drive D has no label. Volume Serial Number is 1CBF-03ED
Directory of D:\java\src\atreides\hello
03/14/2005 07:04a <DIR> . 03/14/2005 07:04a <DIR> .. 03/14/2005 07:26a 1,132 HelloWorldSwing.java 1 File(s) 1,132 bytes 2 Dir(s) 3,585,163,264 bytes free
D:\java\src\atreides\hello>type HelloWorldSwing.java package hello; import javax.swing.*;
public class HelloWorldSwing { /** * Create the GUI and show it. For thread safety, * this method should be invoked from the * event-dispatching thread. */ private static void createAndShowGUI() { //Make sure we have nice window decorations. JFrame.setDefaultLookAndFeelDecorated(true);
//Create and set up the window. JFrame frame = new JFrame("HelloWorldSwing"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Add the ubiquitous "Hello World" label. JLabel label = new JLabel("Hello World"); frame.getContentPane().add(label);
//Display the window. frame.pack(); frame.setVisible(true); }
public static void main(String[] args) { //Schedule a job for the event-dispatching thread: //creating and showing this application's GUI. javax.swing.SwingUtilities.invokeLater(new Runnable() { public void run() { createAndShowGUI(); } }); } }
D:\java\src\atreides\hello>
thanks,
Thufir
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