Question

我创建了一个在Web浏览器上运行的简单applet。我通过在命令提示符下运行“C：\ Program Files \ Java \ jdk1.6.0_21 \ bin \ jar”cfv Project7Applet.jar * .class来创建Jar文件，然后当我尝试运行jar文件时，我得到“失败”加载主类清单属性错误“但我不明白为什么会发生这种情况，因为在我创建jar文件的命令提示符中它说

added manifest
adding: Project7Applet.class.....
adding: Project7Panel.class...

这是我的.html文件

<html>
  <head>
    <title>Right Triangles</title>
  </head>

  <body>
    <h1>Right Triangles</h1>
    <!--"CONVERTED_APPLET"-->
<!-- HTML CONVERTER -->
<object
    classid = "clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
    codebase = "http://java.sun.com/update/1.6.0/jinstall-6u21-windows-i586.cab#Version=6,0,0,7"
    WIDTH = 240 HEIGHT = 175 >
    <PARAM NAME = CODE VALUE = "Project7Applet.class" >
    <PARAM NAME = ARCHIVE VALUE = "Project7Applet.jar" >
    <param name = "type" value = "application/x-java-applet;version=1.6">
    <param name = "scriptable" value = "false">

    <comment>
 <embed
            type = "application/x-java-applet;version=1.6" \
            CODE = "Project7Applet.class" \
            ARCHIVE = "Project7Applet.jar" \
            WIDTH = 200 \
            HEIGHT = 125
     scriptable = false
     pluginspage = "http://java.sun.com/products/plugin/index.html#download">
     <noembed>
            <p>This applet requires version 1.5 or later of Java.</p>
            </noembed>
 </embed>
    </comment>
</object>

<!--
<APPLET CODE = "Project7Applet.class" ARCHIVE = "Project7Applet.jar" WIDTH = 240 HEIGHT = 175>
<p>This applet requires version 1.5 or later of Java.</p>

</APPLET>
-->
<!--"END_CONVERTED_APPLET"-->

  </body>
</html>

Answer 1

我假设当您双击运行jar时出现错误：

java -jar yourjar

然后你应该有一个manifest.mf文件，其中包含以下内容：

Main-Class: MyPackage.MyClass

Main-Class之后有一个CRLF。

然后创建你的jar

jar cfm MyJar.jar manifest.mf MyPackage/*.class

现在你有一个可执行的jar。

如果您在浏览器中遇到主要类清单错误，请发表评论。

无法加载主类清单属性

1 个答案: