我可以使用Java Web Start启动一个jar

Question

我正在尝试使用网络启动午餐一罐，但出现错误-

Java.lang.reflect.InvocationTargetException
    at com.sun.deploy.util.DeployAWTUtil.invokeAndWait(Unknown Source)
    at sun.plugin2.applet.Plugin2Manager.runOnEDT(Unknown Source)
    at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source)
    at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassCastException: com.simontuffs.onejar.Boot cannot be cast to java.applet.Applet
    at sun.plugin2.applet.Plugin2Manager$12.run(Unknown Source)
    at java.awt.event.InvocationEvent.dispatch(Unknown Source)
    at java.awt.EventQueue.dispatchEvent(Unknown Source)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.run(Unknown Source)
Exception: java.lang.reflect.InvocationTargetException

JNLP包含-

<?xml version="1.0" encoding="UTF-8"?>
<jnlp spec="1.0+" codebase="" href="">
    <information>
        <title>Applet Takes Params</title>
        <vendor>Protype example</vendor>
    </information>
    <resources>
        <!-- Application Resources -->
        <j2se version="1.5+"
              href="http://java.sun.com/products/autodl/j2se"/>
        <jar href="Application.jar" main="true" />
    </resources>
    <applet-desc 
         name="Application"
         main-class="com.simontuffs.onejar.Boot"
         width="800"
         height="50">
             <param name="userName" value="Ashish"/>
     </applet-desc>
     <update check="background"/>
</jnlp>

我正在尝试直接启动Application.jar ，而com.simontuffs.onejar.Boot是为JAR指定的主要类。

Answer 1

由于使用的是applet-desc标记，因此Boot类必须扩展Applet （或JApplet ）。 根据堆栈跟踪，该类似乎不会扩展任何一个。

如果不是applet，请使用application-desc而不是applet-desc