使用雅各布的NoSuchMethodError

Question

我曾经在我的java程序中使用雅各布来工作，但每次我尝试从ITTrackCollection获取ITTrack时都会遇到错误。

这是给出错误的那一行：

a.add(t.getItem(1));

这是错误：

Exception in thread "AWT-EventQueue-0" java.lang.NoSuchMethodError: com.jacob.com.Dispatch.call(Lcom/jacob/com/Dispatch;Ljava/lang/String;Ljava/lang/Object;)Lcom/jacob/com/Variant;
    at com.dt.iTunesController.ITTrackCollection.getItem(ITTrackCollection.java:42)
    at iq.Main.addSong(Main.java:27)
    at iq.Main$listener.onHotKey(Main.java:70)
    at com.melloware.jintellitype.JIntellitype$1.run(JIntellitype.java:396)
    at java.awt.event.InvocationEvent.dispatch(Unknown Source)
    at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
    at java.awt.EventQueue.access$000(Unknown Source)
    at java.awt.EventQueue$1.run(Unknown Source)
    at java.awt.EventQueue$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(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)
com.jacob.com.Dispatch.call(Lcom/jacob/com/Dispatch;Ljava/lang/String;Ljava/lang/Object;)Lcom/jacob/com/Variant;

A是ITTrack的数组列表，t是ITTrack集合。它肯定有两个以上的ITTracks。

谢谢

Answer 1

您的代码正在使用以下签名调用在Dispatch类中找不到的方法：

Variant call(Dispatch dispatchTarget, String name, Object attributes)

查看雅各布文档，该类中的以下方法与该方法最接近：

Variant call(Dispatch dispatchTarget, String name, Object... attributes)

注意，最后一个参数是不同的(vararg -一个对象数组)。

你是否在不同版本的库上编译你的代码？