Java JTable拖放

我正在尝试实现JTable拖放，我已经能够在这个问题（）中提供的解决方案的基础上使它大部分工作，并且这个问题（）根据我的需要稍微调整了一下

我遇到的问题也是，它在大多数情况下都可以正常工作，尽管使用了TableModel，比如这里的（），拖入了一个三行JTable，将第一行拖动到第二行效果很好，但将第一行拖动到第三行下方的底部会导致ArrayIndexOutOfBoundsException，该行将消失。错误发生在以下行：getDataVector（）.add（to，o）

此问题发生在以下源代码中：

Aaron似乎也回答了这个问题，为什么它可能不起作用：尽管我不确定如何在我的场景中实现Aaron的答案

Stacktrace是：

java.lang.ArrayIndexOutOfBoundsException: 2 > 1
    at java.util.Vector.insertElementAt(Vector.java:598)
    at java.util.Vector.add(Vector.java:814)
    at com.testproject.test.table.TableModel.reorder(TableModel.java:25)
    at com.testproject.test.table.TableRowTransferHandler.importData(TableRowTransferHandler.java:49)
    at javax.swing.TransferHandler$DropHandler.drop(TransferHandler.java:1544)
    at java.awt.dnd.DropTarget.drop(DropTarget.java:455)
    at javax.swing.TransferHandler$SwingDropTarget.drop(TransferHandler.java:1282)
    at sun.awt.dnd.SunDropTargetContextPeer.processDropMessage(SunDropTargetContextPeer.java:538)
    at sun.lwawt.macosx.CDropTargetContextPeer.processDropMessage(CDropTargetContextPeer.java:143)
    at sun.awt.dnd.SunDropTargetContextPeer$EventDispatcher.dispatchDropEvent(SunDropTargetContextPeer.java:852)
    at sun.awt.dnd.SunDropTargetContextPeer$EventDispatcher.dispatchEvent(SunDropTargetContextPeer.java:776)
    at sun.awt.dnd.SunDropTargetEvent.dispatch(SunDropTargetEvent.java:48)
    at java.awt.Component.dispatchEventImpl(Component.java:4746)
    at java.awt.Container.dispatchEventImpl(Container.java:2294)
    at java.awt.Component.dispatchEvent(Component.java:4713)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)
    at java.awt.LightweightDispatcher.processDropTargetEvent(Container.java:4599)
    at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4461)
    at java.awt.Container.dispatchEventImpl(Container.java:2280)
    at java.awt.Window.dispatchEventImpl(Window.java:2750)
    at java.awt.Component.dispatchEvent(Component.java:4713)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
    at java.awt.EventQueue.access$500(EventQueue.java:97)
    at java.awt.EventQueue$3.run(EventQueue.java:709)
    at java.awt.EventQueue$3.run(EventQueue.java:703)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
    at java.awt.EventQueue$4.run(EventQueue.java:731)
    at java.awt.EventQueue$4.run(EventQueue.java:729)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

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我曾试图解决这个问题，虽然我不能，什么是解决这个问题的最好方法？< /p> < p>因为你从“代码>矢量< /代码>中删除了一个元素。你应该考虑你的<代码>索引< /代码>成为<代码>索引＝1 < /代码>；

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解决方案

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检查

from

的索引是否大于

to

。如果是这样的话，我们就知道

到

的索引没有更改，如果没有更改，请通过删除索引中的一个来更改它。

你的stacktrace是什么？@YassinHajaj很抱歉没有包括它，我已经编辑了这个问题以包括它。亚伦在这里回答了一个类似但不确切的问题，关于为什么它可能不起作用，尽管我无法理解如何将亚伦的答案应用到我的重新排序方法中。如果你尝试<代码>获取< /代码>而不是<代码>删除< /代码>，然后使用<代码>删除< /代码>？考虑提供一个演示你的问题的方法。这不是一个代码转储，而是您正在做的一个示例，它突出了您所遇到的问题。这将减少混乱，提高效率responses@maldahleh我的荣幸：）

java.lang.ArrayIndexOutOfBoundsException: 2 > 1
    at java.util.Vector.insertElementAt(Vector.java:598)
    at java.util.Vector.add(Vector.java:814)
    at com.testproject.test.table.TableModel.reorder(TableModel.java:25)
    at com.testproject.test.table.TableRowTransferHandler.importData(TableRowTransferHandler.java:49)
    at javax.swing.TransferHandler$DropHandler.drop(TransferHandler.java:1544)
    at java.awt.dnd.DropTarget.drop(DropTarget.java:455)
    at javax.swing.TransferHandler$SwingDropTarget.drop(TransferHandler.java:1282)
    at sun.awt.dnd.SunDropTargetContextPeer.processDropMessage(SunDropTargetContextPeer.java:538)
    at sun.lwawt.macosx.CDropTargetContextPeer.processDropMessage(CDropTargetContextPeer.java:143)
    at sun.awt.dnd.SunDropTargetContextPeer$EventDispatcher.dispatchDropEvent(SunDropTargetContextPeer.java:852)
    at sun.awt.dnd.SunDropTargetContextPeer$EventDispatcher.dispatchEvent(SunDropTargetContextPeer.java:776)
    at sun.awt.dnd.SunDropTargetEvent.dispatch(SunDropTargetEvent.java:48)
    at java.awt.Component.dispatchEventImpl(Component.java:4746)
    at java.awt.Container.dispatchEventImpl(Container.java:2294)
    at java.awt.Component.dispatchEvent(Component.java:4713)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)
    at java.awt.LightweightDispatcher.processDropTargetEvent(Container.java:4599)
    at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4461)
    at java.awt.Container.dispatchEventImpl(Container.java:2280)
    at java.awt.Window.dispatchEventImpl(Window.java:2750)
    at java.awt.Component.dispatchEvent(Component.java:4713)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
    at java.awt.EventQueue.access$500(EventQueue.java:97)
    at java.awt.EventQueue$3.run(EventQueue.java:709)
    at java.awt.EventQueue$3.run(EventQueue.java:703)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
    at java.awt.EventQueue$4.run(EventQueue.java:731)
    at java.awt.EventQueue$4.run(EventQueue.java:729)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

public void reorder(int from, int to) {
     Object o = getDataVector().remove(from);
     getDataVector().add(from>to?to:to-1, o);
     fireTableDataChanged();
}