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私は最終的に正しくコンパイルするコードを手に入れました。しかし、おそらくあります。私はのMouseListener、すべてを追加するlistbox
を設定するが、私は巨大なエラーが表示されます。AWT-EventQueue-1 on JList
私はコードに、主に、これを追加しました:listbox.addMouseListener(new MousePopupListener());
と私はそれを実行すると、それが動作します。しかし、私はJList
上で右クリックしたとき、私はこれを取得:
Row: 0
Exception in thread "AWT-EventQueue-1" java.lang.NullPointerException
at inv$MousePopupListener.checkPopup(inv.java:91)
at inv$MousePopupListener.mouseReleased(inv.java:84)
at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:273)
at java.awt.Component.processMouseEvent(Component.java:6267)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
at java.awt.Component.processEvent(Component.java:6032)
at java.awt.Container.processEvent(Container.java:2041)
at java.awt.Component.dispatchEventImpl(Component.java:4630)
at java.awt.Container.dispatchEventImpl(Container.java:2099)
at java.awt.Component.dispatchEvent(Component.java:4460)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4577)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
at java.awt.Container.dispatchEventImpl(Container.java:2085)
at java.awt.Component.dispatchEvent(Component.java:4460)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
ここに私のコードだ:
}
ありがとうございます!出来た!今私はこのエラーを取得しますが、実際には警告のようなエラーではありません*:http://imgur.com/27wI5 – nn2