如何实现控件上显示的托盘?

| 我有这样的屏幕:
+--------+---------------------+
|___A____|                     |
|________| JComponent I am     |
|________|  drawing on         |
|________|    __        __     |
|________|     |        |      |
|________|                     |
|________|    \\__________/     |
|________|                     |
|________|                     |
|________|                     |
+--------+---------------------+
我想这样做,以便当我单击按钮A时,我要绘制的JComponent上方弹出一个托盘?如何最好地实现这一点?通过忽略布局管理器并将其添加到我用作画布或某种分层窗格的JComponent中?
+--------+---------------------+
|___A____|_Tray__|             |
|________| JComponent I am     |
|________|  drawing on         |
|________|    __        __     |
|________|     |        |      |
|________|                     |
|________|    \\__________/     |
|________|                     |
|________|                     |
|________|                     |
+--------+---------------------+
试图区分JPopupMenu和建议的托盘。
+------+--------------------+
|Button|
+------+
|      |  <--- JPopupMenu
+------+

+------+--------------------+
|Button|____________|  <----- Tray
+------+
    
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