importjavax.swing.; importjava.awt.event.MouseAdapter; importjava.awt.event.MouseEvent; / 三级菜单 / publicclassJPopupMenu3{ publicstaticvoidmain(String[]args){ JFrameframe=newJFrame("SwingRight-ClickMenuExample"); JTextAreatextArea=newJTextArea("Right-clicktoshowmenu"); //创建一级菜单 JPopupMenupopupMen...