All 4 if possible

The JComboBox class is in the java awt. event package javax. swing package java.awt package java.swing.event package To add a tool tip to a component use the addToolTipText method the setToolTipText method the toolTipText method the appendToolTipText method To add the JList object addressList to a scroll pane referenced by scrollPane, use the following addressList.add (scrollPane): addressList.addScrollPane (scrollPane): JScrollPane scrol1Pane = new JScrollPane (addressList): scrollPane. add (addresslist): To force the JFrame that encloses a window to resize itself automatically when a larger object is placed in the frame, use the resize method the grow method the pack method the enlarge method