Swing结构 TExt Object COmbo box Component JLabel Container JList JMenu bar Window J Component JOptionpane JPanel Frame Dialog Y JScrollBar I JFrame JDialog AbstractButton TOggle button JMenultemJButton CheckBox JRadioButton JMenu 北大青鸟8 Swing 结构 Object Component JFrame Container Window Frame Dialog JDialog JText JComboBox JLabel JList JMenuBar JOptionPane JPanel JScrollBar AbstractButton JToggleButton JMenuItem JButton JCheckBox JRadioButton JComponent JMenu