JMenuBar類提供了一個菜單欄的實現(xiàn)。
以下是聲明 javax.swing.JMenuBar類:
public class JMenuBar extends JComponent implements Accessible, MenuElement
S.N. | 構造函數(shù) & 描述 |
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1 |
JMenuBar() Creates a new menu bar. |
S.N. | 方法 & 描述 |
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1 |
void addNotify() Overrides JComponent.addNotify to register this menu bar with the current keyboard manager. |
1 |
AccessibleContext getAccessibleContext() Gets the AccessibleContext associated with this JMenuBar. |
2 |
Component getComponent() Implemented to be a MenuElement. |
3 |
Component getComponentAtIndex(int i) Deprecated. replaced by getComponent(int i) |
4 |
int getComponentIndex(Component c) Returns the index of the specified component. |
5 |
JMenu getHelpMenu() Gets the help menu for the menu bar. |
6 |
Insets getMargin() Returns the margin between the menubar's border and its menus. |
7 |
JMenu getMenu(int index) Returns the menu at the specified position in the menu bar. |
8 |
int getMenuCount() Returns the number of items in the menu bar. |
9 |
SingleSelectionModel getSelectionModel() Returns the model object that handles single selections. |
10 |
MenuElement[] getSubElements() Implemented to be a MenuElement -- returns the menus in this menu bar. |
11 |
MenuBarUI getUI() Returns the menubar's current UI. |
12 |
String getUIClassID() Returns the name of the L&F class that renders this component. |
13 |
boolean isBorderPainted() Returns true if the menu bars border should be painted. |
14 |
boolean isSelected() Returns true if the menu bar currently has a component selected. |
15 |
void menuSelectionChanged(boolean isIncluded) Implemented to be a MenuElement -- does nothing. |
16 |
protected void paintBorder(Graphics g) Paints the menubar's border if BorderPainted property is true. |
17 |
protected String paramString() Returns a string representation of this JMenuBar. |
18 |
protected boolean processKeyBinding(KeyStroke ks, KeyEvent e, int condition, boolean pressed) Subclassed to check all the child menus. |
19 |
void processKeyEvent(KeyEvent e, MenuElement[] path, MenuSelectionManager manager) Implemented to be a MenuElement -- does nothing. |
20 |
void processMouseEvent(MouseEvent event, MenuElement[] path, MenuSelectionManager manager) Implemented to be a MenuElement -- does nothing. |
21 |
void removeNotify() Overrides JComponent.removeNotify to unregister this menu bar with the current keyboard manager. |
22 |
void setBorderPainted(boolean b) Sets whether the border should be painted. |
23 |
void setHelpMenu(JMenu menu) Sets the help menu that appears when the user selects the "help" option in the menu bar. |
24 |
void setMargin(Insets m) Sets the margin between the menubar's border and its menus. |
25 |
void setSelected(Component sel) Sets the currently selected component, producing a a change to the selection model. |
26 |
void setSelectionModel(SingleSelectionModel model) Sets the model object to handle single selections. |
27 |
void setUI(MenuBarUI ui) Sets the L&F object that renders this component. |
28 |
void updateUI() Resets the UI property with a value from the current look and feel. |
這個類從以下類繼承的方法:
javax.swing.JComponent
java.awt.Container
java.awt.Component
java.lang.Object
選擇使用任何編輯器創(chuàng)建以下java程序在 D:/ > SWING > com > yiibai > gui >
SwingMenuDemo.javapackage com.yiibai.gui; import java.awt.*; import java.awt.event.*; public class SwingMenuDemo { private JFrame mainFrame; private JLabel headerLabel; private JLabel statusLabel; private JPanel controlPanel; public SwingMenuDemo(){ prepareGUI(); } public static void main(String[] args){ SwingMenuDemo swingMenuDemo = new SwingMenuDemo(); swingMenuDemo.showMenuDemo(); } private void prepareGUI(){ mainFrame = new JFrame("Java SWING Examples"); mainFrame.setSize(400,400); mainFrame.setLayout(new GridLayout(3, 1)); headerLabel = new JLabel("",JLabel.CENTER ); statusLabel = new JLabel("",JLabel.CENTER); statusLabel.setSize(350,100); mainFrame.addWindowListener(new WindowAdapter() { public void windowClosing(Wind