作者:伪祢添睬_362 | 来源:互联网 | 2024-11-29 10:10
在Java Swing组件中,`JCheckBoxMenuItem.setMnemonic()`方法用于设置复选框菜单项的助记符。助记符是一种快捷键,通常是一个字母或数字,用户可以通过按Alt键和对应的助记符来快速选择菜单项。这种方法可以提高用户界面的可用性和响应速度。
方法概述
`setMnemonic()`方法属于`JCheckBoxMenuItem`类,该类位于`javax.swing`包下。通过调用此方法,开发人员可以为菜单项指定一个特定的键盘快捷方式,以增强用户体验。
代码示例
示例1:创建带有助记符的日志级别菜单项
protected JCheckBoxMenuItem createMenuItem(LogLevel level) {
JCheckBoxMenuItem result = new JCheckBoxMenuItem(level.toString());
result.setSelected(true);
result.setMnemonic(level.toString().charAt(0));
result.addActionListener(e -> {
_table.getFilteredLogTableModel().refresh();
updateStatusLabel();
});
return result;
}
示例2:创建带有助记符的日志表格列菜单项
protected JCheckBoxMenuItem createLogTableColumnMenuItem(LogTableColumn column) {
JCheckBoxMenuItem result = new JCheckBoxMenuItem(column.toString());
result.setSelected(true);
result.setMnemonic(column.toString().charAt(0));
result.addActionListener(e -> {
List selectedColumns = updateView();
_table.setView(selectedColumns);
});
return result;
}
示例3:设置多语言支持的弹出菜单项
private void createPopupMenu() {
ResourceBundle msg = ResourceBundle.getBundle(MSG);
JPopupMenu popupMenu = new JPopupMenu();
String lockText = msg.getString("PopupMenu.LockToolbar.txt");
AbstractAction lockAction = new LockAction(lockText);
JCheckBoxMenuItem lockMenuItem = new JCheckBoxMenuItem(lockAction);
lockMenuItem.setMnemonic(KeyEvent.VK_L);
popupMenu.add(lockMenuItem);
popupMenu.addSeparator();
String addRemoveText = msg.getString("PopupMenu.AddRemoveButtons.txt");
JMenu addRemoveMenu = new JMenu(addRemoveText);
addRemoveMenu.setMnemonic(KeyEvent.VK_A);
populateAddRemovePopupMenu(msg);
popupMenu.add(addRemoveMenu);
}
示例4:控制游戏选项的显示
public JCheckBoxMenuItem getOptionsShowRankingCheckBoxMenuItem() {
if (optiOnsShowRankingCheckBoxMenuItem== null) {
optiOnsShowRankingCheckBoxMenuItem= new JCheckBoxMenuItem("Show current rankings");
optionsShowRankingCheckBoxMenuItem.setMnemonic('r');
optionsShowRankingCheckBoxMenuItem.setDisplayedMnemonicIndex(13);
optionsShowRankingCheckBoxMenuItem.addActionListener(eventHandler);
optionsShowRankingCheckBoxMenuItem.setEnabled(false);
}
return optionsShowRankingCheckBoxMenuItem;
}
示例5:全局声音开关菜单项
public static void addGlobalSoundSwitchMenu(JMenu parentMenu) {
JCheckBoxMenuItem soundCheckBox = new JCheckBoxMenuItem("Enable Sound");
soundCheckBox.setMnemonic(KeyEvent.VK_N);
soundCheckBox.setSelected(!ClipPlayer.getBeSilent());
soundCheckBox.addActionListener(e -> ClipPlayer.setBeSilent(!soundCheckBox.isSelected()));
parentMenu.add(soundCheckBox);
}