In this example we are going to see how to use JCheckBoxMenuItem With ItemListener.
Java Code:
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import java.awt.event.ItemEvent; import java.awt.event.ItemListener; import java.awt.event.KeyEvent; import javax.swing.AbstractButton; import javax.swing.Icon; import javax.swing.ImageIcon; import javax.swing.JCheckBoxMenuItem; import javax.swing.JFrame; import javax.swing.JMenu; import javax.swing.JMenuBar; import javax.swing.JMenuItem; public class Main { public static void main(final String args[]) { JFrame frame = new JFrame("MenuSample Example"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JMenuBar menuBar = new JMenuBar(); // File Menu, F - Mnemonic JMenu fileMenu = new JMenu("File"); fileMenu.setMnemonic(KeyEvent.VK_F); menuBar.add(fileMenu); // File->New, N - Mnemonic JMenuItem newMenuItem = new JMenuItem("New", KeyEvent.VK_N); fileMenu.add(newMenuItem); JCheckBoxMenuItem caseMenuItem = new JCheckBoxMenuItem("Case Sensitive"); caseMenuItem.setMnemonic(KeyEvent.VK_C); fileMenu.add(caseMenuItem); ItemListener iListener = new ItemListener() { public void itemStateChanged(ItemEvent event) { Icon girlIcon = new ImageIcon("girl-r.jpg"); Icon boyIcon = new ImageIcon("boy-r.jpg"); AbstractButton aButton = (AbstractButton) event.getSource(); int state = event.getStateChange(); String newLabel; Icon newIcon; if (state == ItemEvent.SELECTED) { newLabel = "Girl"; newIcon = girlIcon; } else { newLabel = "Boy"; newIcon = boyIcon; } aButton.setText(newLabel); aButton.setIcon(newIcon); } }; caseMenuItem.addItemListener(iListener); frame.setJMenuBar(menuBar); frame.setSize(350, 250); frame.setVisible(true); } } |
Output:
