JMenu Using Action Objects In Java

Chapter: Swing Last Updated: 23-07-2016 06:53:37 UTC

Program:

            /* ............... START ............... */
                
import java.awt.Component;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;

class ShowAction extends AbstractAction {
	Component parentComponent;

	public ShowAction(Component parentComponent) {
		super("About");
		putValue(Action.MNEMONIC_KEY, new Integer(KeyEvent.VK_A));
		this.parentComponent = parentComponent;
	}

	public void actionPerformed(ActionEvent actionEvent) {
		Runnable runnable = new Runnable() {
			public void run() {
				JOptionPane.showMessageDialog(parentComponent, "About Swing", "About Box V2.0",
						JOptionPane.INFORMATION_MESSAGE);
			}
		};
		EventQueue.invokeLater(runnable);
	}
}

public class JavaJMenuUsingActionObjects {

	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 ShowAction(frame));
		fileMenu.add(newMenuItem);

		frame.setJMenuBar(menuBar);
		frame.setSize(350, 250);
		frame.setVisible(true);
	}
}

                /* ............... END ............... */
        

Output


JMenu Using Action Objects In Java

Tags

JMenu Using Action Objects, Swing, Java

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