JMenuBar

[Rave]

Hallo,
kann mir jemand sagen warum meine JMenuBar einfach nicht angezeigt wird? Hab schon alles mögliche probiert ???:L

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.io.File;
import java.io.FileFilter;

import javax.swing.*;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;

public class PhotoApp extends JFrame implements ListSelectionListener {

	private static final long serialVersionUID = 1L;

	// Anfang Attribute
	private File[] files;

	private File directory;
	
	JMenuBar menuBar;
	JMenu menu, submenu;
	JMenuItem menuItem;
	JRadioButtonMenuItem rbMenuItem;
	JCheckBoxMenuItem cbMenuItem;
	
	private JLabel picture;
	private JScrollPane listScrollPane;
	private JScrollPane pictureScrollPane;
	private JSplitPane splitPane;
	private JList PhotoList;
	// Ende Attribute

	public PhotoApp() {

		this.directory = new File("photos/");
		if (!directory.isDirectory()) {
			System.err.println("Dies ist kein Verzeichnis: " + directory);
		}

		this.setTitle("Photo App");
		this.setDefaultCloseOperation(EXIT_ON_CLOSE);
		this.setLocationRelativeTo(null);
		this.setSize(900, 500);

		this.setLayout(new BorderLayout());
		menuBar = new JMenuBar();
		files = readDirectory();
		PhotoList = new JList(files);
		listScrollPane = new JScrollPane(PhotoList);
		pictureScrollPane = new JScrollPane();
		picture = new JLabel();
		pictureScrollPane = new JScrollPane(picture);

		Dimension minimumSize = new Dimension(100, 50);
		listScrollPane.setMinimumSize(minimumSize);
		pictureScrollPane.setMinimumSize(minimumSize);

		splitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, listScrollPane,
				pictureScrollPane);
		splitPane.setOneTouchExpandable(true);
		splitPane.setDividerLocation(200);

		menu = new JMenu("A Menu");
		menuBar.add(menu, BorderLayout.NORTH);
		
		PhotoList.setSelectedIndex(0);
		PhotoList
				.setBorder(BorderFactory.createTitledBorder("Your Pictures: "));
		PhotoList.setBackground(Color.lightGray);
		PhotoList.addListSelectionListener(this);

		JScrollPane scroll = new JScrollPane(splitPane);
		this.add(scroll, BorderLayout.CENTER);
		this.validate();
		this.setVisible(true);

		// Anfang Komponenten
		// Ende Komponenten
	}

	// Anfang Methoden

	private File[] readDirectory() {
		File[] files = directory.listFiles(new FileFilter() {
			@Override
			public boolean accept(File currentFile) {
				return currentFile.getName().toLowerCase().endsWith(".jpg");
			}
		});
		return files;
	}

	public static void main(String[] args) {
		new PhotoApp();
	}

	@Override
	public void valueChanged(ListSelectionEvent e) {
		JList list = (JList) e.getSource();
		ImageIcon icon = new ImageIcon(list.getModel()
				.getElementAt(list.getSelectedIndex()).toString());
		picture.setIcon(icon);
		picture.setHorizontalAlignment(SwingConstants.CENTER);
		picture.setVerticalAlignment(SwingConstants.CENTER);
		pictureScrollPane.updateUI();
	}
	// Ende Methoden
}

 

[eRaaaa]

Weil so etwas wie [c]this.setJMenuBar(menuBar);[/c] fehlt?
-->How to Use Menus (The Java™ Tutorials > Creating a GUI With JFC/Swing > Using Swing Components)

Btw: ein simpleres Beispiel hätte es auch getan, zu viel Code hilft meist nicht..reduziere das am Besten aufs Wichtige!

 

[Rave]

Weil so etwas wie [c]this.setJMenuBar(menuBar);[/c] fehlt?
-->How to Use Menus (The Java™ Tutorials > Creating a GUI With JFC/Swing > Using Swing Components)

Btw: ein simpleres Beispiel hätte es auch getan, zu viel Code hilft meist nicht..reduziere das am Besten aufs Wichtige!

Alles klar. Werde ich machen! Danke =)