Mine

package gui;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;

import applicationLogicAccess.ApplicationLogicAccess;

public class GUI implements WindowListener {

	public void windowActivated(WindowEvent e) {
	}

	public void windowDeactivated(WindowEvent e) {
	}

	public void windowIconified(WindowEvent e) {
	}

	public void windowDeiconified(WindowEvent e) {
	}

	public void windowOpened(WindowEvent e) {
	}

	public void windowClosed(WindowEvent e) {
	}

	public void windowClosing(WindowEvent e) {
		ApplicationLogicAccess.getInstance().exit();
		mainFrame.dispose();
	}

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		GUI gui = new GUI();
		gui.run();
	}

	private void updateList() {
		switch (filterMode) {
		case 0:
			list.setText(ApplicationLogicAccess.getInstance().getList());
			break;
		case 1:
			list.setText(ApplicationLogicAccess.getInstance()
					.getListFilteredByName(nameField.getText()));
			break;
		case 2:
			if (typeCombo.getSelectedItem().equals("Punkt"))
				list.setText(ApplicationLogicAccess.getInstance()
						.getListFilteredByType("Point"));

			if (typeCombo.getSelectedItem().equals("Dreieck"))
				list.setText(ApplicationLogicAccess.getInstance()
						.getListFilteredByType("Triangle"));

			if (typeCombo.getSelectedItem().equals("Linie"))
				list.setText(ApplicationLogicAccess.getInstance()
						.getListFilteredByType("Line"));

			if (typeCombo.getSelectedItem().equals("Kugel"))
				list.setText(ApplicationLogicAccess.getInstance()
						.getListFilteredByType("Sphere"));

			break;
		}

	}

	private int filterMode;

	private JFrame mainFrame;

	private JTextArea list;

	private JComboBox typeCombo;

	private JTextField nameField;

	public void run() {

		filterMode = 0;

		mainFrame = new JFrame("Verwaltung grafischer Objekte");
		// mainFrame.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
		mainFrame.addWindowListener(this);

		Container p = mainFrame.getContentPane();
		p.setLayout(new GridLayout(4, 2));

		list = new JTextArea();
		list.setEditable(false);
		updateList();

		JButton addButton = new JButton("Hinzufügen...");
		addButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				AddDialog dialog = new AddDialog();
				dialog.run(mainFrame);
				updateList();
			}
		});

		JButton deleteButton = new JButton("Löschen...");
		deleteButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				DeleteDialog dialog = new DeleteDialog();
				dialog.run(mainFrame);
				updateList();
			}
		});

		ButtonGroup filterGroup = new ButtonGroup();
		JRadioButton filterNoneButton = new JRadioButton("Keine Filterung",
				true);
		JRadioButton filterNameButton = new JRadioButton("Filtern nach Name",
				true);
		JRadioButton filterTypeButton = new JRadioButton("Filter nach Typ",
				true);
		filterGroup.add(filterNoneButton);
		filterGroup.add(filterNameButton);
		filterGroup.add(filterTypeButton);
		filterNoneButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				filterMode = 0;
				updateList();
			}
		});
		filterNameButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				filterMode = 1;
				updateList();

			}
		});
		filterTypeButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				filterMode = 2;
				updateList();
			}
		});

		nameField = new JTextField();
		nameField.addCaretListener(new CaretListener() {
			public void caretUpdate(CaretEvent e) {
				updateList();
			}
		});
		typeCombo = new JComboBox(new Object[] { "Dreieck", "Punkt", "Linie",
				"Kugel" });
		typeCombo.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				updateList();
			}			
		});

		p.add(addButton);
		p.add(deleteButton);
		p.add(list);
		p.add(filterNoneButton);
		p.add(filterNameButton);
		p.add(nameField);
		p.add(filterTypeButton);
		p.add(typeCombo);

		mainFrame.setSize(500, 200);
		mainFrame.setVisible(true);

	}

}