DemoListSchueler

/**
  * Einfuehrung der Listbox  Siehe DemoList2
  * @version 1.0 vom 23.04.2013
  * @author Dornig
  */
import java.awt.*;       // fuer List (AWT -Komponente)
import java.awt.event.*; // fuer ActionListener
import javax.swing.*;    // fuer die einzelnen J-Komponenten
public class DemoListSchueler extends JFrame{
  // swing-Komponenten
  private JPanel pnlCp = new JPanel(null);
  private JButton btnUebernehme = new JButton("Uebernehme");
  private JButton btnCount = new JButton("Count");
  private JButton btnLoescheAlles = new JButton("Loesche Alles");
  private JButton btnLoescheEintrag = new JButton("Loesche Eintrag");
  private JButton btnZeigeEintrag = new JButton("Zeige Eintrag");
  private JTextField tfdName = new JTextField();
  private JTextField tfdItem = new JTextField();
  private JLabel lblNameTfd = new JLabel("Name");
  private JLabel lblNameLst = new JLabel("Name");
  private JLabel lblCount = new JLabel("Elemente: ");
  private JLabel lblError = new JLabel("Fehler");
  private List lstName = new List();  // Achtung: awt-Komponente
  private ButtonListener meinButtonListener = new ButtonListener();

  public DemoListSchueler(String titel) {
    super (titel);
    addWindowListener (new WindowAdapter() {
      public void windowClosing(WindowEvent evt) {
        System.exit(0);
      }
    });
    add(pnlCp);
    // Button
    btnUebernehme.setBounds(450,80,100,25);
    btnUebernehme.addActionListener(meinButtonListener);
    pnlCp.add(btnUebernehme);
    btnCount.setBounds(450,120,100,25);
    btnCount.addActionListener(meinButtonListener);
    pnlCp.add(btnCount);
    btnLoescheAlles.setBounds(450,160,140,25);
    btnLoescheAlles.addActionListener(meinButtonListener);
    pnlCp.add(btnLoescheAlles);
    btnLoescheEintrag.setBounds(450,200,140,25);
    btnLoescheEintrag.addActionListener(meinButtonListener);
    pnlCp.add(btnLoescheEintrag);
    btnZeigeEintrag.setBounds(450,320,130,25);
    btnZeigeEintrag.addActionListener(meinButtonListener);
    pnlCp.add(btnZeigeEintrag);
    // Textfeld
    tfdName.setBounds(140,80,150,25);
    pnlCp.add(tfdName);
    tfdItem.setBounds(450,350,130,25);
    pnlCp.add(tfdItem);
    // Label
    lblNameTfd.setBounds(140,60,50,25);
    pnlCp.add(lblNameTfd);
    lblNameLst.setBounds(140,140,50,25);
    lblNameLst.setFont(new Font("MS Sans Serif", Font.PLAIN, 13));
    pnlCp.add(lblNameLst);
    lblCount.setBounds(140,320,150,25);
    //lblCount.setVisible(false);
    pnlCp.add(lblCount);
    lblError.setBounds(450,240,150,25);
    lblError.setVisible(false);
    pnlCp.add(lblError);
    // Listbox
    lstName.setBounds(140,160,140,120);
    pnlCp.add(lstName);
    // JFrame
    setSize(600,450);
    setLocation(30,30);
    setResizable(false);
    setVisible(true);
  } // Ende Konstruktor
  private class ButtonListener implements ActionListener {
    public void actionPerformed(ActionEvent ae) {
      if (ae.getSource() == btnUebernehme) {

      }
      if (ae.getSource() == btnCount) {

      }
      if (ae.getSource() == btnLoescheAlles) {

      }
      if (ae.getSource() == btnLoescheEintrag) {

      }
      if (ae.getSource() == btnZeigeEintrag) {

      }
    }
  } // Ende ButtonListener
  public static void main(String[] args) {
    DemoListSchueler frmDemoList = new DemoListSchueler("Listbox");
  } // Ende main
} // Ende Klasse DemoListSchueler