GUI Beispiel Zähler

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Dieser Artikel gehört zum Thema Programmieren in Java.

Quelltext zum Beispiel Zähler mit GUI (liegt als Bildschirmfilm vor) - unter java/Netbeans entworfen.

Zaehler.png

Quelltext

Die Klasse Zaehler ohne GUI.

public class Zaehler {
    private int zaehler;
 
    public Zaehler() {
        zaehler = 0;
    }
 
    public int getZaehler() {
        return zaehler;
    }
 
    public void erhoeheZaehler(){
        zaehler++;
    }
}

GUI zum Zähler, benutzt die Klasse Zaehler.

/*
 * ZaehlerGUI.java
 *
 * Created on 9. Januar 2007, 09:46
 */
 
/**
 *
 * @author  ugh
 */
public class ZaehlerGUI extends javax.swing.JFrame {
 
    private Zaehler z;
 
    /** Creates new form ZaehlerGUI */
    public ZaehlerGUI() {
        initComponents();
        z = new Zaehler();
    }
 
    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    // <editor-fold defaultstate="collapsed" desc=" Generated Code ">
    private void initComponents() {
        button1 = new java.awt.Button();
        textField1 = new java.awt.TextField();
        label1 = new java.awt.Label();
 
        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        button1.setLabel("Erh\u00f6hen um 1");
        button1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                button1ActionPerformed(evt);
            }
        });
 
        textField1.setText("0");
 
        label1.setText("Ein Z\u00e4hler als Beispiel f\u00fcr den Entwurf eines GUI");
 
        org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(layout.createSequentialGroup()
                .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                    .add(layout.createSequentialGroup()
                        .add(100, 100, 100)
                        .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.TRAILING, false)
                            .add(org.jdesktop.layout.GroupLayout.LEADING, textField1, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                            .add(org.jdesktop.layout.GroupLayout.LEADING, button1, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)))
                    .add(layout.createSequentialGroup()
                        .addContainerGap()
                        .add(label1, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 270, Short.MAX_VALUE)))
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(org.jdesktop.layout.GroupLayout.TRAILING, layout.createSequentialGroup()
                .addContainerGap()
                .add(label1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED, 29, Short.MAX_VALUE)
                .add(textField1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
                .add(button1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                .add(70, 70, 70))
        );
        pack();
    }// </editor-fold>
 
    private void button1ActionPerformed(java.awt.event.ActionEvent evt) {
        z.erhoeheZaehler();
        textField1.setText(""+z.getZaehler());
    }
 
    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new ZaehlerGUI().setVisible(true);
            }
        });
    }
 
    // Variables declaration - do not modify
    private java.awt.Button button1;
    private java.awt.Label label1;
    private java.awt.TextField textField1;
    // End of variables declaration
 
}