package fakultaet;

import java.awt.*;
import java.awt.event.*;
import java.applet.*;

public class fakult extends Applet {
  boolean isStandalone = true;
  TextField textField1 = new TextField();
  Label label1 = new Label();
  Label label2 = new Label();
  Label label3 = new Label();
  Label label4 = new Label();
  Button button1 = new Button();
  /**Parameterwert holen*/
  public String getParameter(String key, String def) {
    return isStandalone ? System.getProperty(key, def) :
      (getParameter(key) != null ? getParameter(key) : def);
  }

  /**Das Applet konstruieren*/
  public fakult() {
  }
  /**Das Applet initialisieren*/
  public void init() {
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  /**Initialisierung der Komponenten*/
  private void jbInit() throws Exception {
    textField1.setBounds(new Rectangle(23, 67, 61, 26));
    this.setLayout(null);
    label1.setText("Fakultät berechnen Einstieg");
    label1.setBounds(new Rectangle(86, 14, 233, 17));
    label2.setText("x! = 1*2*3*...*x");
    label2.setBounds(new Rectangle(23, 34, 130, 26));
    label3.setFont(new java.awt.Font("Dialog", 1, 16));
    label3.setText("! = ");
    label3.setBounds(new Rectangle(90, 67, 32, 22));
    label4.setText("label4");
    label4.setBounds(new Rectangle(130, 63, 79, 26));
    button1.setLabel("Rechne!");
    button1.setBounds(new Rectangle(250, 64, 105, 29));
    button1.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        button1_actionPerformed(e);
      }
    });
    this.setBackground(Color.orange);
    this.add(label2, null);
    this.add(textField1, null);
    this.add(label3, null);
    this.add(label4, null);
    this.add(button1, null);
    this.add(label1, null);
  }
  /**Applet-Information holen*/
  public String getAppletInfo() {
    return "Applet-Information";
  }
  /**Parameter-Infos holen*/
  public String[][] getParameterInfo() {
    return null;
  }

  void button1_actionPerformed(ActionEvent e) {
  int x,i,erg; // x Eingabe i Laufvariable erg Ergebnis
    x = Integer.valueOf(textField1.getText()).intValue();  // Auslesen aus Feld
    erg = 1;       // erg initialisieren
    for (i=1; i<=x; i++){ // i von 1 bis n zählen
      erg = erg*i;  // bisheriges Ergebnis mit i multiplizieren
    } // - i von 1 bis n zählen
    label4.setText(Integer.toString(erg)); // Ergebnis ausgeben
  }
}