Java Code:

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import java.applet.Applet;
import java.awt.Button;
import java.awt.Label;
import java.awt.TextArea;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
 
public class Mittelwert extends Applet implements ActionListener {
 
Label label;
 
TextField text1, text2, text3;
 
Button button1, button2;
 
String