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

public class opgave5_while extends JFrame implements ActionListener {

      
    private JButton button;
    private JTextArea textArea;
    private JTextField textField;

    public static void main(String[] args) {
        opgave5_while demo = new opgave5_while();
        demo.setSize(300, 650);
        demo.createGUI();
        demo.show();
    }

    private void createGUI() {
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        Container window = getContentPane();
        window.setLayout(new FlowLayout());
        
        textField = new JTextField(5);
        window.add(textField);

        button = new JButton("go");
        window.add(button);
        button.addActionListener(this);

        textArea = new JTextArea(35,20);
        window.add(textArea);
        
        
    }

    public void actionPerformed(ActionEvent event) {
         
		double totaalPrijs = Double.parseDouble(textField.getText());
		int teller = 25;
		//voeg hieronder de while-lus toe			
	
		
  	
  		
        
     }
    
    
}