Unnamed

package Rekenmachine;
import javax.swing.*;
import java.awt.*;
/**
*
* @author Martijn
*/
public class Rekenmachine extends JFrame{
    private JTextField textvak;
    private JPanel knoppenpanel;
 
    public Rekenmachine() {
 
        knoppenpanel = new JPanel();
        textvak = new JTextField(15);
        add(textvak);
        add(knoppenpanel);
        textvak.setText("123"); // this works 
        textvak.setEnabled(false);
        setLayout(new FlowLayout());
        
        show();
    }
 
    public void setTextVak(){
        String tekst = textvak.getText();
        textvak.setText("blablabllalbalba"); // keeps showing 123
        System.out.println(textvak.getText()); // shows blablabllalbalba
        repaint();
    }
 
}



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package Rekenmachine;

public class start {
    public static void main(String[] args) {
    	(new Rekenmachine()).setTextVak();
    }
}