package huiswerk3; import javax.swing.*; import java.awt.*; import java.awt.event.*; /** * * @author Martijn */ public class Rekenmachine extends JFrame{ private JPanel textpanel; private JTextField textvak; private JPanel knoppenpanel; private Knoppen knoppen; public Rekenmachine(){ knoppen = new Knoppen(); textpanel = new JPanel(); knoppenpanel = new Knoppen(); textvak = new JTextField(15); textvak.setEnabled(false); textvak.setText("0" + "aawaef"); // this works textpanel.add(textvak); textpanel.add(knoppenpanel); setContentPane(textpanel); } public void setTextVak(){ textvak.setText("0" + "aawaef"); // this doesnt work System.out.println("test"); // this works also } }