import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class Valik2 extends JPanel 
    implements ItemListener{
  JComboBox valik=new JComboBox();
  JTextField tf=new JTextField(15);
  public Valik2(){
     valik.addItem(3);
     valik.addItem(50);
     valik.addItem(90);
     setLayout(new BorderLayout());
     add(valik, BorderLayout.NORTH);
     add(tf, BorderLayout.SOUTH);
     valik.addItemListener(this);
     valik.setEditable(true);
     valik.setEditor(new ValikuRedaktor());
  }
  public void itemStateChanged(ItemEvent e){
     tf.setText(valik.getSelectedItem().toString()+" "+
        valik.getSelectedIndex());
  }
  public static void main(String[] arg){
     JFrame f=new JFrame("Rippmenüü");
     f.add(new Valik2());
     f.setSize(200, 200);
     f.setVisible(true);
  }
}