JSpinner arrow listener

[Mathias Nilsson]

Hi!

I need to change the value only when I press one of the arrows in a JSpinner component.
How can I add a listener to the arrow buttons. I tried ChangeListener but it was not what I needed

[Michael Dunn]

not sure I understand the question, but this will give you access to the arrow buttons

    
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
class Testing
{
  public void buildGUI()
  {
    JPanel p = new JPanel();
    JSpinner spinner = new JSpinner(new SpinnerNumberModel(50, 0, 100, 5));
    spinner.setUI(new MyUI());
    p.add(spinner);
    JFrame f = new JFrame();
    f.getContentPane().add(p);
    f.pack();
    f.setLocationRelativeTo(null);
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.setVisible(true);
  }
  public static void main(String[] args)
  {
    SwingUtilities.invokeLater(new Runnable(){
      public void run(){
        new Testing().buildGUI();
      }
    });
  }
}
class MyUI extends javax.swing.plaf.basic.BasicSpinnerUI
{
  protected Component createNextButton()
  {
    JButton btnUp = (JButton)super.createNextButton();
    btnUp.addActionListener(new ActionListener(){
      public void actionPerformed(ActionEvent ae){
        System.out.println("Going up");
      }
    });
    return btnUp;
  }
  protected Component createPreviousButton()
  {
    JButton btnDown = (JButton)super.createPreviousButton();
    btnDown.addActionListener(new ActionListener(){
      public void actionPerformed(ActionEvent ae){
        System.out.println("Going down");
      }
    });
    return btnDown;
  }
}

[Mathias Nilsson]

Thanks you very much. This was exactly what I was looking for

// Mathias