How to set custom editor for JSpinner?

Haven't you been vexed of using that mini text field like editor (the default editor) for JSpinner? Well, I am. So I thought of changing it and started searching for the method and hurray! I got it.

The setEditor() method. This is taking a JComponent and replacing the default editor with the given component. Fine, I got a problem here, the value in the JComponent (the custom editor) isn't updated!!

How will it update? So ridiculous, isn't it? Because we've got a custom a component set as the editor and we need to look after value changes and update the component accordingly. How could we do it then? We need to add a ChangeListener for that!

In this example, I'll set a JButton as editor and the value in the JSpinner is updated on the JButton.


import javax.swing.*;
import java.awt.*;
import javax.swing.event.*;
class JSpinnerCustomEditor extends JFrame
{
JSpinner s1;
JButton jb;

    public JSpinnerCustomEditor()
    {
        createAndShowGUI();
    }
   
    private void createAndShowGUI()
    {
        setTitle("JSpinner Example");
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setLayout(new FlowLayout());
       
        s1=new JSpinner();
       
        s1.setValue(10);
       
        jb=new JButton("Current value "+s1.getValue());
       
        s1.addChangeListener(new ChangeListener(){
            public void stateChanged(ChangeEvent ce)
            {
                jb.setText("Current value "+s1.getValue());
            }
        });
       
        // Size of jb is automatically adjusted!!
        s1.setEditor(jb);
       
        add(s1);
       
        setSize(400,400);
        setVisible(true);
    }
   
    public static void main(String args[])
    {
        new JSpinnerCustomEditor();
    }
}

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Tags: Swing Components,