JSpinner is a single line input field with two buttons (arrow up and arrow down) that allow us to select a value like number or object from a sequence value. It looks like a combobox without a drop-down.
In the following example we create the default JSpinner that will give us a spinner to select an integer value from it.
package org.kodejava.example.swing;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
public class JSpinnerCreate extends JFrame {
public JSpinnerCreate() {
initialize();
}
private void initialize() {
setSize(300, 300);
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
setLayout(new BorderLayout());
// Create an instance of JSpinner and put it at the top of the frame.
final JSpinner spinner = new JSpinner();
getContentPane().add(spinner, BorderLayout.NORTH);
// Create a JButton and print out the value of the JSpinner when
// the button is clicked.
JButton okButton = new JButton("OK");
okButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
Integer value = (Integer) spinner.getValue();
System.out.println("value = " + value);
}
});
getContentPane().add(okButton, BorderLayout.SOUTH);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
new JSpinnerCreate().setVisible(true);
}
});
}
}
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