import javax.swing.*; import java.awt.Dimension; import java.awt.BorderLayout; public class JSpinnerTest4 extends JFrame{ public static void main(String[] args){ JSpinnerTest4 frame = new JSpinnerTest4(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setBounds(10, 10, 300, 200); frame.setTitle("ƒ^ƒCƒgƒ‹"); frame.setVisible(true); } JSpinnerTest4(){ SpinnerListModel model = new SpinnerListModel(); JSpinner spinner = new JSpinner(model); spinner.setPreferredSize(new Dimension(100, 25)); JPanel p = new JPanel(); p.add(spinner); getContentPane().add(p, BorderLayout.CENTER); }