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import java.awt.BorderLayout;
import java.util.List;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JSpinner;
import javax.swing.SpinnerListModel;
class RolloverSpinnerListModel extends SpinnerListModel {
public RolloverSpinnerListModel(List<?> values) {
super(values);
}
public RolloverSpinnerListModel(Object[] values) {
super(values);
}
public Object getNextValue() {
Object returnValue = super.getNextValue();
if (returnValue == null) {
returnValue = getList().get(0);
}
return returnValue;
}
public Object getPreviousValue() {
Object returnValue = super.getPreviousValue();
if (returnValue == null) {
List list = getList();
returnValue = list.get(list.size() - 1);
}
return returnValue;
}
}
public class RolloverSpinnerListModelSample {
public static void main(String args[]) {
JFrame frame = new JFrame("JSpinner Sample");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
String[] values = new String[]{"a","b","c"};
RolloverSpinnerListModel model = new RolloverSpinnerListModel(values);
JSpinner spinner1 = new JSpinner(model);
JPanel panel1 = new JPanel(new BorderLayout());
panel1.add(spinner1, BorderLayout.CENTER);
frame.add(panel1, BorderLayout.SOUTH);
frame.setSize(200, 90);
frame.setVisible(true);
}
}
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