我想在我放了关闭程序按钮的地方添加一个重置按钮，但我不知道该怎么做。我只是希望它在按下确认按钮之前将当前选项卡恢复到原始状态。
public class A5 extends JPanel {
public A5() {
super(new GridLayout(1, 1));
//creating tabbed pane
JTabbedPane tabbedPane = new JTabbedPane();
//calling question 1 tab method
JComponent q1 = makeq1panel("Question 1");
q1.setPreferredSize(new Dimension(420, 150));
tabbedPane.addTab("Question 1", q1);
add(tabbedPane);
}
private JComponent makeq1panel(String question) {
//making panel and title for it
final JPanel panel = new JPanel(false);
panel.setLayout(new GridLayout(3, 1));
JLabel title = new JLabel("Enter a number and press confirm");
title.setHorizontalAlignment(JLabel.CENTER);
panel.add(title);
//spinner for input
int spinnerstart = 1;
SpinnerModel number = new SpinnerNumberModel(spinnerstart, spinnerstart - 1, spinnerstart + 50, 1);
final JSpinner spin = addSpinner(panel,number);
//confirm button
JButton btconfirm = new JButton("Confirm");
btconfirm.addActionListener( new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
String output = null;
//checking if value is correct
int inputINT = (Integer)spin.getValue();
if (inputINT <10 && inputINT >1)
output = "True";
else output = "False";
//Question output
JLabel d2 = new JLabel("Output: " + output);
java.awt.Font subfont = new java.awt.Font("Dialog",Font.BOLD,14);
d2.setFont(subfont);
d2.setHorizontalAlignment(JLabel.CENTER);
panel.removeAll();
panel.add(d2);
//reset button
JButton btclose = new JButton("Close Program");
btclose.addActionListener( new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
System.exit(0);
}
});
//adding close button and refreshing
panel.add(btclose);
revalidate();
repaint();
}
});
panel.add(btconfirm);
return panel;
}
private static void makewindow() {
//Create and set up the window.
JFrame frame = new JFrame("Assignment 5");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Add content to the window.
frame.add(new A5(), BorderLayout.CENTER);
//Display the window.
frame.pack();
frame.setVisible(true);
}
static protected JSpinner addSpinner(Container c, SpinnerModel model) {
JSpinner spinner = new JSpinner(model);
c.add(spinner);
return spinner;
}
public static void main(String[] args) {
//run it
SwingUtilities.invokeLater(new Runnable() {
public void run() {
makewindow();
}
});
}
}