java - 刷新 JPanel 并切换 JTabbedPane 操作Perfmored

Question

 private void buttonAddJobActionPerformed(java.awt.event.ActionEvent evt) {                                             

   try {  

       retrieveID();
       String sqlStm = "INSERT INTO Job (employerID,title,description,type,salary,benefits,vacancies,closing,requirement,placement,applyTo,status,posted,location) VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?,?)"; 


       pst = conn.prepareStatement(sqlStm);
       pst.setInt(1,id);
       pst.setString(2,txtTitle.getText());
       pst.setString(3,areaDescription.getText());
       pst.setString(4,comboType.getSelectedItem().toString());
       pst.setString(5,txtSalary.getText());
       pst.setString(6,areaBenefits.getText());
       pst.setString(7,txtVac.getText());
       Date close; 
       close = txtDate.getDate();
       pst.setString(8,sdf.format(close));
       pst.setString(9,areaReq.getText());
       pst.setString(10,comboPlace.getSelectedItem().toString());
       pst.setString(11,txtWeb.getText());
       pst.setString(12,comboStatus.getSelectedItem().toString());
       Date now = new Date();   
       pst.setString(13,sdf.format(now));
       pst.setString(14,txtLoc.getText());
       pst.executeUpdate();
       JOptionPane.showMessageDialog(null,"You have successfully added a job");
       //empty all JTextfields
       //switch to another 

我正在尝试清空 JPanel 中的一组 JTextFields，但我可以刷新面板，而不是逐一清空它们吗？如果是这样，你该怎么做？我尝试了 repaint()、revalidate() 这些不起作用。也许我错了。我还想将 JTabbedPane 切换到另一个 Pane ，但是当我尝试使用此方法时，这不起作用...

JTabbedPane sourceTabbedPane = (JTabbedPane) evt.getSource();
       sourceTabbedPane.setSelectedIndex(0);

有人可以展示如何执行此操作的示例代码吗？

Answer 1

您可以循环遍历面板中包含的所有组件，如果它们是文本组件，则清除它们的值。代码会是这样的:

private void clearTextFields(Container container)
{
    int count = container.getComponentCount();
    for (int i = 0; i < count; i++)
    {
        Component component = container.getComponent(i);
        if (component instanceof Container) {
            clearTextFields((Container) component);
        }
        else if (component instanceof JTextComponent) {
            ((JTextComponent) component).setText("");
        }
    }
}

此方法以递归方式工作，并处理当您的面板包含另一个包含文本字段的面板时的情况。