java - swing Jform 创建

Question

这是我的代码，问题是我找不到为什么创建一个额外的表单

        public void actionPerformed(ActionEvent ae){
           submitBtn.setForeground(Color.red);               
           //getting value form the textFields
           String name = nameTxt.getText();
           String userName = userNameTxt.getText();
           char[] pass = password.getPassword();
           Object monthValue = month.getSelectedItem();
           String yearValue = yearTxt.getText();
           String dateValue = dateTxt.getText();
           Object genderValue = gender.getSelectedItem();
           String mobileValue = mobileTxt.getText();
           Object locationValue = country.getSelectedItem();

           showDetails page = new showDetails();
           page.setVisible(true);
           JPanel contentPane = new JPanel();
           contentPane.setLayout(null);
           contentPane.setBorder(BorderFactory.createTitledBorder("user Details"));
           JLabel nameVL = new JLabel("Name             :            " + name );
           nameVL.setBounds(80, 30, 200, 200);
           contentPane.add(nameVL); 
           page.getContentPane().add(contentPane);               
        }

以上代码位于signuppage.java类

我创建一个表单来将标签结果显示到 showDetails 类

public class showDetails extends JFrame {

    Dimension screen = Toolkit.getDefaultToolkit().getScreenSize();

    public showDetails() {
        JFrame showFrame = new JFrame("user details");
        showFrame.setDefaultCloseOperation(javax.swing.JFrame.DISPOSE_ON_CLOSE);
        showFrame.setSize(300, 400);
        showFrame.setVisible(true);
        showFrame.setLocation((screen.width - 500)/2,((screen.height-350)/2));
    }
}

但我的问题是结果没有显示在 showFram 中，而不是这个表单的创建不知道如何......

Answer 1

ShowDeatils 扩展自 JFrame，而在其构造函数中，您正在创建另一个 JFrame，因此，您每次都会创建两个框架您创建 showDetails

的新实例

已更新

基本上，或者你需要做的是......

public void actionPerformed(ActionEvent ae){
        submitBtn.setForeground(Color.red);               
        //getting value form the textFields
        String name = nameTxt.getText();
        String userName = userNameTxt.getText();
        char[] pass = password.getPassword();
        Object monthValue = month.getSelectedItem();
        String yearValue = yearTxt.getText();
        String dateValue = dateTxt.getText();
        Object genderValue = gender.getSelectedItem();
        String mobileValue = mobileTxt.getText();
        Object locationValue = country.getSelectedItem();

        JFrame showFrame = new JFrame("user details");
        showFrame.setDefaultCloseOperation(javax.swing.JFrame.DISPOSE_ON_CLOSE);
        showFrame.setSize(300, 400);
        showFrame.setLocation((screen.width - 500)/2,((screen.height-350)/2));  

        JPanel contentPane = new JPanel();
        contentPane.setLayout(null);
        contentPane.setBorder(BorderFactory.createTitledBorder("user Details"));
        JLabel nameVL = new JLabel("Name             :            " + name );
        nameVL.setBounds(80, 30, 200, 200);
        contentPane.add(nameVL); 

        showFrame.getContentPane().add(contentPane);               
        showFrame.setVisible(true);
        showFrame.setVisible(true);
    }