Java Swing : form with text fields

Question

我正在用 java 做一个表单。

思路是:

当用户输入他的名字和第二个名字时，他必须按下“提交”按钮。现在我想通过提交按钮收听此操作，但我不知道如何获取用户在文本字段中输入的内容:“姓名”和“第二个姓名”。

我想通过提交按钮查看此数据，但我不知道是否可行。

或者我想知道当用户点击“提交”时我可以通过哪种方式看到所有这些数据。

谢谢，这是代码。

public class appNegozio extends JFrame {
     private JPanel contentPane;
     private JTextField textField;
     private JTextField textField_1;

/**
 * Launch the application.
 */
     public static void main(String[] args) {
         EventQueue.invokeLater(new Runnable() {
            public void run() {
              try {
                appNegozio frame = new appNegozio();
                frame.setVisible(true);
              } catch (Exception e) {
                e.printStackTrace();
              }
           }
        });
    }

/**
 * Create the frame.
 */
    public appNegozio() {
       setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
       setBounds(100, 100, 450, 300);
       contentPane = new JPanel();
       contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
       setContentPane(contentPane);
       SpringLayout sl_contentPane = new SpringLayout();
       contentPane.setLayout(sl_contentPane);

       textField = new JTextField();
       sl_contentPane.putConstraint(SpringLayout.NORTH, textField, 10,    
                   SpringLayout.NORTH, contentPane);
       sl_contentPane.putConstraint(SpringLayout.WEST, textField, 62, 
                   SpringLayout.WEST, contentPane);
       contentPane.add(textField);
       textField.setColumns(10);

       textField_1 = new JTextField();
       sl_contentPane.putConstraint(SpringLayout.NORTH, textField_1, 16, 
                  SpringLayout.SOUTH, textField);
       sl_contentPane.putConstraint(SpringLayout.WEST, textField_1, 0, 
                  SpringLayout.WEST, textField);
       contentPane.add(textField_1);
       textField_1.setColumns(10);

      JLabel lblNome = new JLabel("Nome");
      sl_contentPane.putConstraint(SpringLayout.NORTH, lblNome, 10,  
                  SpringLayout.NORTH, contentPane);
      sl_contentPane.putConstraint(SpringLayout.EAST, lblNome, -7, 
                  SpringLayout.WEST, textField);
      contentPane.add(lblNome);

      JLabel lblCognome = new JLabel("Cognome");
      sl_contentPane.putConstraint(SpringLayout.NORTH, lblCognome, 0, 
                  SpringLayout.NORTH, textField_1);
      sl_contentPane.putConstraint(SpringLayout.EAST, lblCognome, -6, 
                  SpringLayout.WEST, textField_1);
      contentPane.add(lblCognome);

    JButton btnSubmit = new JButton("Submit");
    sl_contentPane.putConstraint(SpringLayout.NORTH, btnSubmit, 24, 
                  SpringLayout.SOUTH, textField_1);
    sl_contentPane.putConstraint(SpringLayout.WEST, btnSubmit, 10, 
                  SpringLayout.WEST, contentPane);
    contentPane.add(btnSubmit);
   }
 }

Answer 1

一种简单的方法是为每个 JTextField 使用一个 final 局部变量。您可以从添加到 JButton 的 ActionListener 中访问它们:

final JTextField textField = new JTextField();

btnSubmit.addActionListener(new ActionListener() {

    public void actionPerformed(final ActionEvent e) {
        System.out.println(textField.getText());
    }
});