我想从 GUI window 获取输入并存储

Question

这是我的 GUI

在启动过程中 window 将打开并接受输入主机、端口和持续时间。
单击“连接”按钮将关闭 window。

public class Frame1 {
    
    public String userText;
    public String pwdText;
    public JFrame frame;
    public JTextField textField;
    public JTextField textField_1;
    public JTextField textField_2;
    public JLabel lblNewLabel;

    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    Frame1 window = new Frame1();
                    window.frame.setVisible(true);
                    
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the application.
     */
    public Frame1() {
        initialize();
    }

    /**
     * Initialize the contents of the frame.
     */
    public void initialize() {
        frame = new JFrame();
        frame.getContentPane().setBackground( new Color(240, 240, 240));
        frame.setBounds(100, 100, 450, 300);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.getContentPane().setLayout(null);

        JButton btnNewButton = new JButton("Connect");
        btnNewButton.setForeground(Color.BLACK);
        btnNewButton.setBackground(Color.GRAY);
        btnNewButton.setFont(new Font("Tahoma", Font.BOLD, 16));
        btnNewButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                //messape
                
                userText = textField.getText();
                pwdText = textField_1.getText();
                System.out.println(userText);
                         
                if(e.getSource()==btnNewButton) {
                       frame.dispose();
                       
                       // This exit Your GUI 
                    }
                

            }
        });

而且，这是我的主程序，我在 Connection2.

中调用 Frame1

此处在从文本字段中检索值时显示为空

public class Connection2{

    //  public static final String HOST = "localhost";
    //  public static final String PORT = "5555";

    public static String HOST;
    public static String PORT;
    public static long START;
    public static long END;

    public static void main(String[] args) throws InterruptedException, ClassNotFoundException, SQLException, IOException {


        Frame1 frame = new Frame1();
        
        Scanner sc = new Scanner(System.in);
        System.out.println("JMX CONNECTION:");
        System.out.println("HOST AND PORT");
        frame.main(args);
        
        
        HOST =frame.userText;
        PORT =frame.pwdText;
        Thread.sleep(10000);
        System.out.println(HOST);
        System.out.println(PORT);
        
        
        Thread.sleep(20000);
        System.out.println(HOST);
        System.out.println("TEST DURATION IN SECONDS");
        System.out.println("DURATON(sec): ");
        int Duration = sc.nextInt();

输出

JMX CONNECTION

HOST AND PORT
localhost
null
null

在给线程暂停时间后，我得到了这个输出。

Answer 1

在这段代码中，它不会等到用户按下按钮，所以我返回一个空值。

因此，修复此问题的一种可能方法是在连接中添加一个方法 class，当按下按钮时调用该方法

我想从 GUI window 获取输入并存储

I wanted to take input from GUI window and store

java

swing

jframe