Java：等待用户在旋转窗口上输入

Java：等待用户在旋转窗口上输入

您可以使用模式对话框来获取用户输入，该对话框将在可见时阻止代码执行，并在不可见时继续执行代码（这是不可思议的），有关更多信息，请参见如何制作对话框。

更新

模态对话框将仅阻止“事件调度线程”（从技术上讲不会阻止它，只是绕过它），有关更多详细信息，请参见初始线程。

import java.awt.BorderLayout;import java.awt.Color;import java.awt.EventQueue;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.util.Arrays;import javax.swing.JButton;import javax.swing.JDialog;import javax.swing.Jframe;import javax.swing.JLabel;import javax.swing.JPanel;import javax.swing.JPasswordField;import javax.swing.JTextField;import javax.swing.UIManager;import javax.swing.UnsupportedLookAndFeelException;import net.miginfocom.swing.MigLayout;public class MainClass {    private char[] password;    private String pin;    public static void main(String[] args) {        EventQueue.invokeLater(new Runnable() { @Override public void run() {     try {         UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());     } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {         ex.printStackTrace();     }     System.out.println("Before Window");     Window w = new Window();     System.out.println("After Window");     System.out.println(w.getPin() + Arrays.toString(w.getPassword()) + '1'); }        });    }    public static class Window extends JDialog {        private JTextField textField_1;        private JButton btnNewButton;        private JPanel panel;        private JPasswordField passwordField;        private char[] password = new char[10];        private String pin;        public Window() { this.setModal(true); this.setDefaultCloseOperation(Jframe.DISPOSE_ON_CLOSE); this.setLocationRelativeTo(null); this.setSize(370, 150); this.setForeground(new Color(192, 192, 192)); this.setTitle("Access Password Manager"); this.setResizable(false); panel = new JPanel(); getContentPane().add(panel, BorderLayout.CENTER); panel.setLayout(new MigLayout("", "[70.00][132.00,grow][44.00][67.00,grow][61.00][]", "[19.00][34.00][]")); JLabel lblNewLabel = new JLabel("Password"); panel.add(lblNewLabel, "cell 0 1,alignx trailing,aligny center"); passwordField = new JPasswordField(); passwordField.setColumns(13); panel.add(passwordField, "cell 1 1,alignx center"); JLabel lblNewLabel_1 = new JLabel("Key"); panel.add(lblNewLabel_1, "cell 2 1,alignx center,aligny center"); textField_1 = new JTextField(); panel.add(textField_1, "cell 3 1,alignx left,aligny center"); textField_1.setColumns(4); btnNewButton = new JButton("Log In"); ListenForButton listener = new ListenForButton(); btnNewButton.addActionListener(listener); panel.add(btnNewButton, "cell 4 1"); this.setVisible(true);        }        private class ListenForButton implements ActionListener { @Override public void actionPerformed(ActionEvent e) {     if (e.getSource() == btnNewButton) {         if (passwordField.getPassword().length < 10) {  password = passwordField.getPassword().clone();         }         pin = textField_1.getText();     } }        }        public char[] getPassword() { return password;        }        public String getPin() { return pin;        }    }}