java - 单击 JButton 后创建延迟关闭 JFrame

Question

我目前正在开发数据库程序，但遇到了问题。我正在尝试创建一个 JFrame 来提示用户做什么，然后当他们单击按钮时，会调用另一个类中的方法(db.createDB() 或 db.openDB())。我不确定如何添加计时器以仅在单击其中一个按钮后处理框架。

提前致谢! 〜贾里德

这是我的代码:

import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.SwingConstants;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;

/**
 *
 * @author Jared Rathbun
 */
public class Driver {

    private Database db;
    private IDCount count;

    Driver() {
        // Initialize the DB and IDCounter.
        db = new Database();
        count = new IDCount();

        try {
            // Set the look and feel to the system default.
            UIManager.setLookAndFeel(
                    "com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
        } catch (ClassNotFoundException | IllegalAccessException
                | InstantiationException | UnsupportedLookAndFeelException e) {
            System.out.println("Look and Feel not set");
        }

        JFrame f = new JFrame("Select an Option");

        JLabel label = new JLabel("What would you like to do?");
        label.setBounds(8,10,390,50);

        JButton newDBButton = new JButton("Create a New Database");
        newDBButton.setBounds(30,75,150,45);

        JButton openDBButton = new JButton("Open a Database");
        openDBButton.setBounds(210,75,150,45);

        label.setFont(new Font("Tahoma", Font.PLAIN, 16));
        label.setHorizontalAlignment(SwingConstants.CENTER);
        label.setVerticalAlignment(SwingConstants.CENTER);

        f.add(newDBButton);
        f.add(openDBButton);
        f.add(label);

        f.setSize(400,200);
        f.setLayout(null);
        f.setResizable(false);
        f.setVisible(true);
        f.setLocationRelativeTo(null);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        // Add actionListeners for both buttons.
        newDBButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                db.createDB();
            }            
        });

        openDBButton.addActionListener(new ActionListener() {
           @Override
           public void actionPerformed(ActionEvent e) {
               db.openDB();
           }
        });    

        // NEEDS TO CLOSE A FEW SECONDS AFTER ONE OF THE BUTTONS IS CLICKED
    }

    public static void main(String[] args) {
        new Driver();
    }
}```

Answer 1

尝试在调用 dc.createDB() 和/或 db.openDB() 之后立即在每个按钮监听器内添加对 f.dispose() 的调用。这样，dc.createDB 和 db.openDB 代码将执行，并且框架 f 将立即关闭。如果您仍想等待几秒钟，请尝试在调用 f.dispose(); 之前添加行 TimeUnit.SECONDS.sleep(1);

    // Add actionListeners for both buttons.
    newDBButton.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent e) {
            db.createDB();
            f.dispose()
        }            
    });

    openDBButton.addActionListener(new ActionListener() {
       @Override
       public void actionPerformed(ActionEvent e) {
           db.openDB();
           try {
                TimeUnit.SECONDS.sleep(3);  // wait 3 seconds
           } catch (InterruptedException ex) {
                Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
           }
           f.dispose();
       }
    });

希望有帮助。

附注另外，您可能想检查是否使用 JDialog 来实现此目的，而不是 JFrame，会更好。