我想创建一个从 JMenuItem 调用的模态 JDialog。我已经阅读了一些帖子并找到了一个示例(看起来很可爱)。在此示例中,从 main 方法调用主框架。如何创建类似的东西,但在主方法中只会被称为主类的构造函数?
示例:http ://www.rsdn.ru/forum/java/3526582.1
更新:
我的代码:
import java.awt.event.*;
import javax.swing.*;
public class JD extends JFrame implements ActionListener {
private static final long serialVersionUID = 1L;
private JMenuBar menubar = new JMenuBar();
private JMenu menu = new JMenu("Options");
private JMenuItem item = new JMenuItem("Try this");
JLabel label = new JLabel("label");
JTextField text = new JTextField(10);
JPanel panel = new JPanel();
JButton b = new JButton("get and close");
JD() {
super("Frame");
setSize(200, 200);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLocationRelativeTo(null);
menu.add(item);
menubar.add(menu);
setJMenuBar(menubar);
item.addActionListener(this);
setVisible(true);
}
public void actionPerformed(ActionEvent evnt) {
Object source = evnt.getSource();
if (source == item) {
new Dialog(new JFrame());
}
}
private class Dialog extends JDialog {
private static final long serialVersionUID = 1L;
Dialog(JFrame frame) {
super(frame, true);
setSize(200, 200);
setLocationRelativeTo(null);
panel.setLayout(null);
label.setBounds(10, 10, 50, 15);
panel.add(label);
text.setBounds(60, 8, 50, 19);
panel.add(text);
add(panel);
b.setBounds(40, 40, 100, 25);
panel.add(b);
b.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evnt) {
System.out.println(text.getText());
dispose();
}
});
setVisible(true);
}
}
public static void main(String[] args) {
new JD();
}
}