This section provides a tutorial example on how to use the static methods, showInternal*Dialog(), to create and display internal dialog boxes inside an parent container.
Dialog boxes can also be created and displayed in side a panel. To do this, you need to call the "Internal" version
of show*Dialog() methods:
showInternalMessageDialog() - Method to create and display an internal message dialog box to present regular, warning or error messages.
showInternalConfirmDialog() - Method to create and display an internal confirmation dialog box with yes, no and cancel buttons.
showInternalInputDialog() - Method to create and display an internal input dialog box to prompt for some input.
showInternalOptionDialog() - Method to create and display an internal generic dialog box to present message, take a confirmation, or take some input.
Note that you can not use a JFrame object directly as the "parent" for internal dialog boxes. If you do, you will
get a runtime exception like this:
Exception in thread "AWT-EventQueue-0" java.lang.RuntimeException:
JOptionPane: parentComponent does not have a valid parent
at javax.swing.JOptionPane.createInternalFrame(
JOptionPane.java:1486)
...
The "parent" input parameter should be the content pane, or other containers.
Here is an example program I wrote to test the showInternalOptionDialog() method:
/**
* JOptionPanelInternalOptionDialog.java
* Copyright (c) 2009 by Dr. Herong Yang, http://www.herongyang.com/
*/
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
public class JOptionPanelInternalOptionDialog
implements ActionListener {
JFrame myFrame = null;
public static void main(String[] a) {
(new JOptionPanelInternalOptionDialog()).test();
}
private void test() {
myFrame = new JFrame("showInternalOptionDialog() Test");
myFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
myFrame.setSize(300,200);
Container myPane = myFrame.getContentPane();
JButton myButton = new JButton("Show");
myButton.addActionListener(this);
myPane.add(myButton);
myFrame.setVisible(true);
}
public void actionPerformed(ActionEvent e) {
int messageType = JOptionPane.QUESTION_MESSAGE;
String[] options = {"Java", "C++", "VB", "PHP", "Perl"};
int code = JOptionPane.showInternalOptionDialog(
myFrame.getContentPane(),
"What language do you prefer?",
"Option Dialog Box", 0, messageType,
null, options, "PHP");
System.out.println("Answer: "+code);
}
}
If you run this example, and click the Show button,
you will see an input dialog box showing up like this:
Sample programs listed in this section have been tested with JDK 1.6.0.
