Show Message and Confirm Dialog Box - Swing Dialogs
This section show you how to display several types of
message box. There are three types of message dialog box that you can use in
your swing applications, example of each type of dialog boxes are provided here.
When your run the program, it will display a frame with three buttons. Once you click
on the first button then the simple message box will open which holds only
"Ok" button as shown below:
If you click on the second button then the confirm
dialog box will open which asks for "Ok" and "Cancel".
If
you click on the "Ok" button then a message dialog box will open with
message "You clicked on "Ok" button" like this
otherwise message
dialog box will open with text "You clicked on "Cancel" button
like this
If you click on the third button from the main window
or frame then a confirm message dialog box will open with three button i.e. the
"Yes", "No" and "Cancel" like the following image:
For this purposes two methods have been used:
- showMessageDialog():
Above method shows a simple message dialog box which holds only one button
i.e. "Ok" button. This method takes four arguments in which, first
is the parent object name, second is the message as string, third is the title of the message dialog box as
string and the last is the type of the message dialog box.
- showConfirmDialog():
Above method asks from the user by displaying a message dialog box which
contains more than one button. Depending on the parameter passed it can be
"Ok" and
"Cancel" or "Yes", "No" and
"Cancel". This method returns the integer value.
Here is the code of the program:
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class ShowMessageDialog{
JButton button;
public static void main(String[] args){
ShowMessageDialog md = new ShowMessageDialog();
}
public ShowMessageDialog(){
JFrame frame = new JFrame("Message Dialog Box");
button = new JButton("Show simple message dialog box");
button.addActionListener(new MyAction());
JPanel panel = new JPanel();
panel.add(button);
button = new JButton("Show \"Ok/Cancel\" message
dialog box");
button.addActionListener(new MyAction());
panel.add(button);
button = new JButton("Show \"Yes/No/Cancel\" dialog box");
button.addActionListener(new MyAction());
panel.add(button);
frame.add(panel);
frame.setSize(400, 400);
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public class MyAction implements ActionListener{
public void actionPerformed(ActionEvent ae){
String str = ae.getActionCommand();
if(str.equals("Show simple message dialog box")){
JOptionPane.showMessageDialog(null, "This is the simple message
dialog box.", "Roseindia.net", 1);
}
else if(str.equals("Show \"Ok/Cancel\" message dialog box")){
if(JOptionPane.showConfirmDialog(null, "This is the \"Ok/Cancel\"
message dialog box.", "Roseindia.net", JOptionPane.OK_CANCEL_OPTION) == 0)
JOptionPane.showMessageDialog(null, "You clicked on \"Ok\" button",
"Roseindia.net", 1);
else
JOptionPane.showMessageDialog(null, "You clicked on \"Cancel\" button",
"Roseindia.net", 1);
}
else if(str.equals("Show \"Yes/No/Cancel\" dialog box")){
JOptionPane.showConfirmDialog(null, "This is the \"Yes/No/Cancel\"
message dialog box.");
}
}
}
}
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