How to create a Confirmation Dialog Box in Java?

To create a confirmation dialog box in Java, use the Java Swing JOptionPane.showConfirmDialog() method, which allows you to create a dialog box that asks for confirmation from the user. For example, Do you want to restart the system?, “This file contains a virus, Do you want to still download?”, etc. Kt comes with a type JOptionPane.YES_NO_CANCEL_OPTION for the same confirmation.

The following is an example to create a Confirmation Dialog Box in Java −


package my;
import java.awt.Dimension;
import javax.swing.ImageIcon;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.SwingConstants;
import javax.swing.UIManager;
public class SwingDemo {
   public static void main(String[] args) {
      ImageIcon icon = new ImageIcon("E −\
ew.PNG");       JPanel panel = new JPanel();       panel.setSize(new Dimension(250, 100));       panel.setLayout(null);       JLabel label1 = new JLabel("The file may contain virus.");       label1.setVerticalAlignment(SwingConstants.BOTTOM);       label1.setBounds(20, 20, 200, 30);       label1.setHorizontalAlignment(SwingConstants.CENTER);       panel.add(label1);       JLabel label2 = new JLabel("Do you still want to save it?");       label2.setVerticalAlignment(SwingConstants.TOP);       label2.setHorizontalAlignment(SwingConstants.CENTER);       label2.setBounds(20, 80, 200, 20);       panel.add(label2);       UIManager.put("OptionPane.minimumSize", new Dimension(400, 200));       int res = JOptionPane.showConfirmDialog(null, panel, "File",       JOptionPane.YES_NO_CANCEL_OPTION,       JOptionPane.PLAIN_MESSAGE, icon);       if(res == 0) {          System.out.println("Pressed YES");       } else if (res == 1) {          System.out.println("Pressed NO");       } else {          System.out.println("Pressed CANCEL");       }    } }


Now, let’s say we clicked on the Yes button. In that case, we have displayed the following on Console. Here, 0 is returned for YES, 1 for NO and 2 for CANCEL −

Updated on: 30-Jul-2019

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