Error in the programme

Question

Could you please tell me what is the error in below programme? I tried to compile this without importing javax.swing.JOptionPane.
/** This application programme displays Welcome to Java!
* in a message dialog box.
//import javax.swing.JOptionPane;
public class WelcomeInMessageDialogBox {
     public static void main(String[] args) {
          // Display Welcome to Java! in a message dialog box
          javax.swing.JOptionPane.showMessageDialogBox(null,"Welcome to Java!","Example 1.2 Output",OptionPane.INFORMATION_MESSAGE);
}

Answer 1

thanks for the reply, I tried this way too, but it gives errors
//import javax.swing.JOptionPane;
public class WelcomeInMessageDialogBox {
     public static void main(String[] args) {
          // Display Welcome to Java! in a message dialog box
          javax.swing.JOptionPane.showMessageDialog(null,"Welcome to Java!","Example 1.2 Output",JOptionPane.INFORMATION_MESSAGE);
WelcomeInMessageDialogBox.java:12: cannot find symbol
symbol : variable JOptionPane
location: class WelcomeInMessageDialogBox
javax.swing.JOptionPane.showMessageDialog(null,"Welcome to Java!","Example 1.2 Output",JOptionPane.INFORMATION_MESSAGE);