Cannot resolve symbol

[Jo]

Does anyone know why I'm getting a "cannot resolve symbol method
showMessageDialog(java.lang.String)" error from this line here:

javax.swing.JOptionPane.showMessageDialog("Hello world.");

BTW It's just sitting in a normal class, not a frame.

 

[Christophe Vanfleteren]

Does anyone know why I'm getting a "cannot resolve symbol method
showMessageDialog(java.lang.String)" error from this line here:

javax.swing.JOptionPane.showMessageDialog("Hello world.");

BTW It's just sitting in a normal class, not a frame.

The compiler tells you this because there is no such method.

When you look at the API docs at
http://java.sun.com/j2se/1.4.2/docs/api/javax/swing/JOptionPane.html,
you'll see the methods that do exist.

 

[Babu Kalakrishnan]

Does anyone know why I'm getting a "cannot resolve symbol method
showMessageDialog(java.lang.String)" error from this line here:

javax.swing.JOptionPane.showMessageDialog("Hello world.");

BTW It's just sitting in a normal class, not a frame.

Did you read the API documentation for the JOptionPane class ?

You're getting the error because the JOptionPane class does not have a
showMessageDialog method with a single String argument. All the variants
of the showMessageDialog take 2 or more arguments.

BK

 

[Roedy Green]

javax.swing.JOptionPane.showMessageDialog("Hello world.");

check the JavaDoc. There is no such method. I think you wanted this
one:

showMessageDialog(Component parentComponent, Object message, String
title, int messageType)


Brings up a dialog that displays a message using a default
icon determined by the messageType parameter.