How to popup a message?

In my Java-Program I want to pop up a message dialog or message box such as:

...
...
if(error)
  pop-up error message;

...
...

Is there any easy way to do that?
chenweiAsked:
Who is Participating?
 
mmuruganandamConnect With a Mentor Commented:
JOptionPane.showMessageDialog(this, "message", "Error occured", JOptionPane.WARNING_MESSAGE);

JOptionPane.showMessageDialog(this, "message", "Error occured", JOptionPane.ERROR_MESSAGE);

and so on...
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mmuruganandamCommented:
JOptionPane.showMessageDialog(this, "message", "Error occured", JOptionPane.WARNING_MESSAGE);

JOptionPane.showMessageDialog(this, "message", "Error occured", JOptionPane.ERROR_MESSAGE);

and so on....



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Mayank SAssociate Director - Product EngineeringCommented:
import javax.swing.* or javax.swing.JOptionPane for that. The parameters are: parent-frame, message, title, type-of-message.
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