JOptionPane - message styles

JOptionPane has following different message styles that can be used according to the requirement:

- ERROR_MESSAGE
- INFORMATION_MESSAGE
- WARNING_MESSAGE
- QUESTION_MESSAGE
- PLAIN_MESSAGE

Code:

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JOptionPane.showMessageDialog(null, "error", "error",
  JOptionPane.ERROR_MESSAGE);
JOptionPane.showMessageDialog(null, "info", "info",
  JOptionPane.INFORMATION_MESSAGE);
JOptionPane.showMessageDialog(null, "warning", "warning",
  JOptionPane.WARNING_MESSAGE);
JOptionPane.showMessageDialog(null, "question", "question",
  JOptionPane.QUESTION_MESSAGE);
JOptionPane.showMessageDialog(null, "plain", "plain",
  JOptionPane.PLAIN_MESSAGE);

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