Display error message dialog with JOptionPane.ERROR_MESSAGE : OptionPane « Swing JFC « Java

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Java » Swing JFC » OptionPane Screenshots  Display error message dialog with JOptionPane.ERROR_MESSAGE    import javax.swing.JOptionPane; import javax.swing.JPanel; public class JOptionPaneERROR_MESSAGE {   public static void main(String[] args) {     final JPanel panel = new JPanel();     JOptionPane.showMessageDialog(panel, "Could not open file", "Error", JOptionPane.ERROR_MESSAGE);   } }             Related examples in the same category 1.  A Program that Uses the JOptionPane Class to Get User Input 2.  Demonstrates JoptionPane 3.  OptionPane Sample: simple dialog 4.  JOptionPane demo 5.  JOptionPane utilities 6.  Simple Input Dialog 7.  Demonstrate JOptionPane 8.  Display warning message dialog with JOptionPane.WARNING_MESSAGE 9.  Display question message dialog with JOptionPane.QUESTION_MESSAGE 10.  Display information message dialog with JOptionPane.INFORMATION_MESSAGE 11.  Show a message dialog with JOptionPane 12.  Create a message dialog box with different options 13.  Show message in two lines in a dialog box 14.  Modal dialog with yes/no button 15.  Modal dialog with OK/cancel and a text field 16.  Wait (forever) for a non-null click and then quit 17.  Create a Confirm Dialog Box 18.  Create a Message Dialog Box 19.  Use a JOptionPane 20.  Yes no cancel dialog 21.  OK cancel option dialog 22.  Dialog with default options 23.  Localize a JOptionPane dialog 24.  Customize JOptionPane buttons 25.  Exercise Options 26.  Modifiable JOptionPane 27.  Message dialog helper