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Message Dialogs in Java (GUI)

Message dialogs contain information to the user. Message dialogs are developed with the JOptionPane.showMessageDialog() method.

To establish a message dialogue in an application.

Utilize the showMessageDialog() function belonging to the JOptionPane Class. This method requires information such as a parent component reference, desired message content and title for your dialog box.

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Furthermore you can choose one of four constants (ERROR_MESSAGE WARNING MESSAGE etc.) for your specified type of message.

Methods Used

setLayout(…) − method enables us to set the layout of the container, often a JPanel, to any layout we wish to add to it, such as Flow Layout, Border Layout, Grid Layout or null.
setBounds(…) − method is only helpful if null layout is used in JFrame and is used to set the size and placement of components like JButton.
setVisible(…) − method is used to set the visibility of JFrame

setVisible(true) // used to set JFrame visible to the users.

setVisible(false) // used to set JFrame not visible to the users.

getSource(..) − a