showmessagedialog

JOptionPane showMessageDialog examples: I've been working with the Java JOptionPane showMessageDialog a lot lately, so I thought I'd create a page here with a number of JOptionPane showMessageDialog examples, sort of a JOptionPane reference page.

I'll walk you through some JOptionPaneexamples here, starting simple, and increasing the level of difficulty as we go on.

With custom icon

It's important to note that you can also customize the icon that is displayed when using a JOptionPane showMessageDialog. In the following example, I specify that I want to display my own PNG image by creating an ImageIcon as an additional argument to the showMessageDialog method:

Some times when exceptions occur when users are running a Java JFC/Swing application, it's nice to be able to show them a long message about what happened, i.e., something more than a one-line message. To that end I created a really simple Error Message Panel (ErrorMessagePanel.java) that you can use with the JOptionPane to display long messages.