Apple has finally revealed the iPhone SE in its big March 21st launch event, but what is the iPhone SE, what are its specs, how does it compare with other iPhones like the iPhone 5s and iPhone 6s, when can you buy it in the UK and how much does it cost?
Here are some examples, taken from DialogDemo.java, of using showMessageDialog, showOptionDialog, and the JOptionPane constructor. For more example code, see DialogDemo.java and the other programs listed in Examples that Use Dialogs.reates a JOptionPane with the specified buttons, icons, message, title, and so on. You must then add the option pane to a JDialog, register a property-change listener on the option pane, and show the dialog.
Once a Java class implements an Java interface you can use an instance of that class as an instance of that interface. Here is an example: Notice how the variable is declared to be of the interface type MyInterface while the object created is of type MyInterfaceImpl.efore you can really use an interface, you must implement that interface in some Java class. Here is a class that implements the MyInterface interface shown above: Notice the implements MyInterface part of the above class declaration.