Here's what you need to know about object-oriented programming with classes, methods, objects, and interfaces, with examples in Java, Python, and TypeScript.

As you learned in my recent introduction to programming with classes and objects, you initialize an object via the code that you place in a class’s constructor. Consider Listing 7. Listing 7.

showConfirmDialog(); showMessageDialog(); and showOptionDialog(). JOptionPane import and methods. For example, the following Java class uses JOptionPane’s showInputDialog() method to prompt for user ...