FINALS

• In Java, a class is a blueprint for objects, and objects are instances of classes.
• A constructor is a special method that gets called when an object is created, it is used to initialize the object.
• A no-arg constructor is a constructor that takes no arguments.
• Mutator methods are used to modify the state of an object, they are often referred to as "setters" because they set the values of instance variables.
• Accessor methods, or "getters," are used to retrieve the values of private instance variables.
• An object reference variable holds the memory address of an object, in Java, when you create an object, you're actually creating a reference to that object.
• Encapsulation in OOP is the concept of bundling data (attributes) and methods that operate on the data into a single unit (class).
• Inheritance in OOP allows a class to inherit properties and methods from another class, promoting code reuse.
• Polymorphism in Java can be achieved through method overloading and overriding.
• Abstraction in OOP simplifies complex systems by modeling classes based on real-world entities and providing essential features.
• Overloading in OOP is the concept of defining multiple methods in the same class with the same name but different parameter lists.
• Overriding in OOP is the concept of providing a specific implementation for a method in a subclass that is already defined in its superclass.
• An interface in OOP is a collection of abstract methods, and the implements keyword is used by a class to indicate that it implements a particular interface.
• Classes extending an existing class in Java can use the extends keyword.
• Swing is a GUI toolkit for Java, common GUI components include: JFrame, JPanel, JButton, JTextField, JTextArea, JLabel, JComboBox, JCheckBox, JRadioButton.
• Containers in Swing are components that can contain other components, examples include: JFrame, JPanel, JScrollPane, JTabbedPane, JDialog.