Constructor: Initializes objects, has the same name as the class, no return type. | Method: Performs actions, can have any name, has a return type (or void).

Public: Accessible from anywhere. | Private: Accessible only within the class.

Instance variables: Declared within a class, outside any method, accessible by all methods in the class. | Local variables: Declared within a method, accessible only within that method.

Getter: Accesses the value of an instance variable. | Setter: Modifies the value of an instance variable.

Class: A blueprint or template. | Object: An instance of a class.

Default constructor: No parameters, provides default values. | Parameterized constructor: Takes parameters, allows custom initialization.

Return type: Returns a value of the specified type. | Void: Does not return any value.

Class header: Specifies the class name and visibility. | Class body: Contains variable declarations and methods.

Creating a new object: Allocates new memory and initializes the object. | Using an existing object: Operates on an object that has already been created.

Getter method: Provides controlled access and allows additional logic. | Public instance variable: Direct access, no control or additional logic.

Classes can represent entities like accounts, customers, and transactions, each with specific attributes and behaviors.

Classes can represent game objects like players, enemies, and items, each with their own properties and actions.

Classes can represent GUI components like buttons, text fields, and windows, each with specific properties and event handlers.

Classes can represent database tables and records, each with specific fields and methods for data manipulation.

Protecting sensitive information in a user profile by making attributes private and providing controlled access through methods.

Classes can represent books, members, and librarians, each with specific attributes and behaviors related to borrowing and returning books.

Classes can represent products, customers, orders, and shopping carts, each with specific attributes and methods for managing products and processing orders.

Classes can represent users, posts, comments, and messages, each with specific attributes and methods for creating and sharing content.

Classes can represent students, courses, teachers, and grades, each with specific attributes and methods for managing student information and academic performance.

Classes can represent flights, passengers, bookings, and airports, each with specific attributes and methods for managing flight schedules and booking reservations.

1. Define the class header. 2. Declare instance variables. 3. Define constructors. 4. Define methods.

1. Declare a variable of the class type. 2. Use the new keyword followed by the class constructor to create the object. 3. Assign the newly created object to the variable.

1. Ensure the instance variable has appropriate access (e.g., public or via getter method). 2. Use the dot operator (.) to access the variable (e.g., objectName.variableName or objectName.getVariableName()).

1. Use the dot operator (.) followed by the method name and parentheses (e.g., objectName.methodName()). 2. Pass any required arguments inside the parentheses.

1. Use the public keyword. 2. Use the same name as the class. 3. Define parameters (if any) inside parentheses. 4. Write the constructor body to initialize instance variables.

1. Specify the access modifier (e.g., public, private). 2. Specify the return type (or void if no return value). 3. Give the method a name. 4. Define parameters (if any) inside parentheses. 5. Write the method body.

1. Declare instance variables as private. 2. Provide public getter methods to access the values of the instance variables. 3. Provide public setter methods to modify the values of the instance variables (if needed).

1. Create multiple constructors with the same name as the class. 2. Ensure each constructor has a different parameter list (different number or types of parameters).

1. Identify the characteristics or attributes of the class. 2. For each characteristic, determine an appropriate data type. 3. Declare the instance variables with the chosen data types.

1. Identify the actions or behaviors that objects of the class should perform. 2. Determine the inputs (parameters) required for each action. 3. Determine the output (return type) of each action. 4. Implement the methods to perform the actions.