All Flashcards
What is the significance of the void keyword in a method header?
It indicates that the method does not return a value.
How do you call a static method?
Use the class name and dot notation: ClassName.methodName();
How do you call a non-static method?
Use the object name and dot notation: objectName.methodName();
Why is the method signature important?
It's crucial for the compiler to identify and call the correct method.
What happens when a method is called?
The program jumps to the method's code, executes it, and returns to the point where it was called.
What are methods essential for?
Organizing code into reusable blocks and making programs more modular.
What is the role of parameters in methods?
They allow methods to accept input values, modifying their behavior.
What does a method signature consist of?
The method name and the parameter list.
What is the purpose of static methods?
They belong to the class and act as general tools for any object of the class.
What is the purpose of non-static methods?
They operate on a specific object, with each object having its own version.
What are the differences between void and non-void methods?
Void: Performs actions, no return value. Non-void: Performs actions, returns a value.
What are the differences between static and non-static methods?
Static: Belongs to the class, called using class name. Non-static: Belongs to the object, called using object name.
Compare calling static vs. non-static methods.
Static: ClassName.methodName(). Non-static: objectName.methodName(). Static methods don't require an object instance.
What are the differences between parameters and arguments?
Parameters: Variables in method definition. Arguments: Actual values passed when calling the method.
Compare public, private, and protected access modifiers.
Public: Accessible from anywhere. Private: Accessible only within the class. Protected: Accessible within the class, subclass, and package.
Compare System.out.print() and System.out.println().
print(): Prints to the console without a newline. println(): Prints to the console with a newline.
Compare if and switch statements.
if: Evaluates boolean expressions. switch: Evaluates a single variable against multiple constant values.
Compare for and while loops.
for: Used when the number of iterations is known. while: Used when the number of iterations is unknown.
Compare classes and objects.
Classes: Blueprint for creating objects. Objects: Instances of a class.
Compare local and instance variables.
Local: Declared inside a method, scope limited to that method. Instance: Declared inside a class but outside any method, belongs to an object.
How are methods used in real-world software development?
To break down complex tasks into smaller, manageable, and reusable components, improving code organization and maintainability.
Give an example of how static methods are used.
Utility functions like Math.random() or helper methods in a class that don't depend on object state.
How are void methods used in GUI applications?
To handle events like button clicks or menu selections, performing actions without returning a value.
How are non-void methods used in data processing?
To perform calculations or transformations on data and return the result, such as calculating the average of a list of numbers.
How are methods used in game development?
To define the actions and behaviors of game objects, such as moving a character or firing a weapon.
How are methods used in web development?
To handle user input, process data, and generate dynamic content on web pages.
How are methods used in mobile app development?
To implement the functionality of app features, such as displaying data, handling user interactions, and managing device resources.
How are methods used in database management?
To perform operations on database records, such as inserting, updating, deleting, and querying data.
How are methods used in scientific computing?
To implement mathematical algorithms and simulations, such as solving equations or modeling physical phenomena.
How are methods used in machine learning?
To implement machine learning algorithms, such as training models, making predictions, and evaluating performance.