📚 Topic Summary
In Java, static variables belong to the class itself rather than any specific instance of the class. This means there's only one copy of a static variable, shared by all objects of that class. Think of it like a universal setting. Similarly, static methods belong to the class and can be called without creating an object of the class. They're often used for utility functions that don't rely on the state of a particular object. Static members are accessed using the class name (e.g., `MyClass.staticVariable`).
Understanding when and how to use static variables and methods is crucial for efficient memory management and creating reusable, well-structured Java code. They enable you to define class-level attributes and behaviors, making your code cleaner and more maintainable.
🧠 Part A: Vocabulary
Match the term with its correct definition:
| Term |
Definition |
| 1. Static Variable |
A. A method that belongs to the class and can be called without creating an object. |
| 2. Static Method |
B. A special constructor that initializes a static variable only once when the class is loaded. |
| 3. Class Variable |
C. A variable that belongs to the class itself rather than to any instance of the class. |
| 4. Instance Variable |
D. A variable that belongs to a specific instance of a class (an object). Each object has its own copy. |
| 5. Static Block |
E. Another name for static variable. |
✍️ Part B: Fill in the Blanks
Complete the following paragraph using the words: class, object, static, memory, method.
A __________ variable belongs to the __________ itself, not to any particular __________. A __________ __________ can be called directly using the class name, without needing to create an __________. Using __________ variables and methods can help optimize __________ usage.
🤔 Part C: Critical Thinking
Explain a scenario where using a static variable would be more appropriate than using an instance variable. Provide a code example (pseudocode is fine) to illustrate your point.