Java Programming for Complete Beginners - Java 16 - Java Tip 10 - Static Methods cannot Use Instance Methods or Variable

This video tutorial explains the rules and usage of static methods and variables in programming. It covers the creation of getters and setters for instance variables, highlighting the differences between static and instance methods. The tutorial emphasizes that static methods can only access static variables and call other static methods, while instance methods can access both static and instance variables. Key points are summarized at the end.

What is a key characteristic of a static variable?

• It can only be accessed by instance methods.

• It is always private.

• It is shared among all instances.

• It is unique to each instance.

Why can't static methods access instance variables?

• Because they are defined at the class level.

• Because they are private by default.

• Because they require a special keyword.

• Because they are only accessible within the same method.

What happens if you try to access an instance variable in a static method?

• It will compile successfully.

• It will be ignored by the compiler.

• It will result in a runtime error.

• It will cause a compilation error.

Which of the following can a static method call?

• Only instance methods

• Only static methods

• Neither instance nor static methods

• Both instance and static methods

What is the main takeaway about static methods from the video?

• They can modify instance variables directly.

• They are more flexible than instance methods.

• They can access both static and instance variables.

• They can only refer to static variables and call static methods.