Complete Java SE 8 Developer Bootcamp - “this”-Part 2

The video tutorial addresses a common issue in Java programming where parameter names in methods can hide instance variables, leading to unexpected behavior. It explains the memory allocation on the stack and heap, and how method calls like 'customize' and 'get description' interact with these memory structures. The tutorial demonstrates the problem of variable hiding and offers solutions, including renaming variables or using the 'this' keyword to reference instance variables directly. The video concludes with a brief mention of using 'this' for constructor chaining.

What issue arises when parameter names in a method match instance variable names?

• The instance variables are automatically updated.

• The method runs twice.

• The instance variables are hidden by the parameters.

• The method throws a syntax error.

In the 'customize' method, what happens when the parameter 'color' is assigned a new value?

• The method throws an exception.

• The instance variable 'color' is updated.

• The object on the heap is modified.

• A new local variable 'color' is created.

What is the result of calling 'getDescription' on the car object?

• The method returns null.

• The car object is deleted.

• A new string describing the car is created.

• The car's color and type are updated.

Why does the 'getDescription' method return 'This is a red Celica'?

• The method throws an error.

• The instance variables are accessed when local variables are not found.

• The method modifies the car object.

• The local variables are used instead of instance variables.

What is one way to solve the problem of variable hiding in Java methods?

• Use different parameter names.

• Avoid using methods.

• Declare all variables as static.

• Use global variables instead.

How does the 'this' keyword help in resolving variable name conflicts?

• It creates a new instance of the object.

• It deletes the local variable.

• It refers to the local variable.

• It explicitly refers to the instance variable.

What is the preferred convention among Java developers when dealing with parameter names?

• Use completely different names for parameters.

• Use the same names and rely on the 'this' keyword.

• Avoid using parameters altogether.

• Use numbers instead of names.