Accessor Methods in Java

Eddie, a software engineer at Valve, introduces the concept of accessor methods in Java. He explains how these methods allow users to retrieve information from instance variables in a class. Using a shopping example, Eddie demonstrates how websites use accessor methods to provide information, such as the color of a shirt. He then details the process of writing and using accessor methods in Java, including creating a method signature, defining return types, and naming conventions. Finally, Eddie shows how to implement these methods in a tester class to retrieve and display object information.

What is Eddie's profession?

• Artist

• Teacher

• Software Engineer

• Doctor

What is the main purpose of software engineering according to Eddie?

• To create art

• To make users' lives easier

• To entertain people

• To solve mathematical problems

What is an accessor method used for in Java?

• To delete an instance variable

• To create a new class

• To get a value stored in an instance variable

• To set a value in an instance variable

Which keyword is used to make an accessor method accessible from outside the class?

• private

• protected

• public

• default

What is the return type of the accessor method for the 'color' instance variable?

• int

• double

• String

• boolean

What is the typical naming convention for accessor methods?

• setVariableName

• getVariableName

• accessVariableName

• retrieveVariableName

What keyword is used inside the accessor method body to return the instance variable?

• give

• yield

• return

• send

What is the name of the accessor method for the 'color' instance variable in the 'Shirt' class?

• getColor

• fetchColor

• accessColor

• retrieveColor

How do you call the accessor method to get the color of 'myRedShirt'?

• myRedShirt.color()

• myRedShirt.fetchColor()

• myRedShirt.retrieveColor()

• myRedShirt.getColor()

What will be the output when the accessor method is called for 'myBlueShirt'?

• This shirt is red

• This shirt is green

• This shirt is blue

• This shirt is yellow