Introduction To Java Programming Chapter 2

Front 1

Which of the following identifiers are valid?

applet, Applet, a++, --a, 4#R, $4, #44, apps

Back 1

applet, Applet, $4,apps

Front 2

Which of the following are Java keywords?

class, public, int, x, y, radius

Back 2

class, public, int

Front 3

Translate the following algorithm into Java code:
Step1: Declare a double variable named miles with initial value 100;
Step2: Declare a double constant named MILE_TO_KILOMETER with value 1.609;
Step3: Declare a double variable named kilometer, multiply miles and MILE_TO_KILOMETER, and assign the result to kilometer.
Step4: Display kilometer to the console.
What is kilometer after Step4?

Back 3

Step1: double miles = 100;
Step2: final double MILE_TO_KILOMETER = 1.609;
Step3: double kilometer = MILE_TO_KILOMETER * miles;
Step4: The value of kilometer is 160.9

Front 4

What are the benefits of using constants? Declare an int constant SIZE with the value 20.

Back 4

3 benefits:
1) You don't have to repeatedly type the same value.
2) The value can be changed in a single location, if necessary
3) The program is easy to read


final int SIZE = 20;