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4 Cards in this Set
- Front
- Back
Which of the following identifiers are valid?
applet, Applet, a++, --a, 4#R, $4, #44, apps |
applet, Applet, $4,apps
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Which of the following are Java keywords?
class, public, int, x, y, radius |
class, public, int
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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? |
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 |
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What are the benefits of using constants? Declare an int constant SIZE with the value 20.
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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; |