ObjUse-WE2-P1

Section 4.4 ObjUse-WE2-P1

Subgoals for using objects (creating instances).

Declare variable of appropriate class datatype.
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Assign to variable: keyword new, followed by class name, followed by ().
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Determine whether parameter(s) are appropriate (API)
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1. Number of parameters
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2. Data types of the parameters
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Subsection 4.4.1

Exercises Exercises

1.

Q5: Click on the variables (object references) in the following code

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/* creates new random object with default seed */
Random rand = new Random();
/* creates new random object with seed parameter */
Random rand2 = new Random(1234567890);

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2.

Q6: Click on the class names (but not constructors) in the following code

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/* creates new random object with default seed */
Random rand = new Random();
/* creates new random object with seed parameter */
Random rand2 = new Random(1234567890);

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3.

Q7: Click on the calls to the Random constructor in the following code

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/* creates new random object with default seed */
Random rand = new Random();
/* creates new random object with seed parameter */
Random rand2 = new Random(1234567890);

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4.

Q8: Click on the parameters which are passed to the Random constructor in the following code

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/* creates new random object with default seed */
Random rand = new Random();
/* creates new random object with seed parameter */
Random rand2 = new Random(1234567890);

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