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s344n2d4d5 [400]
3 years ago
10

Consider the following statement, which is intended to create an ArrayList named a to store only elements of type Thing. Assume

that the Thing class has been properly defined and includes a no-parameter constructor.
ArrayList a = /* missing code */;
Which of the following can be used to replace /* missing code */ so that the statement works as intended?
A: new Thing()
B: new ArrayList()
C: new ArrayList(Thing)
D: new ArrayList()
E: new ArrayList<>(Thing)
Consider the following statement, which is intended to create an ArrayList named numbers that can be used to store Integer values.
ArrayList numbers = /* missing code */;
Which of the following can be used to replace /* missing code */ so that the statement works as intended?
new ArrayList()
new ArrayList
new ArrayList()
A: III only
B: I and II only
C: I and III only
D:II and III only
E: I, II, and III
Computers and Technology
1 answer:
bogdanovich [222]3 years ago
7 0

Answer:

B: new ArrayList()

Explanation:

When dealing with Java syntax you always need to initialize an ArrayList object with its constructor. From the options listed the only correct option would be B: new ArrayList(). This would correctly initialize the ArrayList object but is not necessarily the recommended way of doing this. The truly recommended way would be the following

ArrayList<Thing> a = new ArrayList<Thing>()

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In the context of the box model, what is the difference between a margin and padding
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if you want to present slides to fellow students and co-workers which productivity software should you use to create them?
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8 0
3 years ago
2. In many jurisdictions a small deposit is added to containers to encourage people to recycle them. In one particular jurisdict
RUDIKE [14]

Answer:

Here is the Python program:

small_container = int(input("Enter the number of small containers you recycled?"))

large_container = int(input("Enter the number of large containers you recycled?"))

refund = (small_container * 0.10) + (large_container * 0.25)

print("The total refund for returning the containers is $" + "{0:.2f}".format(float(refund)))

Explanation:

The program first prompts the user to enter the number of small containers. The input value is stored in an integer type variable small_container. The input is basically an integer value.

The program then prompts the user to enter the number of large containers. The input value is stored in an integer type variable large_container. The input is basically an integer value.

refund = (small_container * 0.10) + (large_container * 0.25)  This statement computers the refund that will be recieved for returning the small and larger containers. The small containers holding one litre or less have a $0.10 deposit so the number of small containers is multiplied by 0.10. The large containers holding more than one litre have a $0.25 deposit so the number of large containers is multiplied by 0.25. Now both of these calculated deposits of containers of each side are added to return the refund that will be received for returning these containers. This whole computation is stored in refund variable.

print("The total refund for returning the containers is $" + "{0:.2f}".format(float(refund))) This print statement displays the refund in the format given in the question. The output includes a $ sign and displays exactly two decimal places by using {0:.2f} where .2f means 2 decimal places after the decimal point. Then the output is represented in floating point number using. format(float) is used to specify the output type as float to display a floating point refund value up to 2 decimal places.

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