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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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Explanation:

#include <iostream.h>

#inlcude<conion.h>

void main()

{

  int count, x;

  clrscr();

  cout<<"Enter the count:";

  cin>> count;

  cout<<"Ready!\n";

  for(x=count;x>0;x--)

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  }

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}

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Write a pseudocode method swap(aList, i, j) that interchanges the items currently in positions i and j of a list. Define the met
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Answer:

Explanation:

The following pseudocode for this method using operations of the ADT list would be the following

swap(aList, indexI, indexJ) {

    initialize temp_variable = Retrieve(indexI, aList)

    Insert(Retrieve(indexJ, aList), indexI, aList)

    Insert(Retrieve(indexI, aList), temp_variable, aList)

}

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