ArrayList programming: switchPairs Write a method switchPairs that switches the order of values in an ArrayList of Strings in a pairwise fashion. Your method should switch the order of the first two values, then switch the order of the next two, switch the order of the next two, and so on. For example, if the list initially stores these values: 4 {"four", "score", "and", "seven", "years", "ago"} your method should switch the first pair, "four", "score", the second pair, "and", "seven", and the third pair, "years", "ago", to yield this list: {"score", "four", "seven", "and", "ago", "years"} If there are an odd number of values in the list, the final element is not moved. For example, if the original list had been: {"to", "be", "or", "not", "to", "be", "hamlet"} It would again switch pairs of values, but the final value, "hamlet" would not be moved, yielding this list: {"be", "to", "not", "or", "be", "to", "hamlet"}
ArrayList programming: switchPairs Write a method switchPairs that switches the order of values in an ArrayList of Strings in a pairwise fashion. Your method should switch the order of the first two values, then switch the order of the next two, switch the order of the next two, and so on. For example, if the list initially stores these values: 4 {"four", "score", "and", "seven", "years", "ago"} your method should switch the first pair, "four", "score", the second pair, "and", "seven", and the third pair, "years", "ago", to yield this list: {"score", "four", "seven", "and", "ago", "years"} If there are an odd number of values in the list, the final element is not moved. For example, if the original list had been: {"to", "be", "or", "not", "to", "be", "hamlet"} It would again switch pairs of values, but the final value, "hamlet" would not be moved, yielding this list: {"be", "to", "not", "or", "be", "to", "hamlet"}
Database System Concepts
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ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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ArrayList programming:
switch Pairs
Write a method switchPairs that switches the order of values
in an ArrayList of Strings in a pairwise fashion. Your
method should switch the order of the first two values, then
switch the order of the next two, switch the order of the next
two, and so on. For example, if the list initially stores these
values:
h
{"four", "score", "and", "seven", "years", "ago"}
your method should switch the first pair, "four", "score",
the second pair, "and", "seven", and the third pair,
"years", "ago", to yield this list:
{"score", "four", "seven", "and", "ago", "years"}
If there are an odd number of values in the list, the final
element is not moved. For example, if the original list had
been: {"to", "be", "or", "not", "to", "be", "hamlet"}
It would again switch pairs of values, but the final value,
"hamlet" would not be moved, yielding this list: {"be",
"to", "not", "or", "be", "to", "hamlet"}
✓ Feedback"
Transcribed Image Text:Description
ArrayList programming:
switch Pairs
Write a method switchPairs that switches the order of values
in an ArrayList of Strings in a pairwise fashion. Your
method should switch the order of the first two values, then
switch the order of the next two, switch the order of the next
two, and so on. For example, if the list initially stores these
values:
h
{"four", "score", "and", "seven", "years", "ago"}
your method should switch the first pair, "four", "score",
the second pair, "and", "seven", and the third pair,
"years", "ago", to yield this list:
{"score", "four", "seven", "and", "ago", "years"}
If there are an odd number of values in the list, the final
element is not moved. For example, if the original list had
been: {"to", "be", "or", "not", "to", "be", "hamlet"}
It would again switch pairs of values, but the final value,
"hamlet" would not be moved, yielding this list: {"be",
"to", "not", "or", "be", "to", "hamlet"}
✓ Feedback
Expert Solution
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Step 1
The following are steps need to be taken for the given program:
- For the function switchPairs(), we simply loop through the length of the array list with a step size of 2.
- Inside the loop, we swap each index element with its next one.
- Return the changed arraylist at the end.
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