Learn
We can also insert new elements into an ArrayList.
To insert new elements into an ArrayList, we can use a slightly different version of the add
method that you previously used:
ArrayList<Integer> quizGrades = new ArrayList<Integer>(); quizGrades.add(95); quizGrades.add(87); quizGrades.add(73); quizGrades.add(0, 100); System.out.println( quizGrades.get(0) );
The example above will print out the grade 100
.
The add
method will insert the grade 100
at the first position (0
) into the list. Since it inserts a new element into the beginning of the ArrayList, all other element indices will be shifted one position higher. The grade 95
is now at index 1
.
Instructions
1.
Insert a new temperature of 111
at index 2
.
2.
On the next line, use the get
method to print out the temperature 89
.
Take this course for free
By signing up for Codecademy, you agree to Codecademy's Terms of Service & Privacy Policy.