Author Question: Analyze the following code:ArrayList list = new ... (Read 120 times)

jon_i · **on:** May 6, 2020

Question 1

Invoking ________ returns the number of the elements in an ArrayList x.
◦ x.getSize()
◦ x.size()
◦ x.length(1)
◦ x.getLength(0)

Question 2

Analyze the following code:

ArrayList list = new ArrayList();
list.add("Beijing");
list.add("Tokyo");
list.add("Shanghai");
list.set(3, "Hong Kong");

◦ If you replace the last line by list.add(3, "Hong Kong"), the code will compile and run fine.
◦ The last line in the code causes a runtime error because there is no element at index 3 in the array list.
◦ The last line in the code has a compile error because there is no element at index 3 in the array list.
◦ If you replace the last line by list.add(4, "Hong Kong"), the code will compile and run fine.

yeungji · **Reply #1 on:** May 6, 2020

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