Arrays and Array Lists - Java Concepts - page 404

Figure 4

Removing an Element from the Middle of an Array List

After each call to the add method, the size of the array list increases by 1 (see Figure
3 ).

Conversely, the call accounts.remove(i) removes the element at position i ,
moves all elements after the removed element down by one position, and reduces the
size of the array list by 1 (see Figure 4 ).

The following program demonstrates the methods of the ArrayList class. Note
that you import the generic class java.util.ArrayList , without the type
parameter.

ch07/arraylist/ArrayListTester.java

1 import java.util.ArrayList;
2
3 /**
4 This program tests the ArrayList class.
5 */
6 public class ArrayListTester
7 {
8 public static void main(String[] args)
9 {
10 ArrayList<BankAccount> accounts
11 = new ArrayList<BankAccount>();
12 accounts.add( new BankAccount( 1001 ));
13 accounts.add( new BankAccount( 1015 ));

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