AP计算机教程7-7：简单多选题
0:00
Which index is the last element in a list called nums at?
使用
size()获得列表大小。列表索引规则和数组索引是一致的。4
Which of the following is a reason to use an array instead of an ArrayList?
ArrayList一般比数组会预留更多空间。3
Which of the following is a reason to use an ArrayList instead of an array?
列表可以按需动态调整大小。
1
Which of the following is the correct way to get the first value in a list called nums?
使用
get(index)来获取列表中索引对应元素，第一个元素的索引为0。4
Which of the following is the correct way to set the second value in a list called nums to 5?
使用
set(index,value)来替换列表中索引对应的元素，第二个元素的索引为1。4
Which of the following is the correct way to remove the value 3 from the list nums = [5, 3, 2, 1]?
使用
remove(index)来删除列表中索引对应的元素，3是第二个元素，其索引为1。3
Which of the following is the correct way to add 2 between the 1 and 3 in the following list nums = [1, 3, 4]?
使用
add(index,value)来将元素插入到列表索引对应的位置，第二个元素的索引为1。4
Which of the following is false about an interface?
不能将interface实例化，只能用class来实现它。
4
What will print when the following code executes?
List<Integer> list1 = new ArrayList<Integer>(); list1.add(new Integer(1)); list1.add(new Integer(2)); list1.add(new Integer(3)); list1.remove(1); System.out.println(list1);
删除了索引为
1的第二位元素。4
What will print when the following code executes?
List<String> list1 = new ArrayList<String>();
list1.add("Anaya");
list1.add("Layla");
list1.add("Sharrie");
list1.set(0, "Destini");
list1.add(0, "Sarah");
System.out.println(list1);
先替换第一位，再插入第一位。
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