java - 如何获取列表中的连续值对？

Question

我想通过循环数组来获取连续值对:

List values = Arrays.asList("A", "B", "C");
ListIterator<String> it = values.listIterator();
while(it.hasNext()) {
      String start = it.previous();
      String end = it.next();
}

我如何获得:

A, B
B, C

Answer 1

您可以通过经典的for来实现这一点像这样循环:

public static void main(String[] args) {
    List<String> values = Arrays.asList("A", "B", "C");
    /*
     * You obviously want to output 2 values per iteration,
     * that means you have to adjust the condition to iterate to the
     * second last index (because of accessing i + 1)
     */
    for (int i = 0; i < values.size() - 1; i++) {
        System.out.println(values.get(i) + ", " + values.get(i + 1));
    }
}

不需要迭代器，我强烈建议不要仅使用 List (原始类型)但是List<String> (指定项目类型)。