ArrayList String 到 int 排序顺序

Question

我需要验证升序排序选项卡是否正常工作。 但是当我比较结果时，由于一位数和两位数，它不起作用。 如何将 ArrayList 转换为 int ？会有用吗

        ArrayList<String> obtainedList = new ArrayList<>();
    List<WebElement> elementList = driver.findElements(By.xpath("//mat-table//mat-row/mat-cell[2]"));
    for (WebElement we : elementList) {
        obtainedList.add(we.getText());
    }
    // This is where I should convert array to int ?

    ArrayList<String> sortedList = new ArrayList<>();
    for (String s : obtainedList) {
        sortedList.add(s);
    }

    Collections.reverse(sortedList);
    Collections.sort(sortedList);

    Reporter.log(AddRule + obtainedList + sortedList + " Cloumn is display in  Ascending order");
    Add_Log.info(AddRule + obtainedList + sortedList + " Cloumn is display in  Ascending order");
    List<String> labels = elementList.stream().map(WebElement::getText).collect(Collectors.toList());
    SortedSet<String> sorted = new TreeSet<>(labels);
    assertThat(labels, contains(sorted));

    Assert.assertTrue(sortedList.equals(obtainedList));

输出

编号[5, 7, 8, 10, 11, 12, 19, 22, 92, 96, 98, 99] [10, 11, 12, 19, 22, 5, 7, 8, 92, 96 , 98, 99] 列按升序显示

由于一位数和两位数，排序不工作。 如果我将字符串数组转换为 int 会起作用吗？如何修复此代码？

Answer 1

您可以从List<String> 投影到List<Integer> 通过stream#map 然后stream#sorted 对元素进行排序，然后最终收集到一个列表。

List<Integer> result = obtainedList.stream()
                                   .map(Integer::valueOf)
                                   .sorted() // sort the elements
                                   .collect(Collectors.toList());

或典型的 for 循环：

List<Integer> sortedList = new ArrayList<>();
for (String s : obtainedList) 
        sortedList.add(Integer.valueOf(s));
Collections.sort(sortedList); //sort the list after accumulating all the elements 

Answer 2

当然，如果您将obtainedList 转换为List<Integer>，它将起作用。

List<Integer> obtainedList = new ArrayList<>();

for(int i = 0; i < 10; i ++) {
    obtainedList.add(RandomUtils.nextInt(100));
}

Collections.reverse(obtainedList);
Collections.sort(obtainedList);

System.out.print(obtainedList);