4. 使用 sorted 方法结合 Comparator 对象进行排序 现在我们已经创建了一个 Comparator 对象,接下来我们需要使用 sorted 方法来进行排序。sorted 方法会返回一个有序的 Stream。 List<String>sortedList=list.stream().sorted(comparator).collect(Collectors.toList()); 1. 在这个例子中,我们将原始 List 转换为一个...
Returns an IntStream consisting of the results of applying the given function to the elements of this stream. 返回一个 IntStream ,其中包含将给定函数应用于此流的元素的结果。(类似的还有map,mapToDouble,mapToLong) Optionalmax(Comparator<? super T> comparator) Returns the maximum element of this s...
尝试了半天后找到解决方法: 先将要排序的字段转化成int类型,然后再排序,不要用String类型去排序,不然就会乱掉。改进后的代码如下: List<MyRouteLongitudeAndLatitudeVo> collectVos = myRouteLongitudeAndLatitudeVos .stream().sorted(Comparator.comparingInt(vo -> Integer.parseInt(vo.getDeliveryOrder())).collect(...
list.stream().sorted(Comparator.comparing(类::属性一).reversed().thenComparing(类::属性二).reversed());//先以属性一升序,升序结果进行属性一降序,再进行属性二升序,结果进行属性一降序属性二降序 list.stream().sorted(Comparator.comparing(类::属性一).thenComparing(类::属性二,Comparator.reverseOrder())...
Optional<Employee> highestSalaryEmployee = getAllEmployees().stream() .filter(employee ->"上海公司".equals(employee.getSubCompany())) .collect(Collectors.maxBy(Comparator.comparingInt(Employee::getSalary))); System.out.println(highestSalaryEmployee.get()); ...
public void findHighestSalaryEmployee() {Optional<Employee> highestSalaryEmployee = getAllEmployees().stream() .filter(employee -> "上海公司".equals(employee.getSubCompany())) .collect(Collectors.maxBy(Comparator.comparingInt(Employee::getSalary))); ...
list=list.stream().sorted(Comparator.comparingInt(Person::getAge)).collect(toList()); 5. limit(long n) 返回前 n 个元素 代码语言:javascript 代码运行次数:0 运行 AI代码解释 list=list.stream().limit(2).collect(toList());打印输出[Person{name='jack',age=20},Person{name='mike',age=25}...
public void stringToIntMap() { List<String> ids = Arrays.asList("205","105","308","469","627","193","111"); // 使用流操作 List<Integer> results = ids.stream() .map(s -> Integer.valueOf(s)) .collect(Collectors.toList()); ...
public class StreamTest {public static void main(String[] args) {List<String> list = Arrays.asList("adnm", "admmt", "pot", "xbangd", "weoujgsd");Optional<String> max = list.stream().max(Comparator.comparing(String::length));System.out.println("最长的字符串：" + max.get());}}...
// can be replaced with min() Optional<Integer> min = vals.stream().collect(Collectors.minBy(Integer::compareTo)); The minBy returns a Collector that produces the minimal element according to a given Comparator. Map<Boolean, List<User>> usersByStatus = users().stream().collect(Collectors...