publicclassListSortExample3{publicstaticvoidmain(String[]args){// 创建并初始化 ListList<Person>list=newArrayList<Person>(){{add(newPerson(1,30,"北京"));add(newPerson(2,20,"西安"));add(newPerson(3,40,"上海"));}};// 使用 Stream 排序list=list.stream().sorted(Comparator.comparing(Person...
importjava.util.ArrayList;importjava.util.Collections;importjava.util.Comparator;importjava.util.List;publicclassReverseSortExample{publicstaticvoidmain(String[]args){List<Integer>numbers=newArrayList<>();numbers.add(5);numbers.add(2);numbers.add(9);numbers.add(1);numbers.add(7);// 使用自定义比较...
import java.util.Comparator; import java.util.TreeSet; public class SortedListExample { public static void main(String[] args) { // 创建一个自然排序的 TreeSet TreeSet<Integer> naturalOrderSet = new TreeSet<>(); naturalOrderSet.add(5); naturalOrderSet.add(3); naturalOrderSet.add(8); Syste...
比如,对于数组arr[] = {10,4,2,8,9,20} 来说,如果从小到大排序就是{2,4,8,9,10,20},从大到小排序就是{20,10,9,8,4,2}。 对于Java来说,如果你只需要实现排序的目标,那么你只需要用下面这段代码就可以了: package 排序; import java.util.Arrays; import java.util.Comparator; public class ...
class SortedList { private Link first; public SortedList() { first = null; } public SortedList(Link[] linkArr) { first = null; for(int j=0; j current.dData) { previous = current; current = current.next; } if(previous==null
sorted.forEach(System.out::println); } enum Rank { TWO, THREE, FOUR, FIVE, SIX, SEVEN, EIGHT, NINE, TEN, JACK, QUEEN, KING, ACE, } enum Suit { CLUBS, DIAMONDS, HEARTS, SPADES } record Card(Rank rank, Suit suit) { } static class CardComparator implements Comparator<Card> { ...
3.List集合获取第一条数据使用findAny() 和 findFirst() 获取第一条数据public class ListFindAnyFindFirst { public static void main(String[] args) { //构建测试数据 List<User> list = new ArrayList<User>(); list.add(new User("张丹",11,new BigDecimal(11))); list.add(new User("刘大",13,...
@Data @NoArgsConstructor @AllArgsConstructor public class User { private int id; private int age; private String name; private BigDecimal money; } private static List<User> getList() { List<User> users = new ArrayList<>(); users.add(new User(1, 28, "张三", new BigDecimal(4000))); use...
public class ListSortExample2 { public static void main(String[] args) { // 创建并初始化 List List<Person> list = new ArrayList<Person>() {{ add(new Person(1, 30, "北京")); add(new Person(2, 20, "西安")); add(new Person(3, 40, "上海")); ...
publicclass ListSortExample {publicstaticvoid main(String[] args) {// 创建并初始化 ListList<Person> list = new ArrayList<Person>() {{add(new Person(1, 30,"北京"));add(new Person(2, 20,"西安"));add(new Person(3, 40,"上海"));}};// 使用 Comparable 自定的规则进行排序Collections....