Java version:1.8+ More Examples Example Use a lambda expression to sort a list in reverse alphabetical order: importjava.util.ArrayList;publicclassMain{publicstaticvoidmain(String[]args){ArrayList<String>cars=newArrayList<String>();cars.add("Volvo");cars.add("BMW");cars.add("Ford");cars.add...
1. Different Ways to Sort an ArrayList AnArrayListis an ordered and unsorted collection of elements and is part of theJava Collections framework, similar to other classes such asLinkedListorHashSet.By default, elements added in theArrayListare stored in the order they are inserted. ...
排序后的List对象可以直接使用,比如输出排序后的结果或者进行其他操作。 以上代码首先创建了一个包含整数的ArrayList,然后使用Collections.sort方法和Comparator.reverseOrder()对其进行倒序排序,并输出了排序前后的List。 希望这能帮助你理解如何在Java中对List进行倒序排序。如果你有任何进一步的问题,请随时告诉我。
import java.io.File; import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; import java.util.List; public class ShortFile { public static void main(String[] args) { List<File> fileList = new ArrayList<>(); fileList.add(new File("infoSE-201904270100.t...
importjava.util.Comparator;publicclassReverseComparatorimplementsComparator<Integer>{@Overridepublicintcompare(Integero1,Integero2){// 倒序排序returno2.compareTo(o1);}} 1. 2. 3. 4. 5. 6. 7. 8. 9. 3.3 对List进行倒序排序 importjava.util.ArrayList;importjava.util.Collections;importjava.util.List...
1.1. Sorting an ArrayList of Strings Java program to sort a list of strings lexicographically (in the dictionary order). Sorting list of strings in default order List<String>names=Arrays.asList("Alex","Charles","Brian","David");//Prints - [Alex, Brian, Charles, David]Collections.sort(name...
import java.util.Comparator; import java.util.List; void main() { List<Integer> vals = Arrays.asList(5, -4, 0, 2, -1, 4, 7, 6, 1, -1, 3, 8, -2); vals.sort(Comparator.naturalOrder()); System.out.println(vals); vals.sort(Comparator.reverseOrder()); ...
System.out.println("After removing first element of ArrayList : "+myList); System.out.println("Size of the ArrayList : "+myList.size()); Comparator comparator=Collections.reverseOrder(); Collections.sort(myList,comparator); System.out.println("After sorting ArrayList in D...
为了方便对 ArrayList 中的元素进行排序,Java 提供了 ArrayList 的 sort() 方法。 2.ArrayList 的 sort() 方法 ArrayList 的 sort() 方法用于对 ArrayList 中的元素进行排序。它可以接收一个 Comparator 参数,用于自定义排序规则。如果没有提供 Comparator 参数,sort() 方法将按照元素的自然顺序进行排序。 3.sort...
ArrayList<Employee>list=newArrayList<>();//add employees to listCollections.sort(list,Comparator.comparing(Employee::getName).thenComparing(Employee::getDob)); 2. Sorting an Array Usejava.util.Arrays.sort()method to sort a given array in a variety of ways. Thesort()is an overloaded method tha...