arrayList.sort(Comparator.reverseOrder()); The program output: Similarily, we can apply custom sorting using the custom comparator also. arrayList.sort(Comparator.comparing(Task::name)); The program output prints the tasks in sorting order by names. ...
In one of the previous examples, we covered how to sort an ArrayList in ascending order. In this post, you will learn how to sort ArrayList in descending order in Java. We will explore the following ways: Using the sort() method Using the Collections.sort() and Collections.reverse() ...
System.out.println("Unsorted ArrayList: "+ languages);//sortthe ArrayList in ascending orderlanguages.sort(Comparator.naturalOrder()); System.out.println("Sorted ArrayList: "+ languages); } } 输出 Unsorted ArrayList: [Python, Swift, C, JavaScript] Sorted ArrayList: [C, JavaScript, Python, Swift...
For example, You cansort an ArrayList of Objects in descending orderby just reversing the order of your Comparator. The JDK API provides another convenient methodCollections.reverseOrder(Comparator c)which returns a comparator with the opposite order of the given Comparator. Btw, this is not the ...
How to sort ArrayList in reverse order in java? How to sort a HashMap by keys and values in Java 3 Ways to sort a List in Java 8 and 11 Thanks for reading this article so far. If you have any questions or feedback then please drop a comment. If you like this article then please...
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() 方法的参数 sort() 方法的参数为一个 Comparator 对象。Comparator 是一个接口,用于定义元素之间的比较规则。要...
Below is an example of a sorted stream in reverse order. importjava.util.*;publicclassStreamCompareToExample{// Main functionspublicstaticvoidmain(String[]args){// Creating listList<coordinate>MyList=newArrayList<>();// Adding objects to listMyList.add(newcoordinate(20,200));MyList.add(newco...
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...
我们可以使用Comparator.reverseOrder()方法创建一个比较器,该比较器会按照相反的顺序对元素进行比较。 java import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; import java.util.List; public class Main { public static void main(String[] args) { List<Integer> ...
字符串反转: 方法1:---str.charAt() & str.length() 方法2:---StringBuilderreverse() ArrayList反转:集合工具类反转方法:Collections.reverseOrder() Demo: Code: Console: 相关资料: 反转字符串的7种方法(Java) java笔试中字符串翻转的几种方法(java---华为 ...