Java 程序按相反顺序对整数列表进行排序
以下是我们的整数数组
Integer[] arr = {20, 50, 100, 150, 200, 250, 300, 350, 400, 500};
现在将上面的整数数组转换成 List
List<Integer> list = new ArrayList<>(Arrays.asList(arr));
现在,按相反顺序对上面的 Integer list 进行排序
Comparator<Integer> initialComp = Integer::compare; Comparator<Integer> revComp = initialComp.reversed(); Collections.sort(list, revComp);
下面是一个按相反顺序对 Integer list 进行排序的示例
示例
import java.util.ArrayList; import java.util.Arrays; import java.util.Collections; import java.util.Comparator; import java.util.List; public class Demo { public static void main(String[] args) { Integer[] arr = {20, 50, 100, 150, 200, 250, 300, 350, 400, 500}; List<Integer> list = new ArrayList<>(Arrays.asList(arr)); System.out.println("Integer List = "+list); Comparator<Integer> initialComp = Integer::compare; Comparator<Integer> revComp = initialComp.reversed(); Collections.sort(list, revComp); System.out.println("Integer in reversed order..."); list .stream() .forEach(c -> System.out.print(c + "
")); } }
输出
Integer List = [20, 50, 100, 150, 200, 250, 300, 350, 400, 500] Integer in reversed order... 500 400 350 300 250 200 150 100 50 20
广告