Работает правильно, кажется
package com.javarush.task.task07.task0728;
import java.util.Arrays;
import java.io.BufferedReader;
import java.io.InputStreamReader;
public class Solution {
public static void main(String[] args) throws Exception {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
int[] array = new int[20];
for (int i = 0; i < 20; i++) {
array[i] = Integer.parseInt(reader.readLine());
}
Arrays.sort(array);
sort(array);
for (int value : array) {
System.out.println(value);
}
}
public static void sort(int[] array) {
for (int i=0; i<array.length/2; i++){
int temp = array[i];
array[i] = array[array.length -1 -i];
array[array.length -1 -i] = temp;
}
}
}