Домашняя работа

package com.company;
import java.util.*;
public class Solution {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("===Первое заданиие===");
        System.out.println("Enter word:");
        String qwe = in.next();
        int l = qwe.length();
        ArrayList<String> asd = new ArrayList<String>();
        while (asd.size() != (int) (Math.pow(l, l))) {
            String z = "";
            for (int j = 0; j < l; j++) {
                z += qwe.charAt(0 + (int) (Math.random() * l));
            }
            if (asd.contains(z)) continue;
            else asd.add(z);
        }
        for (String x : asd) {
            System.out.println(x);
        }

        System.out.println("===Второе заданиие===");
        String y = in.nextLine();
        String[] e = y.split(" ");
        for (int i = e.length - 1; i >= 0; i--) {
            System.out.print(e[i] + " ");
        }


        System.out.println("===Третье заданиие===");
        HashSet<Character> v = new HashSet<Character>();
        String r = in.nextLine();
        char[] a = r.toCharArray();
        for (char i : a) {
            v.add(i);
        }
        for (char i : v) {
            System.out.print(i);
        }


        System.out.println("===Четвертое заданиие===");
        int[] sd = {1, 2, 3, 4, 43, 34, 5, 134, 43, 62, 3, 3};
        Arrays.sort(sd);
        for (int i : sd) {
            System.out.println(i);
        }


        System.out.println("===Пятое заданиие===");
        Map map = new HashMap();
        map.put(1, "один");
        map.put(2, "два");
        map.put(3, "три");
        int sum = 0;
        for (Object i : map.keySet()) {
            sum += Integer.parseInt(i.toString());
        }
    }
}