Пишет, что используется бесконечный цикл
package com.javarush.task.task20.task2025;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
/*
Алгоритмы-числа
*/
public class Solution {
public static long[] getNumbers(long N) {
ArrayList<Long> list = new ArrayList<Long>();
ArrayList<Character> numbers = new ArrayList<Character>();
for(long m=(N-1); m>0; m--){
String strN = Long.toString(m);
int znachnost = strN.length();
long konechnoe_chislo = 0;
for (int j = 0; j < strN.length(); j++) {
long l = 0;
char c = strN.charAt(j);
String s = Character.toString(c);
l = Long.valueOf(s);
long l1=l;
for (int r = 0; r < znachnost-1; r++) {
l1 *= l;
}
konechnoe_chislo += l1;
}
if (konechnoe_chislo == m) {
list.add(m);
}
}
long[] result = new long[list.size()];
for (int i = 0; i < list.size(); i++) {
result[i] = list.get(i);
}
return result;
}
public static void main(String[] args) {
long a = System.currentTimeMillis();
System.out.println(Arrays.toString(getNumbers(1000)));
long b = System.currentTimeMillis();
System.out.println("memory " + (Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory()) / (8 * 1024));
System.out.println("time = " + (b - a) / 1000);
a = System.currentTimeMillis();
System.out.println(Arrays.toString(getNumbers(1000000)));
b = System.currentTimeMillis();
System.out.println("memory " + (Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory()) / (8 * 1024));
System.out.println("time = " + (b - a) / 1000);
}
}