一个数如果恰好等于它的真因子之和,这个数就称为"完数"。例如6=1＋2＋3。编程找出1000以内的所有完数。用Java代码写

public class PerfectNumber {
public static void main(String[] args) {
for (int i = 1; i <= 1000; i++) {
if (isPerfect(i)) {
System.out.println(i);
}
}
}

public static boolean isPerfect(int n) {
int sum = 0;
for (int i = 1; i < n; i++) {
if (n % i == 0) {
sum += i;
}
}
return sum == n;
}
}