使用Java编程实现输出100以内的所有完美数

public class PerfectNumbers {
    public static void main(String[] args) {
        for (int i = 1; i <= 100; i++) {
            if (isPerfectNumber(i)) {
                System.out.println("完美数为："+i);
            }
        }
    }

    public static boolean isPerfectNumber(int num) {
        int sum = 0;
        for (int i = 1; i <= num / 2; i++) {
            if (num % i == 0) {
                sum += i;
            }
        }
        return sum == num;
    }
}