ex4.java

讲述各种各样的java初始编程 了解编程

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package chenchao1;

import java.util.*;

/**
 *
 * @author williechen
 */
public class Ex4 {

    ArrayList<Integer> result = new ArrayList<Integer>();

    public static void main(String[] args) {
        Ex4 ex4 = new Ex4();
        ex4.getNarcissus();
        System.out.println(ex4.result);

    }

    void getNarcissus() {
        for (int i = 100; i <= 999; i++) {
            String temp = Integer.toString(i);
            char[] ia = temp.toCharArray();
            int sum = 0;
            int product = 0;
            for (char c : ia) {
                int t = c - 48;         // here, the ASCII code's number starts from 48
                product = (int)Math.pow(t, 3);
                sum += product;
            }
            if (sum == i) {
                result.add(i);
            }
        }
    }
}