怎么易懂

[JAVA-阿姚]

计算字符串“23743298”奇数位的和偶数位的和

[淡青の月]

public static void main(String[] args) {
sumOfNum("23743298");
}
public static void sumOfNum(String str) {
int sumOfOdd = 0;
int sumOfEven = 0;
int index = 1;
Integer num = Integer.parseInt(str);
while(index <= str.length()) {
if(index%2 == 1) {
sumOfOdd += num%10;
}else {
sumOfEven += num%10;
}
num /= 10;
index++;
}
System.out.println("奇数位的和为"+sumOfOdd);
System.out.println("偶数位的和为"+sumOfEven);
}

[Waiting Alone]

String s = "23743298"; List<Integer> list = new ArrayList<Integer>(); for (int i = 0; i < s.length(); i++) { list.add(Integer.valueOf(s.substring(i, i + 1))); } // 奇数和 int oddCount = 0; // 偶数和 int evenCount = 0; for (int i = 0; i < list.size(); i++) { if (list.get(i) % 2 == 0) { evenCount += list.get(i); } else { oddCount += list.get(i); } } System.out.println("奇数和：" + oddCount); System.out.println("偶数和：" + evenCount);

[沁海棠]

    public static void main(String[] args) {
        Map<String, Integer> map = sumOfNum("23743298", "oddCount", "evenCount");
        System.out.println(map.get("oddCount"));
        System.out.println(map.get("evenCount"));
    }
    public static Map<String,Integer> sumOfNum(String str,String oddCountKey,String evenCountKey){
        String[] split = str.split("");
        int oddCountTemp = 0;
        int evenCountTemp = 0;
        for (String s : split) {
            int i = Integer.parseInt(s);
            if(i%2 == 0){
                evenCountTemp += i;
            }else{
                oddCountTemp += i;
            }
        }
        Map<String,Integer> map = new HashMap<>();
        map.put(oddCountKey,oddCountTemp);
        map.put(evenCountKey,evenCountTemp);
        return map;
    }

[qybao]

呵呵。。。

public class Sample {
	public static void main(String[] args) {
		try {
			String s = "23743298";
			s = s.replaceAll("", " ").substring(1);
			Scanner sc = new Scanner(s);
			int cnt = 1, sumO = 0, sumE = 0;
			while(sc.hasNext()) {
				if (cnt%2 == 1) {
					sumO += sc.nextInt();
				} else {
					sumE += sc.nextInt();
				}
				cnt++;
			}
			System.out.printf("sumO=%d, sumE=%d", sumO, sumE);
		} catch (Throwable e) {
			e.printStackTrace();
		}
	}
}