找出字符串的最大值和最小值输出

In this little assignment you are given a string of space separated numbers, and have to return the highest and lowest number.

Example:

HighAndLow("1 2 3 4 5")  // return "5 1"
HighAndLow("1 2 -3 4 5") // return "5 -3"
HighAndLow("1 9 3 4 -5") // return "9 -5"

代码：

import java.util.Arrays;

public class Kata {

    //方法一
    public static String HighAndLow(String numbers) {
        numbers=numbers.replaceAll(" ",",");
        String[] a=numbers.split(",");
        int[] arr=new int[a.length];
        for(int i=0;i<a.length;i++){
            arr[i]=Integer.parseInt(a[i]);
        }
        Arrays.sort(arr);
        numbers=arr[arr.length-1]+" "+arr[0];
        return numbers;
    }

    public static String HighAndLow2(String numbers) {

        int min = Arrays.stream(numbers.split(" "))
                .mapToInt(i -> Integer.parseInt(i))
                .min()
                .getAsInt();

        int max = Arrays.stream(numbers.split(" "))
                .mapToInt(i -> Integer.parseInt(i))
                .max()
                .getAsInt();

        return String.format("%d %d", max, min);
    }

    public static void main(String[] args) {
        String numbers="8 3 -5 42 -1 0 0 -9 4 7 4 -4";
        System.out.println(HighAndLow(numbers));
        System.out.println(HighAndLow2(numbers));
    }
}